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Toughening of glassy polystyrene through ternary blending that combines low molecular weight polybutadiene diluents and ABS or HIPS‐type composite particles
Author(s) -
Qin J.,
Argon A. S.,
Cohen R. E.
Publication year - 1999
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/(sici)1097-4628(19990404)71:14<2319::aid-app5>3.0.co;2-1
Subject(s) - polybutadiene , materials science , composite material , crazing , volume fraction , composite number , diluent , polystyrene , ternary operation , brittleness , ultimate tensile strength , toughness , polymer , elastomer , volume (thermodynamics) , copolymer , chemistry , physics , quantum mechanics , computer science , nuclear chemistry , programming language
The effectiveness of toughening brittle glassy polymers such as polystyrene (PS) through deformation‐induced plasticization by low molecular weight diluents of polybutadiene (PB) was amply demonstrated in earlier studies. In those applications, surface‐initiated crazes of unusual growth kinetics and stability could produce effective toughening in sheet samples of millimeter thicknesses, but would have been ineffective in more massive parts where crazes could not be initiated in the interiors to promote a plastic response of the entire volume. This shortcoming has now been rectified through the development of ternary blends incorporating into the previous PS/PB blends a critical small volume fraction of ABS‐ or HIPS‐type composite particles that serve to initiate crazes throughout the volume. Thus, we demonstrated in the present study that incorporation of 10% commerical ABS or 20% commercial HIPS into the most effective PS/PB‐3K blend results in tensile toughnesses equal to or exceeding those of commercial ABS or HIPS in full concentration. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 71: 2319–2328, 1999