The influence of matrix viscosity and composition on the morphology, rheology, and mechanical properties of thermoplastic elastomer nanocomposites based on EPDM/PP

Naderi, Ghasem; Lafleur, Pierre G.; Dubois, Charles

doi:10.1002/pc.20495

Cited by 71 publications

(51 citation statements)

References 27 publications

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“…Elastômeros termoplásticos (TPE) à base de polipropileno (PP) e de terpolímero de etileno-propileno-dieno (EPDM) ganharam notoriedade pela facilidade de preparação de compósitos e pela combinação das altas deformações de um elastômero e do processamento de um termoplástico [1] . A adição de cargas em escala nanométrica a essas matrizes poliméricas, tem sido um atrativo potencial em função das características que a carga inorgânica pode apresentar quando bem dispersa no polímero orgânico.…”

Section: Introductionunclassified

Influência do teor de polipropileno modificado com anidrido maleico nas propriedades do nanocompósito PP/EPDM/argila organofílica

Braga

Oliveira²,

Furtado

2012

Polímeros

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Resumo: Neste trabalho foram obtidos nanocompósitos de elastômeros termoplásticos à base de PP/EPDM/argila organofílica pela técnica de intercalação no estado fundido em câmara interna de mistura. Foram preparados concentrados de PP-MA (agente interfacial) e Claytone 40 (argila organofílica) nas proporções de 1:1, 2:1 e 3:1 que posteriormente foram adicionados na matriz PP/EPDM, previamente preparada, mantendo o teor de argila fixo em 5% (em massa). Foram investigadas as propriedades mecânicas de módulo elástico, tração e alongamento na ruptura, reologia e morfologia, a fim de estabelecer a influência da razão PP-MA/argila organofílica no comportamento dos nanocompósitos. Os resultados mostraram que a adição de teores crescentes de PP-MA melhorou a dispersão da argila organofílica na matriz de PP/EPDM. Conforme revelado pela difração de raio X e confirmados pela reometria foram obtidos nanocompósitos com estruturas mistas intercaladas e esfoliadas, que resultaram em maiores valores de módulo e deformação na ruptura. Palavras-chave: Nanocompósito, elastômero termoplástico, argila organofílica, PP-MA. Influence from the Concentration of Interfacial Agent on the Properties of PP/EPDM/Organoclay NanocompositesAbstract: In this work, nanocomposites were prepared with PP/EPDM thermoplastic elastomer and organoclay by melt intercalation in an internal mixture chamber. Masterbatches composed of PP-MA/organoclay in proportions of 1:1, 2:1 and 3:1 were prepared and further added to a PP/EPDM thermoplastic elastomer, keeping the clay content fixed at 5% (by weight). The tensile properties, rheology and the morphology (organoclay dispersion, crystalline structure and crystallinity degree) of nanocomposites were studied to establish the influence of the PP-MA/Organoclay ratio in the system. The results showed that the addition of increasing levels of PP-MA improved the dispersion of organoclay in the PP/EPDM matrix. As revealed in x-ray diffraction and confirmed by rheology measurements nanocomposites were obtained with mixed intercalated and exfoliated structures, resulting in higher tensile modulus and elongation at break. Keywords: Nanocomposite, thermoplastic elastomers, organoclay, PP-MA. IntroduçãoElastômeros termoplásticos (TPE) à base de polipropileno (PP) e de terpolímero de etileno-propileno-dieno (EPDM) ganharam notoriedade pela facilidade de preparação de compósitos e pela combinação das altas deformações de um elastômero e do processamento de um termoplástico [1] . A adição de cargas em escala nanométrica a essas matrizes poliméricas, tem sido um atrativo potencial em função das características que a carga inorgânica pode apresentar quando bem dispersa no polímero orgânico. Esses materiais inorgânicos utilizados como nanocarga (geralmente silicatos em camadas), além de apresentarem elevada razão de aspecto, são suscetíveis a intercalação de macromoléculas e são os mais utilizados em função da fácil disponibilidade e tratamento de superfície [2] . A utilização de baixos teores de organo-argila (≤5%) [3][4][5] é e...

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Section: Introductionunclassified

Influência do teor de polipropileno modificado com anidrido maleico nas propriedades do nanocompósito PP/EPDM/argila organofílica

Braga

Oliveira²,

Furtado

2012

Polímeros

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“…There are several studies on the preparation and the properties of nanocomposites based on polymer blends in the presence or not of compatibilizers [1][2][3][4][5][6][7][8][9]. Blends of polyamides with polyolefins and polyesters are particularly interesting and attractive from an industrial point of view.…”

Section: Introductionmentioning

confidence: 99%

Processing – morphology – property relationships of polyamide 6/polyethylene blend–clay nanocomposites

Scaffaro¹,

Botta²,

Mistretta³

et al. 2013

Express Polym. Lett.

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Abstract. In this work, we studied the effect of the method of preparation and of reprocessing on the morphology and, consequently, on the physical properties of polyamide 6 (PA6)/ high density polyethylene (HDPE)-clay nanocomposite blends in the presence of different compatibilizers. In particular, the nanocomposites were obtained by melt mixing using a corotating twin screw extruder (E1). The blends thus obtained were re-extruded (E2) under the same operating conditions. Moreover, blends with the same final composition were produced using a masterbatch of the compatibilizer with the clay prepared in a separated stage in a batch mixer (MB). All the materials were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffractometry (XRD) analyses. In addition, the rheological behaviour and the, tensile and impact, properties were evaluated. The XRD and TEM analysis showed that re-extrusion slightly improves the morphology of the nanocomposites. A further improvement of the morphology, in terms of lower clay dimension and better dispersion, was observed in the MB blends. The results of the mechanical tests showed that reprocessing (E2) induced an increase of all the properties for all the three systems. A further general increase of the mechanical properties was showed by the MB blends.

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“…Morphology, rheology and mechanical properties of the PP/ethylene-propylene-diene monomer) EPDM/Cloisite polyblend prepared with different viscosities of PP (20, 40%) and EPDM were compared with the properties of similar unfilled mixtures (86).…”

Section: Thermoplastic-elastomer Polymer Blend Nanocompositesmentioning

confidence: 99%

Polyblend Nanocomposites

Feldman¹

2015

Journal of Macromolecular Science, Part A

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Blending polymers is used to obtain products with improved and wider range of properties. A polymer blend or polyblend is a microscopically mixture of two or more polymers. This paper deals with polyblend nanocomposites where one of the components has at least one dimension of the order of nanometer. It covers different groups of nanocomposites depending on the type of the polymer used in such mixtures, mainly:thermoplastic -thermoplastic polymer blend nanocomposites, thermoplastic -thermoset polymer blend nanocomposites, thermoplastic -elastomer polymer blend nanocomposites, biodegradable polymer blend nanocomposites.

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The influence of matrix viscosity and composition on the morphology, rheology, and mechanical properties of thermoplastic elastomer nanocomposites based on EPDM/PP

Cited by 71 publications

References 27 publications

Influência do teor de polipropileno modificado com anidrido maleico nas propriedades do nanocompósito PP/EPDM/argila organofílica

Influência do teor de polipropileno modificado com anidrido maleico nas propriedades do nanocompósito PP/EPDM/argila organofílica

Processing – morphology – property relationships of polyamide 6/polyethylene blend–clay nanocomposites

Polyblend Nanocomposites

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