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Kinetic study of polysulfide‐acrylate click reaction by DEA and DMA
Author(s) -
Zhou Baijie,
Shen Mingxia,
Wang Qingjun,
Chen Qingmin
Publication year - 2011
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1773
Subject(s) - polysulfide , acrylate , curing (chemistry) , catalysis , materials science , amine gas treating , kinetics , activation energy , polymer chemistry , stoichiometry , chemical engineering , copolymer , chemistry , polymer , organic chemistry , composite material , physics , electrode , quantum mechanics , engineering , electrolyte
The curing process of a polysulfide (PSF) with a triacrylate crosslinker in the presence of an amine catalyst at room temperature is a rapid Michael addition. This reaction was monitored by real‐time infrared spectrum (RTIR). The results of the RTIR show that the consumptions of thiol and acrylate are stoichiometric until 80% conversion, indicating the characteristics of a “click” reaction. Dielectric analyzer (DEA) and dynamic mechanical analyzer (DMA) were employed to investigate the curing kinetics from which the activation energies of this curing reaction were obtained and shown to correlate with each other. In addition, the influences of the types and amount of amine catalyst, the different molecular weights of PSFs, and the triacrylate crosslinkers were discussed. Copyright © 2011 John Wiley & Sons, Ltd.