文献类型：期刊文献

英文题名：Work of fracture of polystyrene/high density polyethylene blends compatibilized by triblock copolymer

作者：Tjong, S.C.[1]; Xu, S.A.[1,2]; Li, R.K.Y.[1]

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

年份：2000

卷号：77

期号：9

起止页码：2074

外文期刊名：JOURNAL OF APPLIED POLYMER SCIENCE

收录：;EI(收录号：2000385276218);WOS:【SCI-EXPANDED(收录号:WOS:000087900100025)】；

语种：英文

外文关键词：essential work; polystyrene; polyethylene; fracture toughness; ligament length

摘要：The fracture toughening behavior of polystyrene/high density polyethylene blends compatibilized by 10 wt % of a styrene-ethylene-butylene-styrene triblock copolymer (SEBS) was assessed using single-edge notched tension (SENT) and double-edge notched tension (DENT) specimens of various gauge lengths over a wide range of tensile rates. The fracture of DENT and SENT specimens was completely ductile under the plane-stress condition. A linear relationship was observed between the specific total work of fracture and the ligament length (L) for a given L range. The results showed that the essential work (w(e)) was independent of the tensile rate (R) range of 1-30 mm/min, and it then decreased considerably when R was increased to 50 mm/min and above. However, the nonessential work exhibited a rate independent trend behavior. In addition, w(e) and the specific nonessential work of fracture (beta w(P)) were basically independent of the gauge length (G), provided that G was greater than the width of the sample. Finally, it was also shown that the w(e) and beta w(P) values for SENT specimens are obviously greater than those for DENT specimens. (C) 2000 John Wiley & Sons, Inc.