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Miscibility of poly(styrene‐co‐acrylonitrile) and poly(α‐methyl styrene‐co‐acrylonitrile) with polymethacrylates containing sterically hindered amine groups
Author(s) -
Goh S. H.,
Lee S. Y.,
Siow K. S.,
Pua C. L.
Publication year - 1987
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.1987.070330207
Subject(s) - miscibility , acrylonitrile , materials science , polymer chemistry , copolymer , methyl methacrylate , styrene , methacrylate , amine gas treating , steric effects , alkyl , polymer , organic chemistry , chemistry , composite material
Sterically hindered amine groups were incorporated into poly(methy1 methacrylate) and poly(ethy1 methacrylate) by copolymerizing 2,2,6,6 tetramethylpiperidinyl methacrylate (TPMA) with MMA and EMA. The replacement of the pendant alkyl groups of the polymethacrylates by SHA groups reduced their miscibility with poly(styrene‐co‐acrylonitrile) (SAN) and with poly(α‐methyl styrene‐co‐acrylonitrile) (MSAN). The cloud points of the miscible blends indicated that the effective interaction parameter B of a blend became less negative with increasing TPMA content in the copolymer, and B was more negative for SAN blend than for a corresponding MSAN blend.