文献类型：会议论文

英文题名：Fracture characteristics of short glass fibre/maleated styrene-ethylene-butylene-styrene/polypropylene hybrid composite

作者：Tjong, SC; Xu, SA; Li, RKY; Mai, YW

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 & Engn, Shanghai 200237, Peoples R China;[3]Univ Sydney, Ctr Adv Mat Technol, Sydney, NSW 2006, Australia;[4]CUNY, Dept Mfg Engn & Engn Management, Kowloon, Hong Kong, Peoples R China

会议论文集：Conference on Polymers in the 3rd Millennium

会议日期：SEP 02-06, 2001

会议地点：MONTPELLIER, FRANCE

语种：英文

外文关键词：polypropylene; glass fibre; elastomer; maleic anhydride; hybrid composite; drop-weight impact; work of fracture

摘要：Maleated styrene-ethylene-butylene-styrene triblock copolymer (SEBS-g-MA)/polypropylene 20180 and SEBS/PP 20/80 blends reinforced with 30wt% short glass fibres (SGF) were prepared by extrusion and subsequent injection moulding. The impact strength and fracture toughness of the hybrid composites were measured with the instrumented Charpy drop-weight impact test and essential work of fracture (EWF) method. Drop-weight impact measurements showed that the SGF/ SEBS/PP composite exhibits higher impact strength than the SGF/SEBS-g-MA/PP hybrid at low impact speeds. Fibre pull-out was responsible for the improved impact energy of the SGF/SEBS/PP composite subject to low impact velocity. At high impact speeds, the impact energy of the SGF/SEBS-g-MA/PP hybrid was slightly higher than that of the SGF/SEBS/PP composite. This was attributed to localized plastic deformation occurring in the fibre-matrix interfacial region. However, the EWF method revealed that the toughness of the SGF/SEBS-g-MA/PP hybrid was lower than that of the SGF/ SEBS/PP composite. The effect of maleic anhydride (MA) functional groups grafted to SEBS on the fracture behaviour of the SGF/SEBS/PP hybrid composite is discussed. (C) 2002 Society of Chemical Industry.