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pubmed-article:18572576pubmed:dateCreated2008-6-24lld:pubmed
pubmed-article:18572576pubmed:abstractTextIn the present work, the effectiveness of styrene/ethylene-butylene/styrene rubbers grafted with maleic anhydride (MA) and a metallocene polyethylene (mPE) as toughening materials in binary and ternary blends with polypropylene and its nanocomposite as continuous phases was evaluated in terms of transmission electron microscopy (TEM), scanning electron microscopy (SEM), oscillatory shear flow and dynamic mechanical thermal analysis (DMA). The flexural modulus and heat distortion temperature values were determined as well. A metallocene polyethylene and a polyamide-6 were used as dispersed phases in these binary and ternary blends produced via melt blending in a corotating twin-screw extruder. Results showed that the compatibilized blends prepared without clay are tougher than those prepared with the nanocomposite of PP as the matrix phase and no significant changes in shear viscosity, melt elasticity, flexural or storage moduli and heat distortion temperature values were observed between them. However, the binary blend with a nanocomposite of PP as matrix and metallocene polyethylene phase exhibited better toughness, lower shear viscosity, flexural modulus, and heat distortion temperature values than that prepared with polyamide-6 as dispersed phase. These results are related to the degree of clay dispersion in the PP and to the type of morphology developed in the different blends.lld:pubmed
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pubmed-article:18572576pubmed:authorpubmed-author:PastorJ MJMlld:pubmed
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pubmed-article:18572576pubmed:year2008lld:pubmed
pubmed-article:18572576pubmed:articleTitleMorphological, rheological and mechanical characterization of polypropylene nanocomposite blends.lld:pubmed
pubmed-article:18572576pubmed:affiliationDepartmento de Mecánica, GPUSB, Universidad Simón Bolívar, Apartado 89000, Caracas 1080A, Venezuela.lld:pubmed
pubmed-article:18572576pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:18572576pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed