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Incorporation of carbon dioxide into soybean oil and subsequent preparation and studies of nonisocyanate polyurethane networks
Author(s) -
Tamami B.,
Sohn S.,
Wilkes G. L.
Publication year - 2004
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/app.20049
Subject(s) - polyurethane , ethylenediamine , soybean oil , amine gas treating , carbon dioxide , materials science , solvent , polyol , stoichiometry , catalysis , epoxidized soybean oil , isocyanate , ultimate tensile strength , yield (engineering) , butylamine , polymer chemistry , chemistry , organic chemistry , chemical engineering , composite material , raw material , food science , engineering
Epoxidized soybean oil was effectively converted to carbonated soybean oil (CSBO) containing five‐membered cyclic carbonates by reaction with carbon dioxide in the presence of tetrabutylammonium bromide as catalyst at 110°C in high yield. CSBO could easily react with di‐ or tri‐ primary amines to give the corresponding nonisocyanate polyurethane networks (NIPUs). A model reaction between CSBO and n ‐butylamine showed the effective ring opening of five‐membered cyclic carbonate moieties in the triglyceride molecules by the amine to form β‐hydroxyurethane systems. NIPUs were further characterized by the three techniques of solvent extraction, dynamical mechanical analysis, and limited tensile testing. The data from these methods confirmed the network character of all materials and also showed how the levels of extractables, Tg, and mechanical properties varied with type of amine and, in the case of ethylenediamine, the effect of stoichiometry. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 883–891, 2004