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Microstructure and thermal properties of silyl‐terminated polycaprolactone–polysiloxane modified epoxy resin composites
Author(s) -
Liu Pinggui,
He Lihua,
Song Jiangxuan,
Liang Xingquan,
Ding Heyan
Publication year - 2008
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.28292
Subject(s) - materials science , epoxy , diglycidyl ether , composite material , thermal stability , curing (chemistry) , polycaprolactone , composite number , microstructure , bisphenol a , silylation , silane , polymer chemistry , chemical engineering , polymer , organic chemistry , chemistry , catalysis , engineering
With a direct nucleophilic addition between OH groups of polydiol and NCO of a silane, a blend of silyl‐terminated polycaprolactone PCL‐Si and silyl‐terminated polydimethylsiloxane PDMS‐Si oligomer, PCS‐2Si, were firstly prepared, and then blended with a commercial epoxy resin (diglycidyl ether of bisphenol‐A, DGEBA) to form a ternary composite. The formed ternary composites of different content of DGEBA were cured using a polyamidoamine as a curing agent and a sol–gel process at ambient temperature. The microstructures and properties of the cured composites were investigated by SEM, TGA, and energy dispersive spectroscopy. The results showed the compatibility between DGEBA and PDMS increased with increasing content of PCS‐2Si, but higher content of PCS‐2Si resulted in a slight enrichment of silicon in the surface of the cured film. TGA showed that incorporating PCS‐2Si into epoxy resin altered the composites' thermal stability and degradation characteristics. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008