文献类型：期刊文献

英文题名：Tensile deformation mechanisms of polypropylene/elastomer blends reinforced with short glass fiber

作者：Tjong, Sie Chin[1]; Xu, Shi-Ai[1,2]; Li, Robert Kwok Yiu[1]; Mai, Yiu-Wing[3]

机构：[1]City Univ Hong Kong, Dept Phys & Mat Sci, Kowloon, Hong Kong, Peoples R China;[2]E China Univ Sci & Technol, Inst Polymer Sci & Technol, Shanghai 200237, Peoples R China;[3]Univ Sydney, Sch Aerosp Mech & Mechatron Engn, Ctr Adv Mat Technol, CAMT, Sydney, NSW 2006, Australia

年份：2003

卷号：87

期号：3

起止页码：441

外文期刊名：JOURNAL OF APPLIED POLYMER SCIENCE

收录：;EI(收录号：2003027312623);WOS:【SCI-EXPANDED(收录号:WOS:000179379100013)】；

语种：英文

外文关键词：polypropylene (PP); elastomers; tensile dilatometry; glass fiber; volume strain

摘要：Polypropylene hybrid composites reinforced with short glass fiber (SGF) and toughened with styrene-ethylene butylenes-styrene (SEBS) elastomer were prepared using extrusion and injection-molding techniques. Moreover, hybrids compatibilized with SEBS-grafted maleic anhydride (SEBS-g-MA) and hybrid compatibilized with PP grafted with maleic anhydride (PP-g-MA) were also fabricated. The matrix of the latter hybrid was designated as mPP and consisted of 95% PP and 5% PP-g-MA. Tensile dilatometry was carried out to characterize the fracture mechanisms of hybrid composites. Dilatometric responses showed that the elastic deformation was the dominant deformation mechanism for the SGF/SEBS/PP and SGF/SEBS-g-MA/PP hybrids. However, cavitation deformation prevailed over shearing deformation for both hybrids at the higher strain regime. The cavitation strain resulted from the debonding of glass fibers and from the crazing of the matrix in the SGF/ SEBS/PP hybrid. In contrast, the cavitation was caused by the debonding of SEBS particles from the matrix of the SGF/SEBS-g-MA/PP hybrid. The use of PP-g-MA resulting in elastic deformation was the main mode of deformation in the low-strain region for the SGF/SEBS/mPP and SEBS/ SEBS-g-MA/mPP hybrids; thereafter, shearing appeared to dominate at the higher strain regime. This was attributed to the MA functional group improving the bonding between the SGF and PP. The correlation between fracture morphology and dilatometric responses also is presented in the article. (C) 2002 Wiley Periodicals, Inc.