| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5203378 | Polymer Degradation and Stability | 2010 | 4 Pages |
Abstract
Polyhydroxyalkanoate (PHA) copolymers consisting of (R)-3-hydroxybutyrate (3HB) and medium-chain-length (R)-3-hydroxyalkanoate (3HA), P(3HB-co-3HA), are usually solved in chloroform. However, we found that some of the P(3HB-co-3HA) aged for more than 1 month under ambient conditions were not solved in chloroform, but instead swelled when the 3HA fraction was over 14Â mol%. On the basis of differential scanning calorimetry and wide-angle x-ray diffraction analyses, we predicted that swellable P(3HB-co-3HA) contained numerous P(3HB) microcrystals, which may form physical crosslinks between adjacent PHA polymer chains.
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Authors
Takeharu Tsuge, Yoshihiro Hamada, Yoriko Watanabe, Satoshi Tomizawa, Tetsuya Yamamoto, Hideki Abe,