POLY(HYDROXYBUTYRATE) INVIVO - NMR AND X-RAY CHARACTERIZATION OF THE ELASTOMERIC STATE

被引：46

作者：

AMOR, SR ^{[1
]}

RAYMENT, T ^{[1
]}

SANDERS, JKM ^{[1
]}

机构：

[1] UNIV CAMBRIDGE,CHEM LAB,LENSFIELD RD,CAMBRIDGE CB2 1EW,ENGLAND

来源：

MACROMOLECULES | 1991年 / 24卷 / 16期

关键词：

D O I：

10.1021/ma00016a017

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Variable-temperature C-13 NMR relaxation studies of whole cells of Alcaligenes eutrophus show that poly(beta-hydroxybutyrate) (PHB) is an amorphous elastomer in its "native" state within granules. The in vivo T(g) is estimated be around -40-degrees-C. Rotational correlation times and Arrhenius and other kinetic parameters are all consistent with amorphous elastomers that have been well characterized as bulk polymers. X-ray powder diffraction patterns of whole cells confirm that essentially 100% of PHB in its native state is amorphous.

引用

页码：4583 / 4588

页数：6

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