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Effect of urea groups on reaction kinetics of polyurethane formation

✍ Scribed by Ning Luo; De-Ning Wang; Sheng-Kang Ying

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
252 KB
Volume
61
Category
Article
ISSN
0021-8995

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✦ Synopsis

Urea-containing polyurethane reaction systems, based on ethylene oxide-capped poly(propy1ene oxide) polyether diol, 1,4-butyldiol, uretonimine liquefied 4,4'-diphenylmethane diisocyanate, and a biurea compound, were used to investigate the effect of urea groups on polyurethane bulk polymerization by using Fourier transform infrared spectroscopy. The biurea compound was a liquid biurea-capped poly(propy1ene oxide) polyether, which can mix well with the polyurethane systems. Catalysis of urea groups was observed clearly regardless of whether organotin catalyst was used. A catalytic mechanism was presented in this paper.

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