Abstract
Aliphatic dithiol-diacid type polythioesters were first enzymatically prepared by the direct polycondensation of hexane-1,6-dithiol and diacid diesters using the immobilized lipase from Candida antarctica (lipase CA). As a typical example, diethyl sebacate and hexane-1,6-dithiol were polymerized using lipase CA in bulk in the presence of molecular sieves 4A to produce the corresponding polythioester with an M̄w of 10 200 in 90% yield. Both the melting and crystallization temperatures of the produced polythioesters were higher when compared to those of the corresponding polyoxyesters. A higher molecular weight polythioester was produced using lipase in a two-step procedure, i.e., cyclization with subsequent ring-opening polymerization.
Original language | English |
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Pages (from-to) | 605-610 |
Number of pages | 6 |
Journal | Macromolecular Rapid Communications |
Volume | 27 |
Issue number | 8 |
DOIs | |
Publication status | Published - 2006 Apr 21 |
Keywords
- Enzymes
- Lipase-catalyzed polymerization
- Polycondensation
- Polythioesters
ASJC Scopus subject areas
- Organic Chemistry
- Polymers and Plastics
- Materials Chemistry