Work of fracture of polystyrene/high density polyethylene blends compatibilized by triblock copolymer

Citation
Sc. Tjong et al., Work of fracture of polystyrene/high density polyethylene blends compatibilized by triblock copolymer, J APPL POLY, 77(9), 2000, pp. 2074-2081
Citations number
26
Categorie Soggetti
Organic Chemistry/Polymer Science","Material Science & Engineering
Journal title
JOURNAL OF APPLIED POLYMER SCIENCE
ISSN journal
00218995 → ACNP
Volume
77
Issue
9
Year of publication
2000
Pages
2074 - 2081
Database
ISI
SICI code
0021-8995(20000829)77:9<2074:WOFOPD>2.0.ZU;2-Y
Abstract
The fracture toughening behavior of polystyrene/high density polyethylene b lends compatibilized by 10 wt % of a styrene-ethylene-butylene-styrene trib lock 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 relation ship was observed between the specific total work of fracture and the ligam ent length (L) for a given L range. The results showed that the essential w ork (w(e)) was independent of the tensile rate (R) range of 1-30 mm/min, an d it then decreased considerably when R was increased to 50 mm/min and abov e. However, the nonessential work exhibited a rate independent trend behavi or. 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 w as greater than the width of the sample. Finally, it was also shown that th e w(e) and beta w(P) values for SENT specimens are obviously greater than t hose for DENT specimens. (C) 2000 John Wiley & Sons, Inc.