The moisture absorption behavior of Zylon fibers was characterized in various high temperature and high humidity conditions in a controlled environment. The results of these thermal cycling tests show that PBO fibers not only absorb, but also retain moisture (approximately 0.5-3%) when exposed to elevated temperature and humidity cycles. Also, the impurities of Zylon fibers were characterized through the use of Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) and solid state Nuclear Magnetic Resonance (NMR). These tests demonstrated that, in addition to other impurities, PBO fibers may contain up to 0.55 weight percent phosphorus, and that this phosphorus is present in the form of phosphoric acid. It was also shown through accelerated hydrolytic degradation tests that production procedures used to neutralize the acid present in the fibers have a beneficial effect on the hydrolytic performance of the fiber. The data collected in this study was then compared and contrasted to known Kevlar studies, identifying similarities, differences, and potential trends. The results of these tests seem to indicate that there is accelerated acid catalyzed hydrolysis occurring in the fiber which is causing these fibers to degrade at an increased rate. This condition is further accelerated by heat and humidity induced permanent fiber swelling.

The moisture absorption behavior of Zylon fibers was characterized in various high temperature and high humidity conditions in a controlled environment. The results of these thermal cycling tests show that PBO fibers not only absorb, but also retain moisture (approximately 0.5-3%) when exposed to elevated temperature and humidity cycles. Also, the impurities of Zylon fibers were characterized through the use of Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS) and solid state Nuclear Magnetic Resonance (NMR). These tests demonstrated that, in addition to other impurities, PBO fibers may contain up to 0.55 weight percent phosphorus, and that this phosphorus is present in the form of phosphoric acid. It was also shown through accelerated hydrolytic degradation tests that production procedures used to neutralize the acid present in the fibers have a beneficial effect on the hydrolytic performance of the fiber. The data collected in this study was then compared and contrasted to known Kevlar studies, identifying similarities, differences, and potential trends. The results of these tests seem to indicate that there is accelerated acid catalyzed hydrolysis occurring in the fiber which is causing these fibers to degrade at an increased rate. This condition is further accelerated by heat and humidity induced permanent fiber swelling.

O câncer de mama tem motivado pesquisas de avaliação e intervenção psicológica pelos altos índices de mulheres acometidas pela doença, por ser o segundo tipo de câncer mais comum entre as mulheres no mundo e também responsável pelo maior número de mortes. As pacientes com câncer de mama enfrentam o sofrimento psíquico com o diagnóstico e as vicissitudes do tratamento oncológico, necessitando de ajuda psicológica urgente. Definiu-se como objetivo geral desta pesquisa investigar os efeitos terapêuticos da Psicoterapia Breve Operacionalizada (PBO) no atendimento de mulheres diagnosticadas com câncer de mama e em tratamento oncológico. Como objetivos específicos este estudo pretende averiguar os efeitos da técnica da PBO nas situações-problema localizadas nos setores adaptativos e verificar a eficiência da PBO nas situações de crise adaptativa. A pesquisa foi delineada pelo método misto e as participantes foram 17 mulheres, com idade entre 30 e 65 anos, que estavam em tratamento num ambulatório de oncologia do Grande ABC Paulista. Os instrumentos utilizados foram: entrevista clínica preventiva; Escala Diagnóstica Adaptativa Operacionalizada (EDAO) para avaliação da adaptação, antes e após a intervenção psicológica breve e no follow-up; e a PBO. Os resultados mostraram na avaliação inicial que 17,5% das participantes estavam com adaptação ineficaz grave (grupo 5), 53% estavam com adaptação ineficaz severa (grupo 4), 17,5% com adaptação ineficaz moderada (grupo 3) e 13% com adaptação ineficaz leve (grupo 2), sendo que 41,2% estavam em crise adaptativa por perda; o setor Orgânico foi o mais comprometido, seguido do Afetivo-Relacional com soluções pouquíssimo adequadas. A situação-problema da maior parte das participantes estava relacionada ao câncer de mama, o que na compreensão psicodinâmica mostrou-se associada ao intenso desamparo egóico diante do adoecimento e tratamento oncológico. Na avaliação adaptativa final e follow-up, 82,4% das participantes apresentaram evolução de grupo adaptativo. Concluímos que a PBO se mostrou eficiente em todas as idades, estado civil, escolaridade, tempo de diagnóstico, fase de tratamento oncológico e tipo de cirurgia (mastectomia radical ou parcial) e a técnica da interpretação teorizada mostrou-se eficiente para a solução das situações-problema e da crise adaptativa por perda. A motivação, a aliança terapêutica e a transferência positiva foram fundamentais para as participantes no aproveitamento das sessões / Breast cancer has motivated research of evaluation and psychological intervention by the high rates of women affected by the disease, because it is the second most common cancer among women worldwide and also responsible for more deaths. Patients with breast cancer face the psychological suffering with diagnosis and the events of cancer treatment, requiring urgent psychological help. Thus this research had as a general objective investigate the therapeutic effects of Brief Psychotherapy Operationalized (PBO) in the care of women diagnosed with breast cancer and cancer treatment. And the specific objectives were to investigate the effects of PBOs technique in problem-situations located in adaptive sectors and verify the efficiency of the PBO in situations of adaptive crisis. The research was outlined by the mixed method and the participants were 17 women aged 30 to 65, who were being treated in an oncology outpatients clinic in São Paulo. The instruments used were: preventive clinical interview, Adaptative Operational Diagnostic Scale (EDAO) for evaluation of adaptation before and after the brief psychological intervention and follow-up; and the PBO. The results showed in the initial evaluation that 17,5% of participants were in ineffective adaptation serious (group 5), 53% were in ineffective adaptation severe, 17,5% ineffective adaptation moderate and 13% ineffective adaptation light, whereas 41,2% were in the adaptative crisis by loss; the Organic sector was the most committed, followed by the Affective-Relational with solutions very little adequate. The problem-situation of most participants was related to breast cancer, which in psychodynamic understanding was associated to the intense helplessness ego in the face of illness and cancer treatment. In the final adaptive evaluation and follow-up, 82,4% of participants presented evolution of adaptive group. We concluded that the PBO was efficient at all ages, marital status, scholarity, time of diagnosis, cancer treatment stage and type of surgery (radical and partial mastectomy) and the technique of interpretation theorized proved efficient for the solution of problem- situations and adaptive crisis by loss. The motivation, the therapeutic alliance and positive transference were crucial for the participants in harnessing of the sessions

Zur Erweiterung der Grundlagenkenntnisse für diese beiden bisher wenig genutzten Verstärkungsfasern werden in dieser Arbeit Einzelfaserzugversuche durchgeführt, um den Einfluss der Prüfbedingungen und der Faseroberflächenbehandlungen auf die mechanischen Eigenschaften der Fasern zu charakterisieren. Durch die Analysen der unimodalen und bimodalen Weibullverteilung wird der Zusammenhang zwischen der Faserzugfestigkeit und den kritischen Oberflächendefekten untersucht. Um den Einfluss der Faseroberflächenbehandlungen auf die Oberflächenenergien und Grenzflächenhaftung zu ermitteln, werden in dieser Arbeit der Schlichteauftrag aus wässriger Phase (Silan, Filmbildner), Plasmabehandlungen in verschiedenen Medien, Excimer-UV-Bestrahlungen in Anwesenheit verschiedener Monomeren und eine Säurebehandlung durchgeführt. Zur Charakterisierung der Oberflächentopografie der oberflächenbehandelten Fasern vor und nach dem Einzelfaserauszugversuch wird die Rasterkraftmikroskopie (AFM) verwendet. Der Effekt einer Plasmabehandlung auf die freie Oberflächenenergie der PBO-Fasern und die Grenzflächenscherfestigkeit wird mittels der Kontaktwinkelmessung und der Einzelfaserauszugprüfung untersucht. Um die durch diese Oberflächenmodifizierungen hervorgerufenen Veränderungen der mechanischen Verbundeigenschaften sowie der Faser-Matrix-Haftung zu charakterisieren, werden in dieser Arbeit sowohl endlosfaserverstärkte thermoplastische und duroplastische Unidirektionalverbunde bzw. kurzfaserverstärkte thermoplastische Verbunde als Modellfälle betrachtet, bei denen sowohl die Verstärkungsfasern als auch die Matrix signifikant unterschiedlich sind. Zur Verstärkung werden zwei ausgewählte Fasermaterialien (Basalt- und PBO-Fasern) und als Matrix zwei Thermoplaste (PP und PA6) sowie ein Epoxidharz ausgewählt. Der Einsatz von Commingling-Hybridfäden zur Entwicklung der thermoplastischen Unidirektionalverbunde erfordert Voruntersuchungen zur Lufttexturierung mit verschiedenen Düsen und Auswahl der günstigsten Prozessparameter.

O câncer de mama tem motivado pesquisas de avaliação e intervenção psicológica pelos altos índices de mulheres acometidas pela doença, por ser o segundo tipo de câncer mais comum entre as mulheres no mundo e também responsável pelo maior número de mortes. As pacientes com câncer de mama enfrentam o sofrimento psíquico com o diagnóstico e as vicissitudes do tratamento oncológico, necessitando de ajuda psicológica urgente. Definiu-se como objetivo geral desta pesquisa investigar os efeitos terapêuticos da Psicoterapia Breve Operacionalizada (PBO) no atendimento de mulheres diagnosticadas com câncer de mama e em tratamento oncológico. Como objetivos específicos este estudo pretende averiguar os efeitos da técnica da PBO nas situações-problema localizadas nos setores adaptativos e verificar a eficiência da PBO nas situações de crise adaptativa. A pesquisa foi delineada pelo método misto e as participantes foram 17 mulheres, com idade entre 30 e 65 anos, que estavam em tratamento num ambulatório de oncologia do Grande ABC Paulista. Os instrumentos utilizados foram: entrevista clínica preventiva; Escala Diagnóstica Adaptativa Operacionalizada (EDAO) para avaliação da adaptação, antes e após a intervenção psicológica breve e no follow-up; e a PBO. Os resultados mostraram na avaliação inicial que 17,5% das participantes estavam com adaptação ineficaz grave (grupo 5), 53% estavam com adaptação ineficaz severa (grupo 4), 17,5% com adaptação ineficaz moderada (grupo 3) e 13% com adaptação ineficaz leve (grupo 2), sendo que 41,2% estavam em crise adaptativa por perda; o setor Orgânico foi o mais comprometido, seguido do Afetivo-Relacional com soluções pouquíssimo adequadas. A situação-problema da maior parte das participantes estava relacionada ao câncer de mama, o que na compreensão psicodinâmica mostrou-se associada ao intenso desamparo egóico diante do adoecimento e tratamento oncológico. Na avaliação adaptativa final e follow-up, 82,4% das participantes apresentaram evolução de grupo adaptativo. Concluímos que a PBO se mostrou eficiente em todas as idades, estado civil, escolaridade, tempo de diagnóstico, fase de tratamento oncológico e tipo de cirurgia (mastectomia radical ou parcial) e a técnica da interpretação teorizada mostrou-se eficiente para a solução das situações-problema e da crise adaptativa por perda. A motivação, a aliança terapêutica e a transferência positiva foram fundamentais para as participantes no aproveitamento das sessões / Breast cancer has motivated research of evaluation and psychological intervention by the high rates of women affected by the disease, because it is the second most common cancer among women worldwide and also responsible for more deaths. Patients with breast cancer face the psychological suffering with diagnosis and the events of cancer treatment, requiring urgent psychological help. Thus this research had as a general objective investigate the therapeutic effects of Brief Psychotherapy Operationalized (PBO) in the care of women diagnosed with breast cancer and cancer treatment. And the specific objectives were to investigate the effects of PBOs technique in problem-situations located in adaptive sectors and verify the efficiency of the PBO in situations of adaptive crisis. The research was outlined by the mixed method and the participants were 17 women aged 30 to 65, who were being treated in an oncology outpatients clinic in São Paulo. The instruments used were: preventive clinical interview, Adaptative Operational Diagnostic Scale (EDAO) for evaluation of adaptation before and after the brief psychological intervention and follow-up; and the PBO. The results showed in the initial evaluation that 17,5% of participants were in ineffective adaptation serious (group 5), 53% were in ineffective adaptation severe, 17,5% ineffective adaptation moderate and 13% ineffective adaptation light, whereas 41,2% were in the adaptative crisis by loss; the Organic sector was the most committed, followed by the Affective-Relational with solutions very little adequate. The problem-situation of most participants was related to breast cancer, which in psychodynamic understanding was associated to the intense helplessness ego in the face of illness and cancer treatment. In the final adaptive evaluation and follow-up, 82,4% of participants presented evolution of adaptive group. We concluded that the PBO was efficient at all ages, marital status, scholarity, time of diagnosis, cancer treatment stage and type of surgery (radical and partial mastectomy) and the technique of interpretation theorized proved efficient for the solution of problem- situations and adaptive crisis by loss. The motivation, the therapeutic alliance and positive transference were crucial for the participants in harnessing of the sessions

Zur Erweiterung der Grundlagenkenntnisse für diese beiden bisher wenig genutzten Verstärkungsfasern werden in dieser Arbeit Einzelfaserzugversuche durchgeführt, um den Einfluss der Prüfbedingungen und der Faseroberflächenbehandlungen auf die mechanischen Eigenschaften der Fasern zu charakterisieren. Durch die Analysen der unimodalen und bimodalen Weibullverteilung wird der Zusammenhang zwischen der Faserzugfestigkeit und den kritischen Oberflächendefekten untersucht. Um den Einfluss der Faseroberflächenbehandlungen auf die Oberflächenenergien und Grenzflächenhaftung zu ermitteln, werden in dieser Arbeit der Schlichteauftrag aus wässriger Phase (Silan, Filmbildner), Plasmabehandlungen in verschiedenen Medien, Excimer-UV-Bestrahlungen in Anwesenheit verschiedener Monomeren und eine Säurebehandlung durchgeführt. Zur Charakterisierung der Oberflächentopografie der oberflächenbehandelten Fasern vor und nach dem Einzelfaserauszugversuch wird die Rasterkraftmikroskopie (AFM) verwendet. Der Effekt einer Plasmabehandlung auf die freie Oberflächenenergie der PBO-Fasern und die Grenzflächenscherfestigkeit wird mittels der Kontaktwinkelmessung und der Einzelfaserauszugprüfung untersucht. Um die durch diese Oberflächenmodifizierungen hervorgerufenen Veränderungen der mechanischen Verbundeigenschaften sowie der Faser-Matrix-Haftung zu charakterisieren, werden in dieser Arbeit sowohl endlosfaserverstärkte thermoplastische und duroplastische Unidirektionalverbunde bzw. kurzfaserverstärkte thermoplastische Verbunde als Modellfälle betrachtet, bei denen sowohl die Verstärkungsfasern als auch die Matrix signifikant unterschiedlich sind. Zur Verstärkung werden zwei ausgewählte Fasermaterialien (Basalt- und PBO-Fasern) und als Matrix zwei Thermoplaste (PP und PA6) sowie ein Epoxidharz ausgewählt. Der Einsatz von Commingling-Hybridfäden zur Entwicklung der thermoplastischen Unidirektionalverbunde erfordert Voruntersuchungen zur Lufttexturierung mit verschiedenen Düsen und Auswahl der günstigsten Prozessparameter.

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Orientador: José de los Santos Guerra / Resumo: O presente trabalho tem como objetivo investigar a influência do excesso de PbO na estabilização da fase ferroelétrica do sistema titanato zirconato de chumbo modificado com lantânio, o Pb1-xLaxZr1-yTiyO3 (PLZT), bem como, a influência nas propriedades estruturais e suas correlações com as propriedades microestruturais, dielétricas e ferroelétricas. Cerâmicas e filmes finos de PLZT foram obtidos considerando diferentes composições com simetrias romboédrica e tetragonal, com grupo espacial (R3m) e (P4mm), respectivamente. As composições nominais Pb(0,94)La(0,06)(Zr0,6895Ti0,2955)O3 e Pb(0,94)La(0,06)(Zr0,52205Ti0,46295)O3, foram obtidas sem excesso de PbO e com os excessos 0,02; 0,05; 0,10; 0,15; 0,20 em mols. Os pós-precursores foram preparados por mistura convencional de óxidos, e utilizados para conformação das cerâmicas e para obter a resina precursora utilizada na síntese dos filmes finos. Para o estudo das propriedades estruturais e microestruturais, foram utilizadas as técnicas de difração de raios X (DRX), Espectroscopia Raman, Microscopia Eletrônica de Varredura (MEV) e Espectroscopia de Dispersão de Energia (EDX). As propriedades ferroelétricas e dielétricas foram investigadas a partir da dependência da polarização com o campo elétrico e resposta dielétrica com temperatura, respectivamente. Os refinamentos da estrutura foram obtidos pelo método Rietveld e auxiliaram na obtenção dos parâmetros de estruturais e na determinação da quantidade percentual de cada fase pres... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: The objective of the present work is to investigate the influence of excess PbO on the stabilization of the ferroelectric phase of the lanthanum-modified lead zirconate titanate system, Pb1-xLaxZr1-yTiyO3 (PLZT), as well as the influence on the structural properties and its correlations with microstructural, dielectric and ferroelectric properties. PLZT ceramics and thin films were obtained considering different compositions with rhombohedral and tetragonal structures, with spatial group (R3m) and (P4mm), respectively. The nominal compositions Pb(0,94)La(0,06)(Zr0,6895Ti0,2955)O3 and Pb(0,94)La(0,06)(Zr0,52205Ti0,46295)O3, were obtained with no excess of PbO and with excesses in mols 0,02; 0,05; 0,10; 0,15; 0,2. The precursor powders were prepared by conventional mixing of oxides, and used for conformation of the ceramics and to obtain the precursor resin used in the synthesis of the thin films. For the study of the structural and microstructural properties, X-ray diffraction (XRD), Raman Spectroscopy, Scanning Electron Microscopy (SEM) and Energy Dispersion Spectroscopy (EDS) were used. The ferroelectric and dielectric properties were investigated from the dependence of the polarization with the electric field and dielectric response with temperature, respectively. The structure refinements were obtained by the Rietveld method and the structural parameters and used to evaluate the percentage amount of each phase present in the compound as a function of excess PbO. The dielec... (Complete abstract click electronic access below) / Doutor

In this study, Mg, Sn, Cd, Bi and Sb containing, five binary, three ternary and two quaternary different alloys to be used in a Valve-Regulated Lead-Acid (VRLA) batteries have been studied in terms of their mechanical and electrochemical properties. The investigated properties are hardness, passivity, corrosion rate, hydrogen gassing and the conductivity of the passive film. All electrochemical tests were carried out in 3.75 M H2SO4 solution by using open-circuit potential, anodic polarization, polarization resistance measurement and gas collection techniques. The results showed that while the minimum hardness values were observed in Pb and Pb-Bi alloy, Mg containing alloys have the highest hardness values among all alloys. According to corrosion measurements, lowest icritical value was obtained for Pb, Pb-Bi and Pb-Sn, which reached to passivation region earlier than others. Passive film formation was seen for all specimens. The noble Ecorr value and minimum corrosion rates belonged to Pb and Pb-Mg. Pb-Bi and Pb-Cd have the highest gas evolution rate. Besides, there were not seen much difference in the gassing behavior of Pb-Sn and Pb-Sb alloys. Mg is found to have a superior effect on hydrogen gassing. Addition of Sn, as an alloying element, to lead increases the conductivity of the passivation layer. Mg containing alloys did not show good conductivity characteristic. As a result, Mg containing alloy seemed to have an important role because of the desired hardness, corrosion and, gas evolution behavior. However, conductivity of passivation layer of these alloys came up to be low due to the higher tendency of Mg to oxidation. Even so, Mg seems to be a promising alloying element for lead grid alloys in Valve-Regulated Lead-Acid (VRLA) batteries.

Silver and palladium can be found in the so called palladium-ceramics which comes from catalyst production. These valuable metals needs to be recovered from these wastes in order to further increase both the environmental and economic sustainability of our society. This material has also been suspected of causing some problems at Boliden’s smelter Rönnskär during the silver smelting. Unfortunately due to the nature of massive economics at work in precious metal production there has not been much published work around this subject. Therefore this works seeks to increase the understanding of how this waste affects the A-slag in the precious metal production at Rönnskär.   This work takes a look at how certain fluxes and temperatures affects the slag and metal phases, as well as how increasing the addition of the palladium-ceramic affects the melt. It does so by making screening tests with a basic setup of slag from the process, silver granules and additions of coke and sodium carbonate at different temperatures.   The results show that using a reducing environment by adding coke does increase the recovery of the precious metals. Increasing the temperature of the melt also shows an improvement in the recovery of the precious metals.  Furthermore the basis to an alternative way of using this material, consisting of smelting it together with silver and fluxing materials has been suggested in this work in order to eliminate the possible problems it causes in the current process. / Silver och palladium kan finnas i materialet som kallas katalysatormassa som kommer från framställningen av katalysatorer. Dessa värdefulla metaller måste återvinnas från detta avfall för att öka hållbarheten i vårt samhälle både miljömässigt och ekonomiskt. Materialet har också varit en möjlig orsak till problem vid silversmältningen på Bolidens smältverk, Rönnskär. Tyvärr på grund av den enorma ekonomin kring ädelmetaller och deras produktion har det inte publicerats många artiklar om detta ämne. Därför försöker detta arbete att öka förståelsen av hur detta avfall påverkar A-slaggen hos ädelmetallframställningen på Rönnskär.   Detta arbete undersöker på hur olika flussmedel och temperaturer påverkar slaggen och metallfasen, samt hur en ökad mängd katalysatormassa påverkar smältan. Det görs genom att göra flera testsmältor med en bas med slagg från processen, silvergranuler samt tillsatser av koks eller natriumkarbonat vid olika temperaturer.   Resultaten visar att användandet av en reducerande miljö genom tillsättningen av koks ökar återvinningen av ädelmetallerna. En ökad temperatur på smältan har också visat på en ökad återvinning. Utöver detta så har grunden till ett alternativt sätt att använda sig av materialet tagits fram. Detta alternativ består av att smälta materialet tillsammans med silver och flussmedel och har tagits fram för att undvika möjliga problem i befintlig process.