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

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.