Premium
Characterization of crosslinking of random polymer network by rheological and equilibrium swelling data
Author(s) -
Espinasse I.,
Cassagnau P.,
Bert M.,
Michel A.
Publication year - 1994
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.1994.070541310
Subject(s) - copolymer , swelling , dispersity , materials science , rheology , polymer chemistry , transesterification , polymer , vinyl acetate , ethylene , chemical engineering , composite material , chemistry , organic chemistry , methanol , catalysis , engineering
The transesterification reaction in the molten state of ester groups of ethylene vinyl acetate (EVA) copolymers and ethylene acrylic ester (EMA) copolymers has been used to crosslink the chains of this polymeric system. The relative EVA copolymers (or EMA copolymers) concentration dependence of the network formation by co‐crosslinking of EVA/EMA miscible blends has been assessed. EVA/EMA networks were characterized by swelling experiments, rheological measurements, and determination of the extent of the reaction through a chromatographic technique. All results can be compared in a master curve. The influence of the polydispersity and the microstructure of EVA and EMA samples was put in evidence. On the other hand, a scaling law ( v 2∼ M c −3/5 ) was observed in agreement with predictions of the Flory‐Rhener expression. © 1994 John Wiley & Sons, Inc.