Comparison of 'all trans' enzymatically prepared unsaturated polyesters with chemically synthesized and industrial polyesters

S. Geresh, Y. Gilboa, S. Abrahami, A. Bershadsky

Research output: Contribution to conferencePaperpeer-review

Abstract

In this paper we present a comparison of some of the characteristics of enzymatically prepared 'all trans' unsaturated polyesters with chemically synthesized unsaturated polyesters and with the conventional general purpose polyester. Scanning electron microscopy (SEM), powder X-ray analysis, and differential scanning calorimetry (DSC), as well as a number of standard tests used to determine mechanical properties for this type of polymer, were used in this investigation. It is shown that 'all trans' polyesters obtained by lipase-catalyzed polytransesterifications in acetonitrile have relatively high melting points and high degrees of crystallinity. When compared with the industrial polyester and with chemically prepared unsaturated polyesters under controlled conditions, the properties of the 'all trans' oligomers seem to be a function of the absolute configuration of the double bonds in the macromolecular chain. Interesting results regarding the properties of the polymers obtained from the DSC analyses complement those obtained by other methods.

Original languageEnglish
Pages743-747
Number of pages5
StatePublished - 1 Jan 1991
Event49th Annual Technical Conference -ANTEC '91 - Montreal, Que, Can
Duration: 5 May 19919 May 1991

Conference

Conference49th Annual Technical Conference -ANTEC '91
CityMontreal, Que, Can
Period5/05/919/05/91

ASJC Scopus subject areas

  • Chemical Engineering (all)
  • Polymers and Plastics

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