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Volume‐expandable monomer 5,5‐dimethyl‐1,3‐dioxolan‐2‐one: Its copolymerization behavior with epoxide and its applications to shrinkage‐controlled epoxy‐curing systems
Author(s) -
Morikawa Hiroshi,
Sudo Atsushi,
Nishida Haruo,
Endo Takeshi
Publication year - 2005
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.21431
Subject(s) - copolymer , epoxide , curing (chemistry) , polymer chemistry , monomer , epoxy , ether , materials science , polymerization , shrinkage , polymer , chemistry , organic chemistry , catalysis , composite material
The copolymerization of epoxides and a six‐membered cyclic carbonate, 5,5‐dimethyl‐1,3‐dioxan‐2‐one (DM6CC), was carried out with 1,8‐diazabicyclo[5.4.0]undec‐7‐ene as an initiator. In the copolymerization of glycidyl phenyl ether (GPE) and DM6CC, DM6CC remarkably accelerated the polymerization rate of GPE and also effectively suppressed chain‐transfer reactions, which occur in the homopolymerization of the epoxide. This suppression resulted in the formation of the corresponding copolymer with a higher molecular weight. Similar effects of DM6CC were also observed in a curing system with a Novolac‐type multifunctional epoxide (Novolac glycidyl ether). The curing reaction of the epoxide in the presence of DM6CC smoothly proceeded and yielded the corresponding networked polymer, showing a decrease in the volume shrinkage as the DM6CC content increased. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 96: 372–378, 2005