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Studies on preparation of PGMA/Al 2 O 3 and its effect on impact strength of epoxy resin
Author(s) -
Wang Ruixin,
Gao Baojiao,
Zhang Yan,
Chen Limei
Publication year - 2009
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.29846
Subject(s) - grafting , epoxy , glycidyl methacrylate , materials science , peroxide , monomer , double bond , polymer chemistry , polymerization , composite material , benzoyl peroxide , chemical engineering , chemistry , polymer , organic chemistry , engineering
In this article, two kinds of methods for grafting polyglycidyl methacrylate (PGMA) onto Al 2 O 3 surface by the radical polymerization initiated by peroxide groups and double bond groups, respectively, were investigated. In the first method, peroxide groups, as initiators, were immobilized onto the Al 2 O 3 surface. Then, GMA was polymerized on Al 2 O 3 under the radicals decomposed by peroxide groups, and PGMA was grafted onto Al 2 O 3 . But in the second method, 3‐methacryloylpropyl trimethoxysilane was chemically bonded onto the Al 2 O 3 surfaces firstly to introduce double bonds. Secondly, the copolymerizations between the immobilized double bonds and the monomer GMA were performed, homopolymerizations of GMA followed, and finally PGMA was grafted to the Al 2 O 3 surfaces. The effects of grafting methods on grafting degree were examined mainly. At the same time, the effects of different grafting conditions on the grafting degree were researched. Furthermore, the effect of the grafted particles PGMA/Al 2 O 3 on impact strength of the epoxy composites was studied. It was found that the grafting degree achieved by the first method was much higher than that by the second, and the grafting degree can reach about 54%. Moreover, the impact strength of epoxy composites containing PGMA/Al 2 O 3 particles were improved largely, and which increased with the grafting degree. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009