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Comonomer‐Unit Compositions, Physical Properties and Biodegradability of Bacterial Copolyhydroxyalkanoates
Author(s) -
Feng Lidan,
Yoshie Naoko,
Asakawa Naoki,
Inoue Yoshio
Publication year - 2004
Publication title -
macromolecular bioscience
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.924
H-Index - 105
eISSN - 1616-5195
pISSN - 1616-5187
DOI - 10.1002/mabi.200300092
Subject(s) - comonomer , copolymer , copolyester , monomer , biodegradation , polymer chemistry , chemistry , crystallization , chemical engineering , materials science , polymer , organic chemistry , polyester , engineering
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.