Deakin University
Browse

File(s) under permanent embargo

Enzyme-catalyzed copolymerization of oxiranes with dicarboxylic acid anhydrides

journal contribution
posted on 2005-07-15, 00:00 authored by R Rajkhowa, I K Varma, A C Albertsson, U Edlund
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°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.

History

Journal

Journal of applied polymer science

Volume

97

Issue

2

Pagination

697 - 704

Publisher

Wiley

Location

Chichester, Eng.

ISSN

0021-8995

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2005, Wiley Periodicals

Usage metrics

    Research Publications

    Categories

    No categories selected

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC