BIOSYNTHESIS AND CHARACTERIZATION OF BACTERIAL POLY(3-HYDROXYBUTYRATE-CO-3-HYDROXYPROPIONATE)

被引：37

作者：

NAKAMURA, S

KUNIOKA, M

DOI, Y

机构：

[1] Research Laboratory of Resources Utilization, Tokyo Institute of Technology, Nagatsuta, Midori-ku

来源：

JOURNAL OF MACROMOLECULAR SCIENCE-CHEMISTRY | 1991年 / A28卷

关键词：

D O I：

10.1080/00222339108054378

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

A new copolyester of 3-hydroxybutyrate (3HB) and 3-hydroxypropionate (3HP) was produced by Alcaligenes eutrophus in a nitrogen-free culture solution of 3-hydroxypropionic acid, 1,5-pentanediol, or 1,7-heptanediol. The copolymer composition varied from 0 to 7 mol% 3HP, depending on the type of carbon substrates supplied. The bacterial copolyesters were characterized by H-1 and C-13 NMR, gel permeation chromatography (GPC), and differential scanning calorimetry (DSC). The copolymers were shown to have a random sequence distribution of 3HB and 3HP units by analysis of the 125-MHz C-13 NMR spectra. The melting temperatures (Tm) decreased from 178-degrees-C to 150-degrees-C as the 3HP fraction increased up to 7 mol%. It has been found that the presence of 3HP units in polyesters accelerates the rate of enzymatic degradation.

引用

页码：15 / 24

页数：10

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