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Comonomer-Unit Compositions, Physical Properties and Biodegradability of Bacterial Copolyhydroxyalkanoates

✍ Scribed by Lidan Feng; Naoko Yoshie; Naoki Asakawa; Yoshio Inoue

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
243 KB
Volume
4
Category
Article
ISSN
1616-5187

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✦ Synopsis

Abstract

Summary: The comonomer‐unit compositions and their distribution of as‐produced bacterial copolyesters, including poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate), poly(3‐hydroxy‐butyrate‐co‐3‐hydroxypropionate), poly(3‐hydroxybutyrate‐co‐3‐hydroxyhexanoate) and poly(3‐hydroxybutyrate‐co‐4‐hydroxybutyrate) are described in this paper. Each copolyester sample can be comonomer‐unit compositionally fractionated into several fractions, indicating that the original copolymers are mixtures of copolymers with different comonomer‐unit compositions. The effects of comonomer‐unit compositional distribution on thermal properties, crystallization, biodegradability and solid‐state phase behavior are investigated using comonomer compositionally fractionated copolymers.

The trend shown by the T~m~ values of the copolymers, P(3HB‐co‐3HV), P(3HB‐co‐3HP), P(3HB‐co‐3HH) and P(3HB‐co‐4HB), plotted against the content of the second monomer unit.

imageThe trend shown by the T~m~ values of the copolymers, P(3HB‐co‐3HV), P(3HB‐co‐3HP), P(3HB‐co‐3HH) and P(3HB‐co‐4HB), plotted against the content of the second monomer unit.

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