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Brittle‐tough transition temperatures in impact tests on rubber‐toughened plastics
Author(s) -
Bucknall Clive B.
Publication year - 1988
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19880160115
Subject(s) - natural rubber , materials science , composite material , toughening , brittleness , polystyrene , izod impact strength test , toughness , relaxation (psychology) , phase transition , glass transition , polymer , ultimate tensile strength , thermodynamics , psychology , social psychology , physics
— In notched impact tests, rubber‐toughened plastics show abrupt transitions in toughness with increasing temperature. Typically, there are two such transitions, one just above the T g of the rubber phase, and the second some tens of degrees higher. The factors affecting the positions of these transitions are discussed. The relaxation behaviour of the rubber phase is a key factor, but rubber content and particle size are also important. Examples of impact transitions in high‐impact polystyrene (HIPS) and toughened nylon are discussed.