Structure and properties of poly(3-hydroxybutyrate-co-4-hydroxybutyrate) produced by Alcaligenes latus
Structure and properties of poly(3-hydroxybutyrate-co-4-hydroxybutyrate) produced by Alcaligenes latus
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DOI：
10.1007/bf00129382
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发表时间：
1995-06
影响因子：
2.7
通讯作者：
Choong-Kyung Kang;S. Kusaka;Y. Doi
中科院分区：
文献类型：
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作者：
Choong-Kyung Kang;S. Kusaka;Y. Doi
以3-羟基丁酸和4-羟基丁酸的混合碳源为底物，产碱杆菌（Alcaligeneslatus）可合成3-羟基丁酸（3 HB）和4-羟基丁酸（4 HB）的无规共聚物，其组成范围为0 ~ 83mol%4HB。用核磁共振氢谱、碳谱、凝胶渗透色谱和差示扫描量热法对P（3 HB-co-4 HB）的结构和物理性能进行了表征。P（3 HB-co-4 HB）球晶的等温径向生长速率远低于P（3 HB）均聚物的速率。P（3 HB-co-4 HB）膜的酶促降解速率受到共聚物组成的强烈影响。
Random copolymers of 3-hydroxybutyrate (3HB) and 4-hydroxybutyrate (4HB) with a wide range of compositions varying from 0 to 83 mol% 4HB were produced byAlcaligenes latusfrom the mixed carbon substrates of 3-hydroxybutyric and 4-hydroxybutyric acids. The structure and physical properties of P(3HB-co-4HB) were characterized by1H and13C NMR spectroscopy, gel-permeation chromatography, and differential scanning calorimetry. The isothermal radial growth rates of spherulites of P(3HB-co-4HB) were much slower than the rate of P(3HB) homopolymer. The enzymatic degradation rates of P(3HB-co-4HB) films by a PHB depolymerase were strongly influenced by the copolymer composition.