Submitted by Emanuel Varela Cardoso (emanuel.varela@ufcg.edu.br) on 2018-06-22T18:16:20Z No. of bitstreams: 1 JÉSSICA CAMILLA DA COSTA LIMA – DISSERTAÇÃO (UAEMa) 2016.pdf: 6436164 bytes, checksum: 0eb0aed4e907b380df345b619174c509 (MD5) / Made available in DSpace on 2018-06-22T18:16:20Z (GMT). No. of bitstreams: 1 JÉSSICA CAMILLA DA COSTA LIMA – DISSERTAÇÃO (UAEMa) 2016.pdf: 6436164 bytes, checksum: 0eb0aed4e907b380df345b619174c509 (MD5) Previous issue date: 2016-02-24 / Capes / Com o intuito de superar algumas limitações do poli(ácidolático) (PLA), foi feita sua mistura com o copolímero poli(estireno/etileno-butileno/estireno) (SEBS), em diferentes concentrações e avaliadas diversas propriedades. As blendas contendo 5,10, 15 e 20% em massa do SEBS foram preparadas por extrusão seguida de injeção e caracterizadas por ensaios reológicos, difratometria de raios X (DRX), espectroscopia na região do infravermelho com transformada de Fourier (FTIR), calorimetria exploratória diferencial (DSC), análise térmica dinâmico-mecânica (DMTA), temperatura de deflexão térmica (HDT), propriedades mecânicas e a morfologia foi investigada por microscopia eletrônica de varredura (MEV). Estas propriedades foram avaliadas antes e após tratamento térmico de recozimento. Os resultados de reometria de torque indicaram que as blendas apresentam maior estabilidade quando comparadas ao PLA puro. Em baixas frequências (reômetro oscilatório) o PLA e as blendas PLA/SEBS contendo 5 e 10% de SEBS apresentam um comportamento de fluido newtoniano, já as blendas contendo 15 e 20% apresentam um comportamento de fluido pseudoplástico, observa-se também a presença de dois arcos distintos para todas as blendas, indicando que as fases de PLA e SEBS são imiscíveis. Verifica-se para as blendas PLA/SEBS contendo 15 e 20% de SEBS, há uma mudança na inclinação das curvas, esta mudança indica que as mesmas passam a apresentar um comportamento de pseudo-sólido. Nos padrões de DRX das amostras submetidas ao tratamento térmico de recozimento observa-se um pico intenso e bem definido caracterizando cristalinidade considerável das amostras. As análises de DSC e DMTA indicaram que com tratamento térmico ocorreu o desaparecimento da temperatura de cristalização a frio (Tcc) doPLA. As amostras recozidas apresentaram valores de HDT mais elevados. Observou-se um balanço de propriedades mecânicas, no qual o módulo elástico e a resistência à tração tiveram uma pequena redução para as blendas sem tratamento e aumento destas propriedades com tratamento térmico, enquanto que o alongamento, a tenacidade e resistência ao impacto tiveram aumento significativo para as amostras sem e com tratamento térmico. Os resultados de MEV indicaram que com o aumento da concentração do copolímero observa-se aumento do tamanho médio das partículas, provavelmente devido à ocorrência de coalescência. Os resultados de MEV após tratamento térmico em geral, pode-se observar um refinamento no tamanho médio das partículas 7 dispersas de SEBS que influenciou nas propriedades mecânicas. As blendas estudadas no presente trabalho apresentam propriedades muito atrativas, contendo pequenas quantidades do copolímero sintético. Omaterial desenvolvido advém, em sua maior proporção, de fontes renováveis, contribuindo assim, com o meio ambiente. / In order to overcome certain limitations of poly (lactic acid) (PLA) biopolymer, the same was modified with poly (styrene / ethylene-butylene / styrene)(SEBS) copolymer, and the effect of different content of this copolymer on the properties of the blends, before and after heat treatment, was evaluated. The blends containing 5, 10, 15 and 20 wt% of SEBS were prepared by extrusion followed by injection molding and characterized by rheological measurements, X-ray diffraction (XRD) Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), dynamic mechanical thermal analysis (DMTA) and heat deflection temperature (HDT). The results of torque rheometry indicated that the blends exhibited increased stability compared to pure PLA. At low frequencies (oscillation rheometer) PLA and PLA / SEBS blends containing 5 and 10% of SEBS exhibited a Newtonian fluid behavior, and the blends containing 15 and 20% SEBS showed a shear thinning behavior. It was also observed the presence two distinct arcs for all blends, indicating that the SEBS and PLA phases are immiscible. It was also observed that in the PLA / SEBS blends containing 15 and 20% SEBS, there is a change in the slope of the curves. This change indicates that they begin to present a pseudo-solid behavior. In the XRD patterns of the samples subjected to annealing heat treatment a well-defined intense peak was observed for PLA indicating its considerable crystallinity in the samples. The FTIR analysis pointed out, by the presence of characteristic bands, that the PLA presented higher crystallinity after the annealing heat treatment. The annealed samples showed higher HDT values. There was a balance of mechanical properties, wherein the elastic modulus and the tensile strength proved to be inversely proportional to the content of the copolymer, while the elongation and tenacity were directly proportional to this content. The addition of the copolymer caused a significant increase in the impact strength for samples with and withoutheat treatment. The SEM results showed that when the SEBS copolymer content was increased, an increase in the average particle size of SEBS dispersed phase was observed, probably due to the occurrence of coalescence. SEM results for samples after heat treatment showed a decrease in average size of dispersed particles of SEBS, which affected the mechanical properties. The blend studied in this paper presented very attractive properties, and contains small amounts of the synthetic 9 copolymer. The developed material comes, in its most proportion, from renewable sources, thus contributing to the environment.

Made available in DSpace on 2016-12-08T17:19:35Z (GMT). No. of bitstreams: 1 Tatiana da Cunha Gomes Leitzke.pdf: 2438825 bytes, checksum: 8c0dbce0f01fadf8eb99d5b68ba3e534 (MD5) Previous issue date: 2003-02-27 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / Aiming the development of polymer materials with high toughness, poly(butadiene-coacrylonitrile) rubbers (NBRs), with acrylonitrile (AN) contents varying from 32,9 to 45,7%, were added to poly(styrene-co-acrylonitrile) (SAN) by casting, mini-extrusion and monoscrew extrusion followed by injection molding. Addition of NBR resulted in significant improvements in the impact strength and the elongation at break, that were strongly influenced by the blend composition, the AN contents and the NBR melt viscosities, but the tensile strength is slightly decreased. The best impact strength results (157,1 ± 3.7 J/m) were obtained with a 70/30 (w/w) SAN/NBR blend using NBR with 33,1% of AN and 51 ML 1+4 (100°C), being ca. 700% higher than the values for pure SAN (22,4 ± 1.1 J/m). Differential scanning calorimetry (DSC) measurements indicated a partial miscibility between the copolymers, showing a shifting of the SAN glass transition temperature from 108,1 to 101,7oC for the 70/30 blend with NBR containing 45,7% of AN. This is in agreement with infrared spectroscopy (FTIR) analysis that displayed a significant shift of the dienic band from 967 cm-1 to ca. 1060 cm-1 for all 70/30 blends, suggesting segmental interactions between NBR and SAN. Scanning electron micrographs (SEM) from fracture surfaces revealed homogeneously dispersed spherical elastomeric domains, and the appearance of yielding and/or crazing processes for all blends. The size of NBR domains decreased as the AN content increased, while the number of NBR domains decreased as the melt viscosity increased. From these results it can be concluded that SAN thoughening by the addition of NBR is directly related to the AN content and the melt viscosity of the elastomer, depending on the morphology of the dispersed rubber phase. Higher NBR domain sizes cause better impact strengths, as large rubber particles are more effective in initiating crazing processes. / Com o objetivo de desenvolver materiais poliméricos com elevada tenacidade, borrachas de poli(butadieno-co-acrilonitrila) (NBR), com teores de acrilonitrila variando de 32,9 a 45,7%, foram incorporadas ao poli(estireno-co-acrilonitrila) (SAN), por evaporação desolventes, mini-extrusão e extrusão seguida de injeção. A adição do NBR resultou em um aumento significativo na resistência ao impacto e na deformação na ruptura, que foram fortemente influenciadas pela composição da blenda, pelo teor de acrilonitrila e pela viscosidade dos NBRs, porém, houve a diminuição da resistência à tração. O melhor resultado de resistência ao impacto (157,1 ± 3.7 J/m) foi obtido para a blenda 70/30 (m/m) utilizando NBR com 33,1% de acrilonitrila e 51 ML 1+4 (100°C), um valor cerca de 700% maior que o verificado para o SAN puro (22,4 ± 1.1 J/m). A técnica de calorimetria diferencial de varredura (DSC) indicou uma miscibilidade parcial entre os copolímeros, mostrando o deslocamento da temperatura de transição vítrea do SAN de 108,1 a 101,7ºC para a blenda 70/30 utilizando o NBR com 45,7% de acrilonitrila. Este resultado concorda com a análise de espectroscopia de infravermelho (FTIR), que mostrou um deslocamento significativo da banda da parte butadiênica de 967 cm-1 para 1060 cm-1, para todas as blendas 70/30, sugerindo assim interações segmentais entre o NBR e SAN. A análise da superfície de fratura por microscopia eletrônica de varredura (MEV), revelou homogeneidade dos domínios elastoméricos dispersos na matriz, bem como o aparecimento de microtrincas e/ou deformação plástica para todas as blendas. O tamanho dos domínios de NBR diminui com o aumento do teor de acrilonitrila presente no NBR, enquanto a quantidade de domínios diminui com o aumento da viscosidade. A partir destes resultados conclui-se que a tenacificação do SAN com a adição de NBR está diretamente relacionada com o teor de acrilonitrila e viscosidade do elastômero e depende da morfologia da fase elastomérica dispersa na matriz. Os domínios maiores de NBR proporcionaram melhor resistência ao impacto, sendo que partículas de borracha maioresfavorecem o aparecimento de microtrincas.

Submitted by Maria Eneide de Souza Araujo (mearaujo@ipen.br) on 2017-03-10T14:39:39Z No. of bitstreams: 1 22066.pdf: 9119613 bytes, checksum: 0b28a0c36e553b4d7b70c8a8a0d8d601 (MD5) / Made available in DSpace on 2017-03-10T14:39:39Z (GMT). No. of bitstreams: 1 22066.pdf: 9119613 bytes, checksum: 0b28a0c36e553b4d7b70c8a8a0d8d601 (MD5) / O polímero Acrilonitrila Butadieno Estireno (ABS) é um dos polímeros mais versáteis disponíveis nos dias de hoje. Atualmente o Brasil não produz o ABS, o que limita a indústria brasileira de plásticos a utilizar as variações deste polímero importadas, ofertadas no mercado nacional por distribuidores locais. Este estudo avaliou os efeitos da adição das argilas Cloisite Na® e Branca de Cubati na matriz polimérica ABS e também os efeitos decorrentes do tratamento por radiação ionizante no ABS e nos compósitos ABS/Argila como formas de modificação de um ABS convencional. Visando avaliar a diferença entre uma argila organofílica e uma organofóbica, a argila Branca de Cubati foi organofilizada e a argila Cloisite Na® foi utilizada como recebida. Foram preparados, utilizando uma extrusora dupla rosca, concentrados a 30 % em massa da argila Branca de Cubati, previamente organofilizada e da Cloisite Na® em Estireno Acrilonitrila (SAN). Os concentrados foram adicionados ao ABS a 1, 3 e 5 % em massa das argilas e foram injetados corpos de prova. Parte dos corpos de prova foi submetida à irradiação por feixe de elétrons à uma dose de 600 kGy. Os compósitos irradiados e não irradiados foram caracterizados por meio de ensaios de resistência a tração, resistência a flexão, resistência ao impacto, temperatura de distorção térmica, ponto de amolecimento Vicat, análise de termogravimétrica (TG), difração de raios X e microscopia eletrônica de varredura com emissão de campo (MEVFEG) e a correlação entre os resultados foi discutida. Foram observadas melhorias nas propriedades mecânicas, exceto resistência ao impacto, nos materiais aditivados com as argilas, sendo os melhores resultados obtidos com a argila Branca de Cubati. O tratamento por radiação ionizante favoreceu o processo de reticulação do ABS. / Dissertação (Mestrado em Tecnologia Nuclear) / IPEN/D / Instituto de Pesquisas Energéticas e Nucleares - IPEN-CNEN/SP

O crescimento na geração de rejeitos de equipamentos elétricos e eletrônicos (REEE), legislações mais rigorosas e o valor agregado destes materiais incentivam o desenvolvimento de tecnologias de reciclagem. Contudo, a reciclagem dos componentes poliméricos dos REEE (CP-REEE) precisa superar desafios como a degradação durante o uso e reprocessamento, a presença de diferentes aditivos nos rejeitos e a depreciação de propriedades causada pela mistura não controlada de polímeros. Assim, o objetivo deste trabalho foi desenvolver um estudo sobre a reciclagem mecânica na forma de blendas poliméricas de rejeitos do copolímero acrilonitrila-butadieno-estireno (ABS) e do poliestireno de alto impacto (HIPS), empregando agentes compatibilizantes. No desenvolvimento do trabalho foram realizadas a caracterização dos CP-REEE, análise das propriedades mecânicas, químicas, térmicas e morfológicas dos polímeros e das blendas de ABS/HIPS nas proporções de 1:3, 1:1 e 3:1 com variações na composição dos polímeros reciclados e virgens e por fim, realizado um estudo do envelhecimento foto-oxidativo acelerado de uma blenda ABS/HIPS. Os resultados mostraram que os polímeros ABS e HIPS reciclados ainda apresentam boas propriedades mecânicas e que a presença de agentes compatibilizantes provoca o aumento da tenacidade nas blendas ABS/HIPS. A incorporação de polímeros virgens nos materiais reciclados não promove ganho significativo nas propriedades mecânicas das blendas. Blendas com até 50% de ABS demonstraram ter propriedades próximas às do HIPS, enquanto as blendas com altos teores de ABS não alcançaram valores de propriedades mecânicas similares aos do ABS virgem. O comportamento das propriedades das blendas virgens e recicladas frente ao envelhecimento fotoquímico foi similar, indicando que o material reciclado apresenta grande potencial para aplicações. O estudo de blendas ABS/HIPS de CP-REEE demonstra que o controle da composição das blendas definem a sua aplicação. / The growth in waste electrical and electronic equipment (WEEE) generation, directives more stringent and the aggregate value presents in these waste are encouraging the development of recycling technologies. However, recycling of polymeric components from WEEE (PC-WEEE) must overcome challenges such as degradation during use and reprocessing, the presence of various additives in the waste and the depreciation of properties caused by uncontrolled polymers mixture. The aim of this work was to develop a study of the mechanical recycling in the form blends with of polymeric waste of acrylonitrile-butadiene-styrene copolymer blends (ABS) and high impact polystyrene (HIPS) using compatibilizers. During the study was carried out the characterization of the PCWEEE and mechanical, chemical, thermal and morphological analysis of the polymers and the ABS / HIPS blends in proportions of 1:3, 1:1 and 3:1 with recycled and virgin polymers, as well as a study of the accelerated photo-oxidative aging of the ABS/HIPS blends. The results showed that ABS and HIPS recycled polymers still have good mechanical properties and the presence of compatibilization agents leads to increased toughness in ABS/HIPS blends. The incorporation of virgin polymers in recycled materials does not promote significant gain in the mechanical properties of the blends. Blends with up to 50% ABS have demonstrated to be closer to the HIPS, while blends with high content of ABS did not reach values of mechanical properties similar to the virgin ABS. The mechanical properties of virgin and recycled blends during the photochemical aging were similar, indicating that the recycled material has great potential for applications. The study of ABS/HIPS blends from PC-WEEE demonstrated that control of the blend composition establish their applications.

No description available.

Polyethylene (PE) resins being non-polar in nature and having a high degree of crystallinity have limited miscibility and compatibility when blended with polar polymers. The miscibility and compatibility of these blends are generally worsened when they are prepared by direct injection moulding without a precompounding process. Such situations are commonly encountered in particular by polymer converters when blending colour and/or additive concentrates, commonly known as masterbatches. Typically, masterbatches are mixtures containing high loading of pigments and/or additives predispersed in a suitable solid vehicle (commonly known as carrier) such as a polyethylene resin. These masterbatches are usually used for the colouration of a wide range of polymers and the carrier used must therefore be compatible with these matrix (host) polymers. The preliminary stage of this study involved the investigation of the properties of blends based on high density polyethylene (HDPE) and a range of engineering thermoplastics (ABS, PC, PBT, PA6), prepared by injection moulding. Five different types of compatibilisers namely, ethylene-vinyl acetate (EVA) copolymer, ethylene-methyl acrylate (EMA) copolymer, ethylene-glycidyl methacrylate (E-GMA) copolymer, ethylene-methyl acrylateglycidyl methacrylate (E-MA-GMA) terpolymer and maleic anhydride grafted HDPE (HDPE-g-MAH) copolymer were evaluated with respect to their efficiencies in compatibilising HDPE with the four engineering polymers. The pre-compounded HDPE/compatibiliser binary blends at 2 different blend ratios (1:1 and 3:1) were added at 15 wt% concentration to each engineering thermoplastics and test samples were produced directly by injection moulding. Results of mechanical testing and characterisation of the blends showed that glycidyl methacrylate compatibilisers, E-MA-GMA, in particular have the most universal compatibilising effectiveness for a range of engineering thermoplastics including ABS, PC, PBT, and PA6. Blends compatibilised with E-MA-GMA compatibiliser had the best notched impact performance irrespective of matrix polymer type. The presence of an acrylic ester (methyl acrylate) comonomer in E-MA-GMA resulted in increased polarity of the ii compatibiliser leading to improved miscibility with the polar matrix polymers demonstrated by fine blend morphologies, melting point depression and reduction in crystallinity of the HDPE dispersed phase. The second stage of this study involved the reactive modification of HDPE using a low molecular weight di-functional solid diglycidyl ether of bisphenol A (DGEBA) type epoxy resin compatibilised with HDPE-g-MAH in an attempt to improve its compatibility with ABS, PBT and PA6. The maleic anhydride moieties in HDPE-g-MAH served as reactive sites for anchoring the epoxy moieties while the HDPE backbone was miscible with the HDPE resin. An excessive amount of reactive groups resulted in the formation of crosslinked gels while the addition of EVA co-compatibiliser helped in the reduction of gel content and further improved the dispersion of the epoxy. The effectiveness of epoxy grafted HDPE (with and without EVA co-compatibiliser) in compatibilising ABS/HDPE, PBT/HDPE, and PA6/HDPE was investigated by injection moulding of 5 wt% functionalised HDPE with these matrix polymers into test bars for mechanical testing, and characterisation by differential scanning calorimtery (DSC) and optical microscopy. The reactively functionalised HDPE blends, improved the mechanical properties of ABS and PA6 blends especially with EVA as co-compatibiliser. However, the mechanical properties of PBT blends were unmodified by the functionalised HDPE which was believed to be due to end-capping of the PBT chain-ends by ungrafted epoxy resins.

The theoretical part of this thesis is focused on bulk radical polymerization of styrene, methylmethacrylate, vinyltoluene and paramethylstyrene. It summarizes actual informations about kinetics and performance possibilities of bulk polymerization. Experimental part deals with polystyrene prepolymers preparation by bulk polymerization. The aim is to find optimal conditions for prepolymers preparation. Prepolymers should be usable for subsequent polymerization nearly up to 100% conversion. Conversion values were gravimetrically determined and molecular weights were obtained by viskosity measurements, which were realized by Ubbelohde viscometer. In the experimental part, there were performed simulations targeted on conversion dependence on time. The purpose was a prediction of monomer conversion at a given time during polymerization. Differences between reality and simulation were low in most of cases and the found form of kinetic behavior calculations provides satisfying results. In the conclusion of this thesis was suggested a new procedure for polystyrene prepolymers preparation.

Dan Beaty (1937-2002) was a prolific composer, pianist, researcher, educator, and writer. His large compositional output included chamber works, choral works, songs, orchestral pieces, electronic music, and keyboard works. Beaty was well versed in traditional Western music as well as the more avant-garde and perplexing idioms of the twentieth century. Beaty's compositions reflect the many fascinating, if not always popular, musical trends of his time. His music encompasses styles from serial to jazz, shows compositional influences from Arnold Schoenberg to Indonesian music, and demonstrates thought-provoking and highly intellectual craftsmanship. This document explores several of Beaty's songs through a discussion of the composer's life and compositional process. Songs included in this document are Three Weeks Songs, October, November, A Sappho Lyric, Love Song, That Night When Joy Began, and War Lyrics. This document was written to accompany the author's DMA Lecture-Recital at the University of North Texas. Unfortunately, Beaty's vocal music was never published and is mostly unknown. One goal of the project was to initiate interest in Beaty's songs. Through this document, Lecture-Recital, and additional performances, considerable strides have been made to bring Beaty's songs to new audiences throughout the United States. In addition, the author has received permission from the Beaty family to publish Dan Beaty's songs.

Ce travail concerne l'étude des modifications de nanocharges lamellaires synthétiques (α-ZrP) et de leur influence sur les propriétés mécaniques et barrière aux gaz de nanocomposites à matrice élastomère (SBR). Cette étude s'inscrit dans le cadre de l'amélioration de l'étanchéité des pneumatiques. L'une des originalités de ce travail a résidé dans l'introduction des nanocharges hydrophiles par le biais d'une dispersion aqueuse (slurry), dans la matrice SBR hydrophobe. La première phase de ce travail a consisté à entreprendre plusieurs types de modification des nanocharges afin d'étudier les mécanismes d'intercalation et/ou d'exfoliation des ces dernières dans le slurry. Ces différentes familles de charges modifiées ont été utilisées pour réaliser des nanocomposites selon différentes voies de mise en oeuvre : principalement solvant et latex. Nous avons ensuite étudié l'influence, (i) de la nature des intercalants, (ii) des distances interfoliaires initiales des nanocharges et (iii) des procédés de mise en oeuvre des nanocomposites, sur la morphologie et les propriétés finales des matériaux. Cette étude a montré la synergie de ces trois paramètres et mis en évidence l'importance du contrôle des interactions charges modifiées/matrice sur les propriétés de transport de gaz. Parmi l'ensemble des matériaux synthétisés, nous avons pu mettre en avant une formulation, permettant d'atteindre des propriétés mécaniques et barrière intéressantes. Cette formulation, en voie latex, est basée sur l'utilisation de la charge modifiée aminosilane et de l'agent de couplage Si69 / This work concerns the study of the modification of synthetic lamellar nanofillers (α-ZrP) and their influence on mechanical and gas barrier properties of elastomeric nanocomposites (SBR). This study is part of improving the tire tightness. One of the originalities of this work is the introduction of hydrophilic nanofillers through an aqueous dispersion (slurry) in the hydrophobic SBR matrix. The first step of this work was to undertake several types of nanofiller modifications state in order to study their intercalation/exfoliation mechanisms in a slurry. These different families of modified fillers were then used to make nanocomposites with different ways of implementations: mainly solvent and latex ones. The influence of, (i) the nature of the intercalating agent, (ii) the initial nanofiller interlayer distance and (iii) the nanocomposite implementation processes, on the morphology and final properties of materials were studied. The synergy of these three parameters was demonstrated and the importance of controlling the modified filler/matrix interactions on the gas transport and mechanical properties was also proved. Among all the synthesized materials, a formulation was put forward which allowed to achieve interesting mechanical and barrier properties. This formulation, processed by the latex route, is based on the use of aminosilane modified nanofillers and the Si69 coupling agent

Les objectifs de cette thèse consistent à identifier les morphologies adoptées par des mélanges d’élastomères chargés en noir de carbone, à étudier l’influence de l’introduction de charges sur ces morphologies mais aussi de détecter la localisation de la charge dans ces mélanges. Dans une dernière partie, l’impact de ces différentes structures sur les défauts d’extrusion est abordé. Ces travaux concernent l’étude des coupages caoutchouc naturel / styrene-butadiene rubber (NR / SBR) et polybutadiène / styrene-butadiene rubber (BR / SBR) non vulcanisés. Dans un premier temps, les morphologies adoptées par ces mélanges non chargés ont été identifiées grâce à plusieurs protocoles expérimentaux. L’influence de l’introduction de noir de carbone ainsi que l’étude de la localisation de la charge dans ces mélanges ont constitué une seconde étape dans ces travaux. Aucune localisation préférentielle de la charge n’a été détectée pour ces mélanges. Un système ségrégé a donc été réalisé par la suite. Enfin, le comportement en extrusion de ces mélanges a été simulé par rhéométrie capillaire et des observations de défauts d’aspect ont été faites. La ségrégation du noir de carbone ne semble pas entraîner la création de défauts d’aspect, sauf dans le cas d’une localisation dans la matrice / The purpose of this project is to investigate the morphology of elastomeric blends filled with carbon black, the localization of the filler in these blends and the structure impact on their processing. This work concerns uncured natural rubber / styrene-butadiene rubber (NR / SBR) blends and butadiene rubber / styrene-butadiene rubber (BR / SBR) blends. Firstly, the morphology of these blends unfilled was described by different experimental procedures over the entire composition range. Secondly, the impact of the filler on the morphology and the localization of it on the blends were studied. No preferential localization was observed in our case. Another blend with a segregation was realized. And finally, the processing of these elastomeric blends was simulated by capillary rheology to detect the formation of flow instabilities. Few melt fractures were observed, except when the filler is localized in the matrix