Block polymers from isocyanate-terminate
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Richard J. Ambrose; William L. Hergenrother
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Article
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1975
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John Wiley and Sons
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English
⚖ 429 KB
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## Abstract Isoprene–urea and butadiene–urea block polymers have been prepared by reaction of isocyanate‐terminated prepolymers with diamines and diisocyanates. It was found that the per cent of blocked urea in these copolymers is dependent on the isocyanate–diamine stoichiometry. Stress–strain dat