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Random and block copolymers as compatibilizers, directly compared
Author(s) -
Hellmann Goetz P.,
Dietz Mathias
Publication year - 2001
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/1521-3900(200106)170:1<1::aid-masy1>3.0.co;2-y
Subject(s) - copolymer , materials science , polystyrene , styrene , phase (matter) , ultimate tensile strength , random phase approximation , block (permutation group theory) , composite material , polymer chemistry , morphology (biology) , polymer science , polymer , mathematics , chemistry , organic chemistry , physics , combinatorics , biology , genetics , condensed matter physics
Abstract Most blends are two‐phase systems that exhibit coarse morphologies with weak interfaces between the phases. It is well known that these blends can be compatibilized by suitably adapted block copolymers is known. Less known is that random copolymers can compatibilize blends as well, forming interphases. In this study, block and random copolymers of styrene and methylmethacrylate were tested in direct comparison, in a blend of polystyrene and polyvinylchloride. The random copolymers are inferior, as regards the phase morphologies, but competitive, as far as the tensile strength is concerned.