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A rheological method for the study of crosslinking of ethylene acetate and ethylene acrylic ester copolymer in a polypropylene matrix
Author(s) -
Cassagnau P.,
Bert M.,
Verney V.,
Michel A.
Publication year - 1992
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760321504
Subject(s) - materials science , copolymer , ethylene , transesterification , polypropylene , activation energy , ethylene vinyl acetate , ethylene oxide , polymer chemistry , dynamic mechanical analysis , methyl acrylate , butyl acrylate , acrylate , rheology , catalysis , vinyl acetate , reaction mechanism , polymer , composite material , organic chemistry , chemistry
Transesterification may be used to crosslink a copolymer such as ethylene vinyl acetate with poly(ethylene acrylate‐co‐propylene) in the presence of dibutyltin oxide as a catalyst. A rheological study of the mechanism of this exchange reaction has been made: The kinetics of the crosslinking reaction was determined by studying the time and temperature dependence of the dynamic storage modulus G ′( t , T ) ω . Kinetic curves obtained for different reactive blends (EVA, PP/EVA, and PPf/EVA) allowed for the evaluation of the activation energy of the reaction and, thus, specified the appropriate parameters (temperature and time) for carrying out this reaction in a molten state.