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Effect of Comonomer-Unit Compositional Distribution on Thermal and Crystallization Behavior of Bacterial Poly[(3-hydroxybutyrate)-co-(3-mercaptopropionate)]

✍ Scribed by Fang Yu; Bo Zhu; Tungalag Dong; Yoshio Inoue

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
424 KB
Volume
9
Category
Article
ISSN
1616-5187

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✦ Synopsis

Abstract

The physical properties of novel sulfur‐containing biopolymers, poly[(3‐hydroxybutyrate)‐co‐(3‐mercaptopropionate)]s [P(3HB‐co‐3MP)s], have been investigated in detail by^1^H and ^13^C NMR spectroscopy, wide‐angle X‐ray diffraction (WAXD) analysis, DSC, and FT‐IR spectroscopy. Based on a solvent/non‐solvent (chloroform/heptane) fractionation method, an original P(3HB‐co‐3MP) sample with 3MP unit content of 16.3 mol‐% was fractionated into eight fractions with 3MP unit content ranging from 10.3 to 37.2 mol‐% and number‐average molecular weight from 0.4 × 10^5^ to 2.9 × 10^5^. The thermal and crystallization behavior were found to be greatly affected by the comonomer‐unit composition and its distribution. Furthermore, the 3MP comonomer unit was found to be included in the crystalline phase in some fractions.

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