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Photopolymer morphology: Phase separation during polymerization
Author(s) -
Maerov S. B.
Publication year - 1985
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.1985.070300415
Subject(s) - tmpta , photopolymer , materials science , polymerization , monomer , trimethylolpropane , copolymer , phase (matter) , polymer chemistry , chemical engineering , styrene , morphology (biology) , dielectric , composite material , chemistry , polymer , organic chemistry , optoelectronics , acrylate , biology , polyurethane , engineering , genetics
Morphology and phase structure were studied before and after photopolymerization for the binder–monomer system: poly(styrene/ sec ‐butylmaleate)(50/50)–trimethylolpropane triacrylate (TMPTA)(75/25). Films supported on a suitable substrate were measured by dynamic mechanical analysis and by dielectric relaxation before and during photocrosslinking. Such film support techniques also allow a variety of physical and chemical treatments to be carried out to determine structure changes. Two phases and a secondary transition were identified. The shift in temperature of both T g 's during photopolymerization and concurrent, fracture‐surface electron photomicrography were consistent with a mechanism involving phase separation of TMPTA during polymerization. Probable composition of the phases is discussed.