While agricultural work is hazardous for all workers, migrant workers face additional challenges that make them more vulnerable than domestic workers. The lack of access to permanent immigration status in the Seasonal Agricultural Worker Program (SAWP) and the agricultural stream of the Temporary Foreign Workers Program (TFWP) makes workers’ jobs hinge on retaining their employers’ favour and creates a particular type of job insecurity that overshadows their behaviour, decisions, and agency to assert their rights for safe and healthy workplaces and workers’ compensation. While researchers argue that the TFWP competes with the SAWP as employers search for the cheapest and most docile workers, less research has examined whether workers’ health and safety exposures and experiences differ within the two programs. Drawing primarily from interviews with advocates and system stakeholders and participant observation at advocate-organized events, this research will offer preliminary answers to discovering whether the programs pose different obstacles to improving health and safety and access to compensation that affect migrant workers’ experiences in Ontario before and after injury. The research will help gather information about possible avenues to improve the health and safety of migrant workers given how the two programs operate within both federal and provincial frameworks. Advocates’ experience assisting workers in both programs offers important insights about whether differences between the programs create particular vulnerabilities for some migrant workers. / Thesis / Master of Arts (MA) / This research identifies opportunities and barriers that migrant agricultural workers and their advocates face in improving occupational health and safety and access to workers' compensation in the Seasonal Agricultural Workers Program (SAWP) and the agricultural stream of the Temporary Foreign Workers Program (TFWP). Through semi-structured interviews, participant observation, and document review, the research will help identify whether interplay between the programs causes additional vulnerabilities for some workers. The research will help gather information about possible avenues to improve the health and safety of migrant workers given how the two programs operate in a federal and provincial framework.

Le diagnostic de l'asthme professionnel (AP) est toujours un défi. Le test de provocation bronchique spécifique (TPS), comme une méthode de diagnostic de référence, n’est pas aisément accessible. Cette étude diagnostique rétrospective vise à évaluer des outils diagnostiques actuels et à développer des scores cliniques pour AP (définis comme ayant le résultat positif en TPS). Les données concernant les travailleurs soupçonnés d'avoir de l’AP qui, d’une part, ont été exposés aux agents de haut-poids-moléculaire élevé (HPM) (n=139) et à bas-poids-moléculaire (BPM) (n=285), et d’autre part, ont travaillé encore un mois avant de l’évaluation de TPS. Par ailleurs, les modèles de régression logistique sont développés dans chaque groupe d'exposition. Ainsi, concernant des tests objectifs, les valeurs de différents tests distinctifs sont ajoutées aux caractéristiques cliniques, et enfin, le résultat a été évalué. Les modèles ont été testés pour l’exactitude, et pour la validation interne par la procédure bootstrapping. Suite à cela, les modèles finaux sont traduits en scores cliniques et le score total est stratifié en groupes à risque. Chez les travailleurs exposés à des agents BPM, si le test de la méthacholine est fait isolément, le modèle prédictif n'a pas montré de meilleures valeurs diagnostiques que le test de provocation. Cependant, dans le groupe HPM, le modèle final, y compris le sexe, l'âge> 40 ans, la durée des symptômes ≥1 an, la rhinoconjonctivite, l'utilisation de corticostéroïdes inhalés, le test de provocation à la méthacholine, et le test de la piqûre épidermique spécifique, avait un bon calibrage et une validation interne raisonnable. Par ailleurs, la catégorie de sujets avec une probabilité élevée d’avoir AP avait une meilleure spécificité et une meilleure valeur prédite positive par rapport à la combinaison de test de provocation à la méthacholine et de la piqûre épidermique spécifique dans la détection de l'AP, cependant n'avait pas de signification statistique. En conclusion, ce modèle quantifie la probabilité individuelle d'AP. Dans les centres où l'accès à TPS est difficile ou impossible, notre modèle serait utile dans le diagnostic d’OA, néanmoins, la validation externe du modèle reste nécessaire. Mots-clés : asthme professionnel, modèle diagnostique, prévention, score clinique. / The diagnosis of occupational asthma (OA) is challenging since the use of specific inhalation challenge (SIC) as the reference test is not widely accessible. This retrospective diagnostic study is aimed to evaluate current diagnostic tools and to develop clinical scores for OA (defined as positive SIC). Data from workers with suspected OA who were exposed to high-molecular-weight (HMW) (n=139) and low-molecular-weight (LMW) agents (n=285) and still working one month before the SIC were evaluated. Logistic regression models were developed in each exposure group. The added values of different objective tests to clinical and exposure characteristics were evaluated. The models were tested for accuracy, and, validated internally by the bootstrapping procedure. The final models were translated into clinical score and the sum scores were stratified into risk groups. In workers exposed to LMW agents, the predictive model did not perform better diagnostically than the methacholine challenge test alone. In the HMW group, the final model including sex, age >40 years, symptom duration ≥1 year, rhinoconjunctivitis, inhaled corticosteroid use, the methacholine challenge test, and specific SPT had a good accuracy and reasonable internal validation. The high probability category of the predictive model had a better specificity and positive predicted value compared to the combination of methacholine challenge test and specific SPT in detecting OA but did not reach the statistical significance. Our results suggest that this model could quantify an individual’s probability of OA. This model emphasizes the necessity of performing both tests in order to have a more accurate diagnosis in workers exposed to HMW agents. In centers where access to SIC is difficult or impossible, our model might be of benefit in diagnosing OA. Nevertheless, external validation of the model is necessary. Key words: occupational asthma, diagnostic model, prevention, clinical score.

A good Occupational Health and Safety (OHS) is needed to reach sustainability. OHS consists of three parts: 1) physical, 2) mental and 3) social.  The purpose of this study was to explore and foresee the main physical OHS risks when upscaling the recycling of wood in Lithuania, with the goal to prevent those risks.  The study was explorative and interviews with semi-structured questions were used as a method. Three of the four informants mentioned air pollution, traffic, working equipment, safety equipment, and chemical risk. The highest rate of physical risks mentioned was the physical ones and then the mechanical risks. Opinions differ whether the risks would change when upscaling the industry, from no stressed or additional risks to all risks being stressed and added risk.  Results should be seen as a hint of direction when it comes to OHS risks within wood recycling in Lithuania.

During the last decade, the Swedish work environment authority (AV) observed a stagnancy of fatal accidents in Sweden. According to statistics, the building industry in Sweden is one of the third largest industries regarding occupational injuries and the industry with the most severe recorded fatal accidents. Scientific contributions have found that efforts and focus on health and safety aspects during the planning and design phases (early phases) could reduce work environment problems in the construction and maintenance phases. The purpose of this study is to explore how the construction client can improve the health and safety aspects in the early phases to enhance the work environment in the construction and maintenance phases. Further, identify the main challenges of health and safety in the early phases to improve the work environment at the construction and maintenance phases. The study has applied qualitative methods, with 13 semi-structured interviews with senior project managers at a public construction client in Sweden. After analyzing the semi-structured interviews, the findings were discussed with an expert panel for further clarifications. This study has identified that health and safety aspects during the planning and design can improve by different measures and methods to ensure a safer work environment in the construction project. It should be a priority for the construction client to be proactive with the health and safety aspects in the early phases. Furthermore, identified the study three main challenges of health and safety aspects. These challenges of health and safety aspects have been identified as crucial to address in the early phases for succeeding in preventing occupational accidents in construction projects. The first identified challenge is the lack of the construction clients' consciousness of their profound responsibilities in the work environment. The second challenge raised is the insufficient work environment competencies of the applied BAS-P and designers in the construction project. The last identified challenge is the lack of safety communication in the construction project, as the transfer meeting between the BAS-P and BAS-U and lessons learned meetings. The portrayed main challenges seem to face both countries inside and outside the EU, as reasoned from the discussion with Åsgård et al. Furthermore, the work environment is essential for commitment, re-evaluation, and improvements in routine activity. Including the construction clients and the involved actors in the construction process to achieve a construction industry with zero accidents and fatalities. / Arbetsmiljöverket (AV) har under det senaste decenniet observerat en stagnation av dödsolyckor i Sverige. Enligt statistik är byggbranschen i Sverige en av de tredje största branscherna när det gäller arbetsskador och den bransch som har flest registrerade dödsolyckor. Vetenskapliga studier har visat att prioriteringar och fokus på hälsa och säkerhet under planerings- och projekterings skeden (tidiga skeden) kan bidra till att undvika arbetsmiljöproblem på byggarbetsplatsen i produktions skede, liksom i underhållsskedet. Syftet med denna studie är att undersöka hur byggherren kan förbättra hälso- och säkerhetsaspekterna i de tidiga skedena för att förstärka arbetsmiljön i produktions- och underhållsskedena. Även att identifiera de viktigaste utmaningarna för hälso- och säkerhetsaspekter i de tidiga faserna för att förbättra arbetsmiljön i produktions- och underhållsskedena. Studien har tillämpat kvalitativa metoder, där semi-strukturerade intervjuer genomfördes med 13 projektledare hos en offentlig byggherre i Sverige. Efter att ha analyserat resultaten från de semi-strukturerade intervjuerna diskuterades analysen med en expertpanel. Resultatet i denna studie har identifierat att hälso- och säkerhetsaspekter under planering och projektering skedena kan förbättras med olika åtgärder och metoder för att säkerställa en säkrare arbetsmiljö i byggprojektet. Vad man finner är att det bör vara en prioritet för byggkunden att vara proaktiv med hälso- och säkerhetsaspekterna i de tidiga faserna. Tre huvudutmaningar för hälso- och säkerhetsaspekter har dessutom identifierats i resultatet. Dessa utmaningar för hälso- och säkerhetsaspekter ses som avgörande att hantera i de tidiga faserna för att lyckas med förebyggandet av arbetsolyckor i byggprojekt. Den första identifierade utmaningen är bristen på byggherrarnas medvetenhet om deras ansvar i arbetsmiljön. Den andra utmaningen som tas upp är den otillräckliga arbetsmiljökompetensen hos den tillämpade BAS-P och projektörerna i byggprojektet. Den sista identifierade utmaningen är bristen på säkerhetskommunikation i byggprojektet, som överföringsmöte mellan BAS-P och BAS-U och erfarenhetsåterföringsmöten. De viktigaste utmaningarna som presenteras i denna studie för förbättra hälso- och säkerhetsaspekterna i dem tidiga skedena verkar vara utmaningar som finns både i länderna inom och utanför EU, vilket togs upp i diskussionen med Åsgård et al. Dessutom dras slutsatsen att arbetsmiljön är ett viktigt ämne där engagemang, omvärdering och förbättringar bör vara en återkommande aktivitet. För både byggherren och de involverade aktörerna i hela byggprocessen för att uppnå en byggbransch med noll olyckor och dödsfall.

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Det elektriska isolationssystemet för stora roterande maskiner består av ett kompositmaterial av glimmertejp och ett värmehärdande harts. Hartset hjälper till att mekaniskt stabilisera lindningsstrukturen i statorn samt ersätter luftinneslutningar i isolationssystemet för att undertrycka bildandet av elektriska urladdningar. Vakuumtryckimpregneringsprocessen (VPI) är den föredragna tekniken för att impregnera glimmerisolationen med det värmehärdande hartset. Hartset som används i VPI-processen är sammansatt av flera nyckelkomponenter, inklusive den härdbara polymeren, härdare som deltar i tvärbindning, reaktiva utspädningsmedel för förbättrade processegenskaper och ytterligare tillsatser som katalysatorer och stabilisatorer. Olika hartskemier har använts under åren för VPI-processen. Det finns dock betydande farhågor när det gäller påverkan på miljö- och arbetshälsa för några av dessa komponenter. Den ökade medvetenheten om de skadliga effekterna av olika kemikalier har drivit på arbetet med att utveckla hartser med reducerade flyktiga organiska föreningar som kan vara skadliga för såväl miljön som de som hanterar hartset i stora mängder. Dessutom har stränga EU-regler klassificerat vissa härdare och reaktiva utspädningsmedel som ’substances of very high concern’, vilket har lett till ett stort behov av att hitta alternativ för dessa föreningar. Detta examensarbete består av en litteraturstudie som har genomförts med hänsyn till de önskade egenskaperna för VPI-hartser för att utvärdera potentiella kandidater som alternativ till härdare och reaktiva utspädningsmedel. Fyra olika impregneringshartser har tagits i beaktande som alternativ. Olika härdningskinetikparametrar har uppmätts med olika karakteriseringstekniker såsom infraröd spektroskopi av Fouriertransform i realtid, reologi och differentiell scanningkalorimetri. Eftersom de termiska, elektriska och mekaniska egenskaperna är nödvändiga för att säkerställa långvarig livslängd för industriellt nyttjade roterande maskiner, har olika egenskaper studerats genom att utföra dynamisk mekanisk analys, drag- och böjningstestning samt dielektrisk spektroskopi, genom att härda hartserna under lämpliga tids- och temperaturförhållanden. Alla de fyra hartserna visade varierande härdningskinetikparametrar och egenskaper som har korrelerats till hartskemin samt att hartsernas egenskaper har utvärderats i jämförelse med varandra. / The electrical insulation system for large rotating machines consists of a composite material of mica tape and a thermosetting resin. The resin helps in mechanically stabilizing the winding structure in the stator as well as replaces air inclusions in the insulation system to suppress the formation of discharges. Vacuum pressure impregnation (VPI) is the preferred technique to impregnate this mica tape with the thermosetting resin. The resin used in VPI process is composed of several key components, including the thermoset polymer, a hardener that participates in crosslinking, reactive diluents for improved processability and and additional additives like catalysts and stabilizers. Different chemistries have been used over the years for the VPI process. However, there are significant concerns regarding the environmental and occupational health and safety of some of these components.  The increasing awareness of the harmful effects of various chemicals has driven efforts to develop resins with reduced volatile organic compounds which can be detrimental to both the environment as well as those who are handling the resin in large quantities. Furthermore, stringent EU regulations have classified some hardeners and reactive diluents as substances of very high concern which has resulted in pressing need to find alternatives for these compounds.  This thesis, thus, consists of a literature study which has been performed taking the desired properties for VPI resins into consideration to evaluate potential candidates as alternatives for hardeners, and reactive diluents. Four different chemistries of impregnation have been taken into consideration as alternatives. Different curing kinetics parameters have been measured by different characterization techniques such as real time Fourier transform infrared spectroscopy, rheology, and differential scanning calorimetry. As the thermal, electric, and mechanical factors are necessary to ensure long term lifespan of industrial machines, different properties have been studied by performing dynamic mechanical analysis, tensile and flexural testing as well as dielectric spectroscopy by curing the resins under appropriate time and temperature conditions. All the four resins showed varied curing kinetics parameters and properties which have been correlated to the chemistry involved in the resin as well as evaluated in comparison to each other.

Las empresas ferreteras son establecimientos especializados en la comercialización de materiales y herramientas de construcción para todo tipo de clientes, especialmente para el sector residencial. Estas empresas cuentan con una fuerza laboral significativa, que se encuentra expuesta a diversos factores de riesgo psicosocial debido a la naturaleza exigente de su trabajo. Por tal razón, se ha planteado como objetivo general determinar los factores de riesgos psicosociales en colaboradores de una empresa distribuidora ferretera en el año 2023. La metodología empleada fue un enfoque cuantitativo, de tipo descriptivo, con un diseño no experimental y transversal. Asimismo, la muestra fue censal, incluyendo a 112 colaboradores con más de 3 meses de antigüedad. Además, la técnica utilizada fue la encuesta y el instrumento fue un cuestionario con escala Likert bajo el modelo propuesto por Roussos (2023). Los resultados principales revelaron que los factores de riesgo psicosocial más influyentes fueron la cultura organizativa, la salud y bienestar, y la satisfacción y compromiso laboral. Como conclusión, la investigación identificó que los colaboradores enfrentan problemas como la falta de apoyo de la dirección, excesiva carga de trabajo y limitadas oportunidades de desarrollo profesional, lo que afecta su desempeño y bienestar. / Hardware stores are establishments specialized in the commercialization of construction materials and tools for all types of customers, especially for the residential sector. These companies have a significant workforce that is exposed to various psychosocial risk factors due to the demanding nature of their work. For this reason, the general objective was to determine the psychosocial risk factors in employees of a hardware distribution company in 2023. The methodology used was a quantitative approach, descriptive in nature, with a non-experimental and cross-sectional design. Likewise, the sample was census-based, including 112 employees with more than 3 months of experience. Furthermore, the technique used was a survey, and the instrument was a questionnaire with a Likert scale based on the model proposed by Roussos (2023). The main results revealed that the most influential psychosocial risk factors were organizational culture, health and well-being, and job satisfaction and commitment. In conclusion, the research identified that employees face problems such as lack of support from management, excessive workload, and limited opportunities for professional development, which affects their performance and well-being.

La presente investigación busco optimizar la gestión de riesgos laborales para mejorar los indicadores de desempeño en seguridad en la Empresa de Telecomunicaciones Inversiones PG; con ello se busca mantener una minimización de los riesgos que se susciten al desarrollar diversas labores tanto en campo como en oficina. La metodología de investigación estuvo basada en un estudio de tipo aplicada, nivel descriptivo y diseño preexperimental, empleando como instrumento el análisis documental y la observación. Así mismo, se tuvo en cuenta la aplicación de técnicas como la verificación de indicadores de Seguridad de la empresa de telecomunicaciones Inversiones PG, mapeo de procesos e IPERC, permitiendo detectar las carencias presentes en la empresa en relación a la Seguridad y Salud en el Trabajo. Al realizar el análisis inicial se tuvo en cuenta que la empresa de telecomunicaciones presentaba un nivel de implementación del 37% con un estatus “Desaprobado”, además de contar con una alta presencia de riesgos mecánicos (36%) y consigo observar un total de 75 incidentes de riesgo y 16 accidentes incapacitantes, por lo cual se propuso el diseño del plan de gestión de riesgos logrando un aumento en el nivel de implementación (77%) presentando un estatus “Aprobado”, además de contemplar las diversas actividades de prevención y minimización de los riesgos presentes. / This research sought to optimize the management of occupational risks to improve safety performance indicators in the Telecommunications Company Inversiones PG; thus, it seeks to maintain a minimization of the risks that arise when developing various tasks both in the field and in the office. The research methodology was based on an applied study, descriptive level and pre-experimental design, using documentary analysis and observation as instruments. Likewise, the application of techniques such as the verification of Safety indicators of the telecommunications company Inversiones PG, process mapping and IPERC was taken into account, allowing to detect the deficiencies present in the company in relation to Safety and Health at Work. The initial analysis took into account that the telecommunications company had an implementation level of 37% with a "Disapproved" status, in addition to having a high presence of mechanical risks (36%) and a total of 75 risk incidents and 16 disabling accidents, for which the design of the risk management plan was proposed, achieving an increase in the implementation level (77%) with an "Approved" status, in addition to contemplating the various activities for the prevention and minimization of the risks present.

En el presente estudio se propone el diseño de un sistema de SST para reducir los riesgos laborales en la empresa Casa Blanca SRL. Para ello, se diagnosticó la situación actual de toda la empresa, en el que se identificó un total de 200 días por ausentismo del personal durante el periodo 2019-2021 a causa de accidentes laborales, generando costos directos de S/ 23 275, así como el cumplimiento de solo el 11% en relación a los requisitos de la Ley 29783 y por medio de la matriz Ishikawa se determinó las causales de mano de obra, medio, método y maquinaria. Luego, a través de la Matriz IPER se identificaron un total de 14 riesgos en las actividades de la empresa, de los cuales el 79 % son del tipo moderado y el 21 % son altos. Posteriormente, para el diseño del sistema de SST se terminaron los controles operacionales para las causales antes mencionadas, midiendo el impacto por medio de una matriz IPERC, obteniendo la reducción de riesgos a 86% tolerables y 14% a moderados. Para el diseño de sistema propuesto se tomó en cuenta los documentos y registros obligatorios que establece la ley 29783, proyectándose al cumplimiento de los requisitos en un 86%. Finalmente, con la evaluación económica, se demostró la viabilidad de la propuesta de diseño, obteniendo un VAN de S/ 37 265, TIR de 88% y un B/C de 1,61. / In the present study, the design of an OSH system is proposed to reduce occupational risks in the company Casa Blanca SRL. For this, the current situation of the entire company was diagnosed, in which a total of 200 days due to staff absenteeism during the 2019-2021 period due to work accidents were identified, generating direct costs of S/ 23,275, as well as compliance of only 11% in relation to the requirements of Law 29783 and through the Ishikawa matrix, the causes of labor, means, method and machinery were determined. Then, through the IPER Matrix, a total of 14 risks were identified in the company's activities, of which 79% are of the moderate type and 21% are high. Subsequently, for the design of the SST system, the operational controls for the aforementioned causes were completed, measuring the impact through an IPERC matrix, obtaining a risk reduction of 86% tolerable and 14% moderate. For the proposed system design, the mandatory documents and records established by Law 29783 were taken into account, projecting 86% of the requirements to be met. Finally, with the economic evaluation, the feasibility of the design proposal was demonstrated, obtaining a NPV of S/ 36,436, an IRR of 96% and a B/C of 1.66.

Det elektriska isolationssystemet för stora roterande maskiner består av ett kompositmaterial av glimmertejp och ett värmehärdande harts. Hartset hjälper till att mekaniskt stabilisera lindningsstrukturen i statorn samt ersätter luftinneslutningar i isolationssystemet för att undertrycka bildandet av elektriska urladdningar. Vakuumtryckimpregneringsprocessen (VPI) är den föredragna tekniken för att impregnera glimmerisolationen med det värmehärdande hartset. Hartset som används i VPI-processen är sammansatt av flera nyckelkomponenter, inklusive den härdbara polymeren, härdare som deltar i tvärbindning, reaktiva utspädningsmedel för förbättrade processegenskaper och ytterligare tillsatser som katalysatorer och stabilisatorer. Olika hartskemier har använts under åren för VPI-processen. Det finns dock betydande farhågor när det gäller påverkan på miljö- och arbetshälsa för några av dessa komponenter. Den ökade medvetenheten om de skadliga effekterna av olika kemikalier har drivit på arbetet med att utveckla hartser med reducerade flyktiga organiska föreningar som kan vara skadliga för såväl miljön som de som hanterar hartset i stora mängder. Dessutom har stränga EU-regler klassificerat vissa härdare och reaktiva utspädningsmedel som ’substances of very high concern’, vilket har lett till ett stort behov av att hitta alternativ för dessa föreningar. Detta examensarbete består av en litteraturstudie som har genomförts med hänsyn till de önskade egenskaperna för VPI-hartser för att utvärdera potentiella kandidater som alternativ till härdare och reaktiva utspädningsmedel. Fyra olika impregneringshartser har tagits i beaktande som alternativ. Olika härdningskinetikparametrar har uppmätts med olika karakteriseringstekniker såsom infraröd spektroskopi av Fouriertransform i realtid, reologi och differentiell scanningkalorimetri. Eftersom de termiska, elektriska och mekaniska egenskaperna är nödvändiga för att säkerställa långvarig livslängd för industriellt nyttjade roterande maskiner, har olika egenskaper studerats genom att utföra dynamisk mekanisk analys, drag- och böjningstestning samt dielektrisk spektroskopi, genom att härda hartserna under lämpliga tids- och temperaturförhållanden. Alla de fyra hartserna visade varierande härdningskinetikparametrar och egenskaper som har korrelerats till hartskemin samt att hartsernas egenskaper har utvärderats i jämförelse med varandra. / The electrical insulation system for large rotating machines consists of a composite material of mica tape and a thermosetting resin. The resin helps in mechanically stabilizing the winding structure in the stator as well as replaces air inclusions in the insulation system to suppress the formation of discharges. Vacuum pressure impregnation (VPI) is the preferred technique to impregnate this mica tape with the thermosetting resin. The resin used in VPI process is composed of several key components, including the thermoset polymer, a hardener that participates in crosslinking, reactive diluents for improved processability and and additional additives like catalysts and stabilizers. Different chemistries have been used over the years for the VPI process. However, there are significant concerns regarding the environmental and occupational health and safety of some of these components.  The increasing awareness of the harmful effects of various chemicals has driven efforts to develop resins with reduced volatile organic compounds which can be detrimental to both the environment as well as those who are handling the resin in large quantities. Furthermore, stringent EU regulations have classified some hardeners and reactive diluents as substances of very high concern which has resulted in pressing need to find alternatives for these compounds.  This thesis, thus, consists of a literature study which has been performed taking the desired properties for VPI resins into consideration to evaluate potential candidates as alternatives for hardeners, and reactive diluents. Four different chemistries of impregnation have been taken into consideration as alternatives. Different curing kinetics parameters have been measured by different characterization techniques such as real time Fourier transform infrared spectroscopy, rheology, and differential scanning calorimetry. As the thermal, electric, and mechanical factors are necessary to ensure long term lifespan of industrial machines, different properties have been studied by performing dynamic mechanical analysis, tensile and flexural testing as well as dielectric spectroscopy by curing the resins under appropriate time and temperature conditions. All the four resins showed varied curing kinetics parameters and properties which have been correlated to the chemistry involved in the resin as well as evaluated in comparison to each other.