Autor: John L. Cawse, Richard H. Still, John L. Stanford
Rok vydání: 1984
Předmět:
Zdroj: Die Makromolekulare Chemie. 185:709-723
ISSN: 0025-116X
DOI: 10.1002/macp.1984.021850409
Popis: Novel furan-based diisocyanates (2a – c) were reacted with 1-butanol and basic kinetic studies were made. The results were compared with those obtained from 4,4′-methylenediphenylene diisocyanate (1) under similar conditions. The kinetics of these model reactions were found to be complex even in the presence of added catalysts. The isocyanates 2 studied, were shown to behave as benzylic type compounds with reactivities intermediate between those of aryl and alkyl diisocyanates. Comparative studies were made on segmented copolyurethanes prepared from 1 and from a furfuryl diisocyanate 2a having structural similarity to 1. The diol components used in these studies were 1,4-butanediol and polytetrahydrofuran. The segmented co-polyurethanes prepared from the furfuryl diisocyanate can thus be derived from a single naturally occurring source material, namely furfuraldehyde. These polymers were shown by differential scanning calorimetry and dynamic mechanical analysis to possess properties comparable to analogous copolyurethanes derived from oil-based sources.
Databáze: OpenAIRE
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