%0 Journal Article
%T Nanocomp¨®sitos de polietileno/argila bentonita nacional: influ¨ºncia da argila e do agente compatibilizante PE-g-MA nas propriedades mecanicas e de inflamabilidade
%A Brito
%A Gustavo F.
%A Oliveira
%A Amanda D. de
%A Ara¨²jo
%A Edcleide M.
%A Melo
%A Tom¨¢s J. A. de
%A Barbosa
%A Renata
%A Ito
%A Edson N.
%J Pol¨ªmeros
%D 2008
%I Associa??o Brasileira de Pol¨ªmeros
%R 10.1590/S0104-14282008000200015
%X high density polyethylene/national bentonite clay nanocomposites were prepared with the melt intercalation technique. the effect of the clay without treatment and clay treated with quaternary ammonium salt cetremide with polyethylene-graft-maleic anhydride as coupling agent was evaluated. the systems were characterized by flammability, mechanical and rheological properties, x ray diffraction and transmission electron microscopy. in general, the results of x ray diffraction and transmission electron microscopy showed partially exfoliated and/or intercalated structures with higher tensile modulus and torque value. the flammability test showed that the addition of clay in the polymer matrix and pe-g-ma reduced the burning rate, indicating an improved flammability resistance of the nanocomposites. in general, the system containing pe-g-ma coupling agent led to partially exfoliated nanocomposites with higher thermal stability than the high density polyethylene matrix. the polyethylene-graft-maleic anhydride promoted the exfoliation of clay and adhesion between matrix and filler, thus resulting in enhanced mechanical properties.
%K nanocomposites
%K polyethylene
%K national bentonite clay
%K flammability.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0104-14282008000200015&lng=en&nrm=iso&tlng=en