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Crosslinking of Epoxidized Natural Rubber by Dicarboxylic Acids: An Alternative to Standard Vulcanization
Author(s) -
Pire Myriam,
Oikonomou Evdokia K.,
Imber Lucie,
Lorthioir Cédric,
Iliopoulos Ilias,
Norvez Sophie
Publication year - 2013
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.201300053
Subject(s) - vulcanization , natural rubber , materials science , polymer chemistry , solid state , salt (chemistry) , reaction mechanism , dicarboxylic acid , organic chemistry , chemistry , composite material , catalysis
Summary It is demonstrated that epoxidized natural rubber (ENR) may be efficiently crosslinked by dicarboxylic acids in presence of 1,2‐dimethylimidazole. The activation mechanism of the crosslinking involves the formation of an imidazolium dicarboxylate salt. The formation of ester bridges is ascertained by solid‐state NMR spectroscopy. Due to different epoxidation levels, blends of ENRs can be selectively crosslinked, giving rise to semi‐interpenetrated networks.