The objective of this study is to investigate the effects of titanate coupling agents on low density polyethylene (LDPE) and polypropylene (PP) blends and composites in terms of their mechanical and morphological properties. PP and LDPE composites were produced separately in a Brabender internal mixer, and CaCO3 was used as inorganic filler with compositions of 20, 40 and 60 %. PP/LDPE blends were produced in a twin-screw extruder with ratios of 75/25, 50/50 and 25/75. Their composites were prepared with addition of untreated and titanate-treated CaCO3 at 20% filler content. Titanate coupling agent which is appropriate for LDPE, PP and CaCO3 was used to improve the mechanical properties of the blends and composites. For this purpose, &ldquo / Lica 12&rdquo / which is a kind of neoalkoxy organotitanate was used. Two forms of Lica 12 were used: powder form (Capow L12) and pellet form (Caps L12). Samples with and without titanate were prepared and then they were injection molded to make specimens for tensile and impact tests. Tensile fracture surfaces of samples were examined by scanning electron microscopy (SEM). Their mechanical and morphological properties were compared with each other to determine the effects of Lica 12. This study showed that Capow L12 improved strain at break and impact strength of PP/CaCO3 composites and PP/LDPE blends containing 75% and 50% PP. The strain at break value of of PP75 composite with 20% titanate-treated filler increased significantly up to 509% which is the highest value among all blends and composites in this study. Capow L12 exhibited its functions in PP matrix much more effectively than in LDPE matrix.

In this study the effects of compatibilizer type, organoclay type, and the addition order of components on the morphological, thermal, mechanical and flow properties of ternary nanocomposites based on low density polyethylene, LDPE were investigated. As compatibilizer, ethylene/methyl acrylate/glycidyl methacrylate, ethylene/glycidyl methacrylate, and ethylene/butyl acrylate/maleic anhydride / as organoclay Cloisite&amp / #61666 / 15A, Cloisite&amp / #61666 / 25A and Cloisite&amp / #61666 / 30B were used. All samples were prepared by a co-rotating twin screw extruder, followed by injection molding. Before producing the ternary nanocomposites, in order to determine the optimum amount of the organoclay and compatibilizer, binary mixtures of LDPE/organoclay and LDPE/compatibilizer blends with different compositions were prepared. Based on the results of the mechanical tests, compatibilizer and organoclay contents were determined as 5 wt. % and 2 wt % respectively. After that, ternary nanocomposites were prepared with each compatibilizer/organoclay system and characterization of these nanocomposites was performed. Among the investigated addition orders, mechanical test results showed that the best sequence of component addition was (PCoC), in which LDPE, compatibilizer and organoclay were simultaneously compounded in the first run of the extrusion. Considering the ternary nanocomposites, compositions of LDPE/E-MA-GMA/15A, LDPE/E-GMA/15A and LDPE/E-nBA-MAH/30B showed the highest improvement in mechanical properties. According to the DSC analysis, addition of organoclay and compatibilizer does not influence the melting behavior of the compositions and both compatibilizers and organoclay types have no nucleation activity in LDPE. In the X-Ray analysis, the highest increase of the basal spacing for ternary nanocomposites obtained for LDPE/E-BA-MAH/organoclay nanocomposites. This increase was 83 %, 198 %, and 206 % for samples containing 15A, 25A and 30B respectively.

A indústria alimentícia utiliza variados materiais para embalagens, sendo o polietileno de baixa densidade linear (PELBD) um dos materiais de maior importância, por possuir características únicas e adequadas à produção de embalagens. A geração de espécies químicas em embalagens de alimentos vem sendo foco de estudos no mundo. Este controle de compostos é denominado como estudo de Substâncias Não Intencionalmente Adicionadas (NIAS) e tem sua importância justificada pela preocupação com a saúde humana devido à capacidade de contaminação do alimento embalado. Para este estudo foram escolhidas duas resinas PELBD amplamente aplicadas na produção de embalagens alimentícias, analisadas na forma de pellets. As amostras foram nomeadas como PELBD1 e PELBD2 e analisadas antes e após exposição natural e acelerada (estufa a 50°C) de um, dois e três meses. Ambas apresentaram grande aumento no número de NIAS detectadas por Cromatografia Gasosa com detecção de Massas (GC-MS) após envelhecimentos, quando comparadas à resina virgem, chegando a 1100% em PELBD1 e 100% em PELBD2, com surgimento de substâncias oxigenadas e tóxicas. O aditivo antioxidante ativo foi sendo consumido e analisado via Cromatografia Líquida de Alta Eficiência (HPLC) ao longo das exposições, confirmando os efeitos do envelhecimento. Através do Infravermelho por transformada de Fourier (FTIR) foi verificada degradação inicial em PELBD1 exposto por três meses à estufa. Porém, até mesmo em períodos menores de exposição natural, a formação de grupos cromóforos foi comprovada pela análise de cor, onde houve pequeno e gradual aumento do amarelecimento e diminuição da brancura principalmente em PELBD1. Por Cromatografia de Permeação à Gel (GPC), as amostras apresentaram pequena tendência para diminuição de M̅z. Já nas análises de Reometria Rotacional com variação de Frequência (DSR), Índice de Fluidez (IF) e Calorimetria Exploratória Diferencial (DSC), foram observadas mínimas tendências de degradação. Pode-se concluir a partir destes resultados que a maior degradação e produção de NIAS ocorreram em ambiente acelerado. Esta pesquisa trouxe grandes contribuições para futuros trabalhos que envolvam o estudo de NIAS e suas condições de formação. / The food industry uses various packaging materials being linear low density polyethylene (LLDPE) one of the most important materials, have unique features suitable for the production and packaging. The generation of chemical species in food packages has been the focus of research in the world. This control compounds is referred to as study Non-Intentionally Added Substances (NIAS) and has its importance justified by concern human health because of capacity contamination the food packaging. For this study it was chosen two LLDPE resins widely applied in the production of food packaging, analyzed in the form of pellets. The samples were named as PELBD1 and PELBD2 and analyzed before and after natural and accelerated exposure (oven at 50°C) of a two and three months. Both showed huge increase in the number of NIAS detected by Gas Chromatography with Mass detection (GC-MS) after ageing, when compared to virgin resin, reaching of 1100% in PELBD1 and 100% in PELBD2 with the appearance of oxygen substances and toxic substances. The active antioxidant additive was being consumed and analyzed via High-Performance Liquid Chromatography (HPLC), during the exposures, confirming the effects of ageing. For Fourier Transform Infrared (FTIR) was observed in initial degradation PELBD1 exposed for three months in an oven. However, even at under natural exposure periods, the formation of chromophoric groups were confirmed by analysis of color where there was a slight and gradual increase in yellowing and brightness decreased mainly PELBD1. For the Gel Permeation Chromatography (GPC), the samples showed a slight tendency to decrease M̅z. Already in the analysis of Rheometry Rotational Varying Frequency (DSR), Melt Flow Index (MFI) and Differential Scanning Calorimetry (DSC), were observed minimum trends of degradation. It can concluded from these results that the greatest degradation and NIAS production occurred in an accelerated environment. This research has brought great contributions to future work involving the study of NIAS and their conditions of training.

A indústria alimentícia utiliza variados materiais para embalagens, sendo o polietileno de baixa densidade linear (PELBD) um dos materiais de maior importância, por possuir características únicas e adequadas à produção de embalagens. A geração de espécies químicas em embalagens de alimentos vem sendo foco de estudos no mundo. Este controle de compostos é denominado como estudo de Substâncias Não Intencionalmente Adicionadas (NIAS) e tem sua importância justificada pela preocupação com a saúde humana devido à capacidade de contaminação do alimento embalado. Para este estudo foram escolhidas duas resinas PELBD amplamente aplicadas na produção de embalagens alimentícias, analisadas na forma de pellets. As amostras foram nomeadas como PELBD1 e PELBD2 e analisadas antes e após exposição natural e acelerada (estufa a 50°C) de um, dois e três meses. Ambas apresentaram grande aumento no número de NIAS detectadas por Cromatografia Gasosa com detecção de Massas (GC-MS) após envelhecimentos, quando comparadas à resina virgem, chegando a 1100% em PELBD1 e 100% em PELBD2, com surgimento de substâncias oxigenadas e tóxicas. O aditivo antioxidante ativo foi sendo consumido e analisado via Cromatografia Líquida de Alta Eficiência (HPLC) ao longo das exposições, confirmando os efeitos do envelhecimento. Através do Infravermelho por transformada de Fourier (FTIR) foi verificada degradação inicial em PELBD1 exposto por três meses à estufa. Porém, até mesmo em períodos menores de exposição natural, a formação de grupos cromóforos foi comprovada pela análise de cor, onde houve pequeno e gradual aumento do amarelecimento e diminuição da brancura principalmente em PELBD1. Por Cromatografia de Permeação à Gel (GPC), as amostras apresentaram pequena tendência para diminuição de M̅z. Já nas análises de Reometria Rotacional com variação de Frequência (DSR), Índice de Fluidez (IF) e Calorimetria Exploratória Diferencial (DSC), foram observadas mínimas tendências de degradação. Pode-se concluir a partir destes resultados que a maior degradação e produção de NIAS ocorreram em ambiente acelerado. Esta pesquisa trouxe grandes contribuições para futuros trabalhos que envolvam o estudo de NIAS e suas condições de formação. / The food industry uses various packaging materials being linear low density polyethylene (LLDPE) one of the most important materials, have unique features suitable for the production and packaging. The generation of chemical species in food packages has been the focus of research in the world. This control compounds is referred to as study Non-Intentionally Added Substances (NIAS) and has its importance justified by concern human health because of capacity contamination the food packaging. For this study it was chosen two LLDPE resins widely applied in the production of food packaging, analyzed in the form of pellets. The samples were named as PELBD1 and PELBD2 and analyzed before and after natural and accelerated exposure (oven at 50°C) of a two and three months. Both showed huge increase in the number of NIAS detected by Gas Chromatography with Mass detection (GC-MS) after ageing, when compared to virgin resin, reaching of 1100% in PELBD1 and 100% in PELBD2 with the appearance of oxygen substances and toxic substances. The active antioxidant additive was being consumed and analyzed via High-Performance Liquid Chromatography (HPLC), during the exposures, confirming the effects of ageing. For Fourier Transform Infrared (FTIR) was observed in initial degradation PELBD1 exposed for three months in an oven. However, even at under natural exposure periods, the formation of chromophoric groups were confirmed by analysis of color where there was a slight and gradual increase in yellowing and brightness decreased mainly PELBD1. For the Gel Permeation Chromatography (GPC), the samples showed a slight tendency to decrease M̅z. Already in the analysis of Rheometry Rotational Varying Frequency (DSR), Melt Flow Index (MFI) and Differential Scanning Calorimetry (DSC), were observed minimum trends of degradation. It can concluded from these results that the greatest degradation and NIAS production occurred in an accelerated environment. This research has brought great contributions to future work involving the study of NIAS and their conditions of training.

A reciclagem de resíduos sólidos tem se tornado cada vez mais relevante devido a alguns fatores como os impactos ambientais ocasionados com o seu descarte inadequado, ao rigor crescente de legislação específica e ao custo elevado para o gerenciamento apropriado destes resíduos. Na área de materiais poliméricos, os resíduos poliméricos podem ser de origem pósconsumo ou pós-industrial. Alguns rejeitos industriais poliméricos possuem características estruturais ou químicas que impossibilitam o seu reaproveitamento direto no processo que o gerou, como é o caso filmes multicamadas de polietileno de baixa densidade (PEBD) com poliamida 6 (PA6), usados para a produção de embalagens. O presente trabalho teve como objetivo central o reaproveitamento de rejeitos de filmes multicamadas de PEBD com PA6 na forma de blendas recicladas destes polímeros, fazendo uso de agente compatibilizante e variação na composição das blendas com a incorporação de PA6 virgem, a fim de produzir materiais com propriedades adequadas e custo compatível para a aplicação comercial. O desenvolvimento experimental foi dividido em três etapas que consistiram na avaliação do teor mais adequado de agente compatibilizante de fases da blenda (etapa 1), na determinação do comportamento das propriedades das blendas não compatibilizadas em diferentes composições de rejeito do filme multicamada e PA6 virgem (etapa 2) e na associação do uso de compatibilizante com variação das composições das blendas (etapa 3). A partir da execução experimental das atividades das etapas 1 e 2 do trabalho foi possível determinar que o teor de 2,5% do agente compatibilizante polietileno grafitizado com anidrido maleico (PEg- AM) é o mais adequado para compatibilizar as blendas poliméricas e que a maioria das suas propriedades das blendas apresentam um comportamento próximo ao aditivo linear, que leva em consideração somente as propriedades iniciais dos componentes poliméricos PEBD e PA6 isolados. Os diversos materiais gerados no desenvolvimento desta pesquisa apresentam desempenho de propriedades e custo de produção variáveis em função do teor de PA6 nas blendas, que podem viabilizar o uso deste material reciclado em aplicações comerciais específicas. / Recycling of solid waste has been an important issue due to some factors such as environmental damage caused by inappropriate discards, increasing rigor of specific legislation and high cost to the appropriate management of these waste. Polymeric waste can be originated from post-consume or post-industrial sources. Some polymeric waste have chemical or structural characteristics that difficult their direct reuse in the same productive process such as multilayer film of low density polyethylene (LDPE) and polyamide 6 (PA6), which are used for packing. The aim of this work has been the study the mechanical recycling of multilayer films of PEBD and PA6 as PEBD/PA6 blends with adequate properties and compatible cost for commercial applications. The experimental development has been performed in 3 steps, which correspond to evaluation of more adequate content of compatibilizer agent for interface of blends (step 1), determination of behavior of the properties of blends without compatibilizer agent on different compositions of waste form multilayer films (step 2) and production of blends with compatibilizer agent graphitized polyethylene with maleic anhydride (PE-g-MA) (step 3). Has been verified that the content of 2.5% of PE-g-MA is more adequate to be used in the compatibilization of recycled PEBD/PA blends and that the performance of the blends dependents of the content of PA6 in the material. The recycled materials have potential for commercial applications.

Orientadores: João Sinézio de Carvalho Campos, Marco-Aurélio De Paoli / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química / Made available in DSpace on 2018-08-22T19:54:15Z (GMT). No. of bitstreams: 1 Barros_NataliaGarrotede_M.pdf: 8371421 bytes, checksum: b1ace4db177a03ca77cde81260779535 (MD5) Previous issue date: 2013 / Resumo: Considerando a importância da reciclagem, o presente trabalho teve como objetivo apresentar as propriedades mecânicas, térmicas e reológicas do material polimérico obtido a partir do processo de reciclagem de embalagens multicamadas constituídas de poliamida 6 (PA 6), polietileno de baixa densidade (PEBD) e polietileno de baixa densidade linear (PEBDL). Obteve-se o material polimérico processando-se em extrusora mono-rosca as embalagens com compatibilizantes (CP) de polietileno funcionalizado com anidrido maleico (PE-g-AM) e polietileno de alta densidade pósconsumo (PEADpc). As amostras foram preparadas nas composições que variam de 50 a 100% em massa de embalagem aglutinada. O melhor desempenho no ensaio de tração foi obtido com PE-g-AM. Porém, a adição deste CP nas blendas que continham o PEADpc, mostrou-se desnecessária. Os corpos de prova sem PE-g-AM apresentavam delaminações, devido à falta de compatibilidade entre os diferentes materiais. Entretanto, as propriedades de flexão das blendas com PEADpc foram melhores quando comparadas com as que continham PEAD virgem. Estes dados sugerem que grupos polares, originados na degradação oxidativa do polímero pósconsumo, reagiram com grupos polares da poliamida, promovendo melhor compatibilização. As análises de Microscopia Eletrônica de Varredura mostraram que estes compatibilizantes contribuíram para a diminuição do tamanho dos domínios da fase dispersa, resultando em uma mistura mais homogênea. As blendas que continham o polietileno virgem apresentaram um aumento na viscosidade quando o PE-g-AM foi adicionado. De acordo com as propriedades físico-químicas, estes materiais podem ser utilizados, por exemplo, em aplicações na área moveleira, lonas ou vasos / Abstract: Considering the importance of recycling, this study aimed to show mechanical, thermal and rheological properties from recycled multilayers packaging consisted of polyamide 6 (PA6), low density polyethylene (LDPE) and linear low density polyethylene (LLDPE). The polymeric material was processed in a single screw extruder. Two compatibilizers (CP) were applied: polyethylene-graft-maleic anhydride (PE-g-AM) and post-consumer high density polyethylene (PEADpc). Blends were prepared from 50 to 100% of agglutinated packaging. The best tensile properties were obtained with PE-g-AM. However, It is not necessary the addition of this CP in the blends with PEADpc. The specimens without PE-g-AM showed delamination, because of the lack of adherence of different polymeric materials contained in these blends. Nevertheless, the flexural properties of the blends with PEADpc were better than those with virgin PEAD. These results suggested that the polar groups from PEADpc, originated from oxidation process, may have reacted with polar groups from polyamide. The scanning electron microscopy showed a reduction in the size domains of the disperse phase when these CP were used. This produced a more homogeneous mixture. Other characteristic observed is that the addition of PE-g-AM in blends with virgin PEAD appears to increase the viscosity. The materials obtained can be applied, for example, in furniture in general, tarpaulins or vessels / Mestrado / Ciencia e Tecnologia de Materiais / Mestra em Engenharia Química

Microplastic (MP) pollution has recently been recognized as a threat to the biosphere including humans due to its widespread distribution, persistent nature and infinitesimal size. This study focused on the solid phase degradation of microplastic residues (particularly low density polyethylene, LDPE) in water through heterogeneous photocatalysis process by designed photocatalysts of zinc oxide nanorods (ZnO NRs) and platinum nanoparticles deposited on zincoxide nanorods (Pt NPs-ZnO NRs) under visible light irradiation. These photocatalysts were assessed following standard protocol (ISP 10678: 2010), and characterized using SEM, EDX andoptical spectroscopies (UV-VIS and PL). Deposition of Pt-NPs on ZnO NRs for certain minutes has been found optimum that enhanced the photodegradation process about 38% under UV irradiation and 16.5% under visible light irradiation by improving of both electrons-holes pair separation process and visible light absorption. Photocatalytic degradation of LDPE films was confirmed by FTIR spectroscopy, dynamic mechanical analyzer (DMA), optical and electron microscopes. When LDPE film irradiated in presence of Pt-ZnO, degradation was found quicker than ZnO alone of similar concentration which exhibited formation of a large number of wrinkles, cracks and cavities on the film surface. Dynamic mechanical analyzer (DMA) test indicated stiffness and embrittlement of exposed LDPE films in presence of photocatalysts. Thus, the present work provides a new insight about modified catalysts for the degradation of microplastics in water using visible light.

Synthetic antioxidants have traditionally been added directly to food products in a single initial dose to protect against oxidation of lipids and generation of free radicals. Natural antioxidants have been shown to undergo loss of activity and become prooxidants at high concentrations; therefore, a need exists to develop active packaging which can gradually deliver antioxidants in a controlled manner. The objectives of this research were to (1) form and characterize cyclodextrin inclusion complexes with the natural antioxidants, alpha-tocopherol and quercetin, (2) incorporate cyclodextrin inclusion complexes of natural antioxidants into linear low density polyethylene (LLDPE), and (3) measure the release kinetics of inclusion complexes of natural antioxidants from LLDPE into a model food system. Cyclodextrin inclusion complexes of alpha-tocopherol and quercetin were formed by the coprecipitation method and characterized in the solid state by NMR, IR spectroscopy, and thermal analyses. Solid inclusion complex products of alpha-tocopherol:beta-cyclodextrin and quercetin:gamma-cyclodextrin had molar ratios of 1.7:1 as determined by UV spectrophotometry, which were equivalent to 18.1% (w/w) alpha-tocopherol and 13.0% (w/w) quercetin. Free and cyclodextrin complexed antioxidant additives were compounded with a twin-screw mixer into two LLDPE resin types followed by compression molding into films. Release of alpha-tocopherol and quercetin from LLDPE films into coconut oil at 30 °C was quantified by HPLC during 4 weeks of storage. The total release of alpha-tocopherol after 4 weeks was 70% from the free form and 8% from the complexed form averaged across both LLDPE resins. The mechanism by which alpha-tocopherol was released was modified due to its encapsulation inside the beta-cyclodextrin cavity within the LLDPE matrix as indicated by its diffusion coefficient decreasing by two orders of magnitude. Molecular encapsulation of natural antioxidants using cyclodextrins may be used as a controlled release mechanism within polymer food packaging to gradually deliver an effective antioxidant concentration to a food product, thereby, limiting oxidation, maintaining nutritional quality, and extending shelf life. / Ph. D.

Thesis (MSc (Chemistry and Polymer Science))--University of Stellenbosch, 2008. / In this study linear low density polyethylene (LLDPE), a copolymer consisting of ethylene and 1-butene, was fractionated by the use of temperature rising elution fractionation (TREF). These fractions were then analyzed by crystallisation analysis fractionation, 13C NMR, high temperature size exclusion chromatography and DSC. The molecular distribution of the polymer was investigated. It was found that the polymer had a very broad distribution in its chemical composition. From these results it was also clear that the catalysts used for the polymerisation consist out of different active sites, producing chains with different molecular architecture. Subsequently the polymer was fractionated again by TREF and certain fractions were removed and the remaining material recombined. The removed fractions and recombined material were analyzed by 13C NMR, high temperature size exclusion chromatography, DSC and DMA. The results were compared with the bulk material and from this we could conclude the influence of the fractions removed on the material properties. This gave us more information on the influence of the chemical structure of the polymer on its mechanical properties. It was clear that by removing certain fractions with a certain chemical composition, the properties of the polymer are significantly influenced.

As fibras naturais estao ganhando espaco no mercado como materia-prima por apresentarem caracteristicas desejaveis para aplicacoes industriais, por ser um material renovavel, biodegradavel e de baixo custo. Neste sentido, a exploracao da celulose vem crescendo, inclusive no estudo de compositos polimericos reforcados com fibras naturais. Este trabalho visa primeiramente a obtencao de hibridos celulose/oxido de niobio hidratado a partir do tratamento e modificacao do bagaco de cana-de-acucar, e posteriormente a geracao de compositos de matriz de polietileno de baixa densidade (PEBD) e carga de celulose modificada. O Nb2O5.nH2O foi gerado pelo metodo da precipitacao convencional, partindo-se de niobio metalico. Os hibridos foram produzidos nas proporcoes de 10, 20, 30 e 40% de oxido e caracterizados utilizando-se as seguintes tecnicas: difracao de raios X (DRX), espectroscopia de absorcao no infravermelho com transformada de Fourier (FTIR), termogravimetria (TG), calorimetria exploratoria diferencial (DSC) e microscopia eletronica de varredura (MEV). Os resultados indicam que houve boa interacao entre a fibra de celulose e o oxido de niobio hidratado em todas as proporcoes estudadas. Pelas curvas DSC em atmosfera oxidativa pode-se observar que o Nb2O5.nH2O agiu como um agente retardante a chamas. A proporcao do hibrido definida para a geracao dos compositos foi 90Cel/10Nb2O5.nH2O. Inicialmente foram fabricados os compositos reforcados apenas com celulose branqueada, (x)PEBD/(100-x)Cel, com x = 5, 10, 15 e 20, e realizado o estudo de suas propriedades fisico-quimicas: FTIR, TG, DSC, MEV; e dos testes mecanicos. A partir dos dados obtidos definiu-se a proporcao 5% de reforco para a geracao dos compositos reforcados com o hibrido, 95PEBD:5Cel/Nb2O5.nH2O, e tambem com a adicao do agente compatibilizante: polietileno modificado com anidrido maleico (PE-g-AM), 95PEBD:5Cel/Nb2O5.nH2O+5PE-g-AM. A insercao das fibras de celulose a matriz polimerica gera um material mais resistente e rigido e com menor deformacao, assim como a presenca do Nb2O5.nH2O. O PE-g-AM aumenta o valor do modulo elastico. A utilizacao de uma menor granulometria de carga promove uma maior dispersao e uniformidade da celulose da matriz. A dispersao das fibras na matriz dificulta o processo migracao das cadeias moleculares do PEBD, diminuindo o grau de cristalinidade. Os valores de ?Hf mostram que a adicao do inorganico enfraquece a interacao interfacial da matriz com o reforco, diminuindo a ?Hf e a XC. A presenca do Nb2O5.nH2O nos compositos gera um aumento da Tf. / Natural fibers are in prominent position in the researches as raw material for presenting characteristics desirable for industrial applications; it is a renewable material, biodegradable and low cost. Thus, the exploration of cellulose has been growing, including the study of polymer composites reinforced with natural fibers. This study primarily aims to obtain hybrids cellulose/hydrous niobium oxide from the treatment and modification of sugarcane bagasse, and subsequently the generation of composites with matrix of low density polyethylene (LDPE) and modified cellulose as reinforcement. The Nb2O5.nH2O was generated by the conventional precipitation method, starting from niobium metal. The hybrids were produced in proportions of 10, 20, 30 and 40% of oxide and characterized using the following techniques: x-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), thermogravimetry (TG), differential scanning calorimetry (DSC) and scanning electron microscopy (SEM). The results indicated good interaction between the cellulose fiber and niobium oxide hydrate in all ratios studied. For the DSC curves in oxidative atmosphere can be observed that the Nb2O5.nH2O acted as an agent flame retardant. The proportion of the hybrid set for the generation of composites was 90Cel/10Nb2O5.nH2O. Initially were manufactured composites reinforced only with bleached cellulose, (x)LDPE/(100-x)Cel, with x = 5, 10, 15 and 20, and was conducted the study the physicochemical properties: FTIR, TGA, DSC, SEM; and mechanical properties by the tensile tests. According to this results was defined the percentage of 5% for the generation of composites reinforced with hybrid 95PEBD:5Cel/Nb2O5.nH2O, and also with the addition of compatibilizing, polyethylene modified with maleic anhydride (PE-g-MA), 95PEBD:5Cel/Nb2O5.nH2O+5PE-g-MA. The inclusion of cellulose fibers to the polymer matrix creates a material more resistant and rigid and with a smaller deformation, as well as the presence of Nb2O5.nH2O. The PE-g-MA increases the value of elastic modulus. The use of a smaller particle size of load promotes greater uniformity and dispersion of the cellulose in the matrix. The dispersion of fibers in the matrix hinders the migration process of the molecular chains of LDPE, reducing the degree of crystallinity. ZHf values show that the addition of inorganic weakens the interaction at the matrix with the reinforcement, decreasing ZHf and XC. The presence of the Nb2O5.nH2O in composites generates an increase in Tf.