The molecular mass distribution of urethane prepolymers based on oligobutadiene diols and 2,4-toluylene diisocyanate

The dependence of the MMD of prepolymers based on oligobutadiene diols and 2,4-toluylene diisocyanate on the conditions of synthesis and functionality of the initial oligomer has been studied theoretically and experimentally. It has been shown that the formation of urethane isocyanates, chain propag...

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Bibliographic Details
Published in:Polymer science USSR 1984, Vol.26 (7), p.1623-1630
Main Authors: Stovbun, Ye.V., Lodygina, V.P., Kuzayev, A.I., Romanov, A.K., Baturin, S.M.
Format: Article
Language:English
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Summary:The dependence of the MMD of prepolymers based on oligobutadiene diols and 2,4-toluylene diisocyanate on the conditions of synthesis and functionality of the initial oligomer has been studied theoretically and experimentally. It has been shown that the formation of urethane isocyanates, chain propagation at temperatures above 50°, as well as side reactions, all occur during prepolymer synthesis. A method of treatment of gel chromatograms of prepolymers is suggested which takes account of the effect of terminal functional groups.
ISSN:0032-3950
1878-268X
DOI:10.1016/S0032-3950(84)80050-7