Enzyme-catalyzed copolymerization of oxiranes with dicarboxylic acid anhydrides
2005 (English)In: Journal of Applied Polymer Science, ISSN 0021-8995, E-ISSN 1097-4628, Vol. 97, no 2, 697-704 p.Article in journal (Refereed) Published
Ring-opening copolymerizations of the oxiranes glycidyl phenyl ether (GPE) and diglycidyl ether of bisphenol A (DGEBA) with a dicarboxylic acid anhydride [methyl hexahydrophthalic anhydride, nadic anhydride, maleic anhydride (MA), or itaconic anhydride (IA)] were carried out with the lipases Candida cylindracea (CCL), Lipozyme TL-IM (LIM), and Novozyme 435 (N435) as catalysts. The CCL-catalyzed reaction of DGEBA with MA or IA (at a 1:2 molar ratio) at 80 degrees C resulted in only partial curing. We monitored the reactions by Fourier transform infrared spectroscopy and by following the changes in the intensities of carbonyl stretching frequencies of the anhydride and ester groups. The reactivity of the oxirane group in GPE was higher than that in DGEBA; this may have been due to the higher viscosity of DGEBA. The reactivities of the enzymes for the copolymerization of the oxiranes and dicarboxylic acid anhydride were in the order LIM > CCL > N435.
Place, publisher, year, edition, pages
2005. Vol. 97, no 2, 697-704 p.
catalysis, curing of polymers, enzymes, ring-opening copolymerization, succinic anhydride, polymer synthesis, polyesters, biodegradability
IdentifiersURN: urn:nbn:se:kth:diva-14780DOI: 10.1002/app.21827ISI: 000229386800033ScopusID: 2-s2.0-20844451910OAI: oai:DiVA.org:kth-14780DiVA: diva2:332821
QC 20100525 QC 201202212010-08-052010-08-052012-02-21Bibliographically approved