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Compatibilizing efficiency of copolymer precursors for immiscible polymer blends
Author(s) -
Yu QiYong,
Zhang CaiLiang,
Gu XuePing,
Wang JiaJun,
Feng LianFang
Publication year - 2011
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/app.35357
Subject(s) - copolymer , polymer chemistry , polystyrene , moiety , materials science , isocyanate , styrene , polymer , chemistry , composite material , organic chemistry , polyurethane
An anhydride‐terminated polystyrene (PS‐ b ‐Anh) as a block copolymer precursor and a copolymer (PS‐ co ‐TMI) of styrene (St) and 3‐isopropenyl‐α,α‐dimethylbenzene isocyanate (TMI) as a graft copolymer precursor are chosen to investigate the effect of the type of the copolymer precursor on its compatibilizing and stabilizing efficiency for polymer blends. Results show that during the melt blending of the PS and PA6, the addition of PS‐ b ‐Anh dramatically decreases the size of the dispersed phase domains, irrespective of its molecular weight. This indicates that a diblock copolymer PS‐block‐PA6 (PS‐ b ‐PA6) is formed by a reaction between the terminal anhydride moiety of the PS‐ b ‐Anh and the terminal amine group of the PA6. When PS/PA6 (30/70) blends are annealed at 230°C for 15 min, their morphologies are much more stable in the presence of the PS‐ b ‐Anh block copolymer precursor than in the presence of the PS‐ co ‐TMI graft copolymer precursor. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012