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The Preparation of Copolymers Derived from Thiol‐ene/Cationic Systems by Using a Coupling Agent
Author(s) -
Ortiz Ricardo Acosta,
Valdez Aida E. Garcia,
Duarte M. Lydia Berlanga,
Flores Rodolfo Ovando,
Soucek Mark D.
Publication year - 2009
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.200950901
Subject(s) - cationic polymerization , photoinitiator , polymer chemistry , monomer , ene reaction , moiety , bifunctional , methacrylate , copolymer , materials science , photopolymer , thiol , polymer , chemistry , organic chemistry , composite material , catalysis
A bifunctional monomer with methacrylate and epoxycyclohexyl groups linked by a tetramethyldisiloxane moiety was used as a coupling agent for dual photo and thermally polymerizable Thiol‐Ene/cationic systems. The thiol‐ene system included a tetrafunctional thiol, a trifunctional acrylate and a radical photoinitiator while the cationic system comprised a difunctional epoxycyclohexyl monomer and a cationic photoinitiator. It was found that in a first stage the methacrylate group of the coupling agent reacted with the components of the thiol‐ene system rendering a polysulfide with pendant epoxycyclohexyl groups. In a second stage these pendant groups copolymerized with the epoxy monomer by means of a thermal treatment at 120 °C. When the obtained polymers were analyzed by DMA, an increase in the storage modulus was noticed in comparison with the polymers where no coupling agent was added.