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Polysiloxane modified epoxy networks. IV. Catalytic effect on fracture behaviors of jointed interpenetrating polymer networks
Author(s) -
Wu ShinYu,
Lee ShiaoLin,
Chang WenLie,
Sung PoHou
Publication year - 2002
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.10429
Subject(s) - epoxy , materials science , composite material , polymer , scanning electron microscope , ultimate tensile strength , catalysis , interpenetrating polymer network , natural rubber , elastomer , chemistry , organic chemistry
Jointed interpenetrating polymer networks of epoxy resin and poly(dimethylsiloxane) (PDMS) are synthesized using PDMS‐α,ω ‐diol as the reactive modifier. We attempt to control the reaction rate and the morphology of the rubber domains by using the acid as the catalyst. According to the scanning electron microscopy results, the morphologies of the acid catalyzed specimens do not show strain‐induced crystallization during the fracture mode due to the homogeneity of the molecule structure. The tensile strengths and moduli decrease when the reaction rate is increased. However, the acid contents have no effect on the fracture energy. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 84: 2352–2357, 2002