PMMA‐AES Blends Prepared by <i>in situ</i> Polymerization

Carvalho, Fabiana Pires de; Gonçalves, Maria do Carmo; Felisberti, Maria I.

doi:10.1002/masy.201051078

Cited by 5 publications

(2 citation statements)

References 43 publications

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“…Another factor influenced by in situ polymerization is stereochemistry. In an earlier article, Carvalho et al3 reported the radical polymerization of the poly(methyl methacrylate), PMMA, in the presence of poly(acrylonitrile‐ g ‐(ethylene‐ co ‐propylene‐ co ‐diene)‐ g ‐styrene) (AES), resulting in PMMA with increasing amounts of triad syndiotactic as the AES content in the reaction medium increased.…”

Section: Introductionmentioning

confidence: 99%

Effect of in situ polymerization conditions of methyl methacrylate on the structural and morphological properties of poly(methyl methacrylate)/poly(acrylonitrile‐g‐(ethylene‐co‐propylene‐co‐diene)‐g‐styrene) PMMA/AES Blends

Carvalho

Gonçalves

Felisberti

2011

J of Applied Polymer Sci

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In this study, the structural and morphological properties of poly(methyl methacrylate)/poly (acrylonitrile-g-(ethylene-co-propylene-co-diene-g-styrene) (PMMA-AES) blends were investigated with emphasis on the influence of the in situ polymerization conditions of methyl methacrylate. PMMA-AES blends were obtained by in situ polymerization, varying the solvent (chloroform or toluene) and polymerization conditions: method A-no stirring and air atmosphere; method Bstirring and N 2 atmosphere. The blends were characterized by infrared spectroscopy (FTIR), transmission electron microscopy (TEM), and dynamic mechanical analysis (DMA). The results showed that the PMMA-AES blends are immiscible and present complex morphologies. This morphology shows an elastomeric dispersed phase in a glassy matrix, with inclusion of the matrix in the elastomer domains, suggesting core shell or salami morphology. The occlusion of the glassy phase within the elastomeric domains can be due to the formation of graft copolymer and/or phase inversion during polymerization. However, this morphology is affected by the polymerization conditions (stirring and air or N 2 atmosphere) and by the solvent used. The selective extraction of the blends' components and infrared spectroscopy showed that crosslinked and/or grafting reactions occur on the elastomer chains during MMA polymerization. The glass transition of the elastomer phase is influenced by morphology, crosslinking, and grafting degree and, therefore, T g depends on the polymerization conditions. On the other hand, the behavior of T g of the glassy phase with blend composition suggests miscibility or partial miscibility for the SAN phase of AES and PMMA.

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Section: Introductionmentioning

confidence: 99%

Effect of in situ polymerization conditions of methyl methacrylate on the structural and morphological properties of poly(methyl methacrylate)/poly(acrylonitrile‐g‐(ethylene‐co‐propylene‐co‐diene)‐g‐styrene) PMMA/AES Blends

Carvalho

Gonçalves

Felisberti

2011

J of Applied Polymer Sci

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“…Gonçalves, & Felisberti, 2010; Turchet & Felisberti, 2006). Diante do potencial tecnológico do AES para tenacificar a PA6,…”

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Evolução da morfologia e das propriedades mecânicas de blendas PA6/AES compatibilizadas com EPDM-MA

Silva

Luna

Ferreira

et al. 2021

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Neste trabalho, a poliamida 6 (PA6) foi tenacificada com o terpolímero de acrilonitrila-EPDM-estireno (AES), utilizando o etileno-propileno-dieno enxertado com anidrido maleico (EPDM-MA), como agente compatibilizante. As blendas foram preparadas em uma extrusora de rosca dupla corrotacional e, posteriormente, moldadas por injeção. As propriedades de resistência ao impacto, resistência à tração e a morfologia foram avaliadas. Os resultados indicaram aumentos expressivos na resistência ao impacto das blendas PA6/AES/EPDM-MA, em comparação com a PA6 pura. Contudo, o módulo elástico e a resistência à tração sofreram decréscimos, devido ao aumento da flexibilidade das blendas desenvolvidas. A blenda PA6/AES compatibilizada com 15% de EPDM-MA apresentou-se como um material supertenaz e dúctil na temperatura ambiente. As imagens obtidas por microscopia eletrônica de varredura (MEV) indicaram que o acréscimo no teor do compatibilizante EPDM-MA favoreceu à presença de partículas mais refinadas e bem aderidas na matriz de PA6, estabilizando assim a morfologia da blenda. Em geral, a formulação da blenda PA6/AES/EPDM-MA (60/25/15%) apresentou potencial para aplicação de alto desempenho, com perspectivas para a produção de peças para suprir o mercado da indústria automobilista e da eletrônica.

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Structures and morphologies of in situ polymerized blends of PMMA and ASA

Cocco

Carvalho

Felisberti

2013

J of Applied Polymer Sci

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Blends of poly(methyl methacrylate), PMMA, and the elastomer ASA, a graft copolymer based on poly(acrylonitrile‐co‐styrene) (SAN) and acrylic rubber, were prepared by in situ polymerization and characterized according to structural, mechanical, thermal, and morphological properties. The polymerization conditions, such the presence or absence of a chain transfer agent, stirring and an inert atmosphere, influence the morphological and structural properties of the blends. In spite of the evidences of the partial miscibility between PMMA and SAN phase of the ASA, the blends are heterogeneous and present a complex morphology. The morphology of some PMMA‐ASA blends is made up of an elastomeric dispersed phase in a glassy matrix, with a possible inclusion of the matrix in the elastomeric domains. The selective extraction of the blend components and infrared spectroscopy showed that crosslinking and/or grafting reactions occur on ASA chains during MMA polymerization. The syndiotacticity of PMMA obtained in the presence of ASA increases with the amount of ASA, due to possible interactions between the carbonyl groups of PMMA and the nitrile or phenyl groups of the SAN copolymer. The mechanical properties of the blends were influenced by the compositions of the blends and mainly by the conditions of polymerization. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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PMMA‐AES Blends Prepared by in situ Polymerization

Cited by 5 publications

References 43 publications

Effect of in situ polymerization conditions of methyl methacrylate on the structural and morphological properties of poly(methyl methacrylate)/poly(acrylonitrile‐g‐(ethylene‐co‐propylene‐co‐diene)‐g‐styrene) PMMA/AES Blends

Effect of in situ polymerization conditions of methyl methacrylate on the structural and morphological properties of poly(methyl methacrylate)/poly(acrylonitrile‐g‐(ethylene‐co‐propylene‐co‐diene)‐g‐styrene) PMMA/AES Blends

Evolução da morfologia e das propriedades mecânicas de blendas PA6/AES compatibilizadas com EPDM-MA

Structures and morphologies of in situ polymerized blends of PMMA and ASA

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