%0 Journal Article
%T Influ¨ºncia do teor de polipropileno modificado com anidrido maleico nas propriedades do nanocomp¨®sito PP/EPDM/argila organof¨ªlica
%A Braga
%A Fernanda C. F.
%A Oliveira
%A Marcia G.
%A Furtado
%A Cristina R. G.
%J Pol¨ªmeros
%D 2012
%I Associa??o Brasileira de Pol¨ªmeros
%R 10.1590/S0104-14282012005000033
%X 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.
%K nanocomposite
%K thermoplastic elastomers
%K organoclay
%K pp-ma.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0104-14282012005000033&lng=en&nrm=iso&tlng=en