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Studies on curing reaction kinetics and properties of the CPE as a modifier of polyester–urethane elastomer
Author(s) -
Liu Jin,
Li Zhen
Publication year - 1996
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/(sici)1097-4628(19961121)62:8<1231::aid-app13>3.0.co;2-a
Subject(s) - curing (chemistry) , elastomer , materials science , polyester , polyurethane , fourier transform infrared spectroscopy , order of reaction , kinetics , polymer chemistry , composite material , chemical engineering , reaction rate constant , physics , quantum mechanics , engineering
Chlorinated polyethylene (CPE)‐modified polyester prepolymers with NCO end groups were synthesized. The chain‐extension reactions of the prepolymers with 3,3′‐dichloro‐4,4′‐diaminodiphenylmethane were studied by Fourier transform infrared spectrometry and found to change from second‐order reaction at lower temperature to first‐order reaction at higher temperature for these reaction systems. The properties of CPE‐modified polyurethane (PU) elastomers was also studied by dynamic mechanical property analysis. The experimental results showed that the CPE content increase would lead to a decrease of the mechanical properties of PU elastomers and result in a prolongation of the cream time of curing reaction systems, but would make the manufacturing process easier than before. It is suggested that the CPE may be selected as a delayed‐action activator of curing reaction. © 1996 John Wiley & Sons, Inc.