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Work of fracture of polystyrene/high density polyethylene blends compatibilized by triblock copolymer
Author(s) -
Tjong S. C.,
Xu S. A.,
Li R. K. Y.
Publication year - 2000
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/1097-4628(20000829)77:9<2074::aid-app25>3.0.co;2-#
Subject(s) - copolymer , materials science , high density polyethylene , polystyrene , polyethylene , composite material , polymer blend , polymer chemistry , fracture (geology) , polymer science , polymer
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 (β 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 β w P values for SENT specimens are obviously greater than those for DENT specimens. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 77: 2074–2081, 2000