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Enzyme‐Catalyzed Synthesis of Hyperbranched Aliphatic Polyesters
Author(s) -
Skaria Sunny,
Smet Mario,
Frey Holger
Publication year - 2002
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/1521-3927(20020301)23:4<292::aid-marc292>3.0.co;2-5
Subject(s) - comonomer , candida antarctica , polymer chemistry , polyester , hydroxymethyl , branching (polymer chemistry) , condensation polymer , copolymer , polymerization , catalysis , lipase , chemistry , ring opening polymerization , organic chemistry , materials science , enzyme , polymer
Hyperbranched aliphatic copolyesters have been prepared by copolymerization of ε ‐caprolactone with 2,2‐bis(hydroxymethyl)butyric acid, catalyzed by immobilized Lipase B from Candida antarctica (Novozyme 435) under mild conditions. Via this novel combination of ring‐opening AB polymerization and AB 2 polycondensation, the degree of branching ( DB ) and, consequently, the density of functional end groups can be controlled by the comonomer ratio in the feed (0 < DB < 0.33).