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Impact‐resistant plastics from blends of poly(styrene/acrylonitrile) with ϵ‐caprolactone block copolymers
Author(s) -
Clark Earl,
Childers C. W.
Publication year - 1978
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.1978.070220417
Subject(s) - materials science , copolymer , styrene , acrylonitrile , ultimate tensile strength , softening point , acrylonitrile butadiene styrene , caprolactone , gloss (optics) , composite material , compatibilization , izod impact strength test , polymer , polymer chemistry , softening , grafting , chemical resistance , polymer blend , coating
Impact‐resistant resins resembling ABS were prepared by hot mixing poly(styrene/acrylonitrile) and rubbery ϵ‐caprolactone block copolymers in the presence of small amounts of an organic peroxide. Measurements of optical properties and softening temperatures indicate that this discovery is a result of mutual solubility between the poly(styrene/acrylonitrile) and the poly‐ϵ‐caprolactone sequences of the block polymer. Advantages of the blend process over latex grafting include lower nonpolymer residue, better color, and more versatility. Disadvantages are slightly lower softening temperature and less surface gloss. Tensile strength, flexural modulus, oil resistance, and melt flow‐impact strength relationship are similar. Versatility of the blend process was demonstrated in the development of transparent compositions.