Nonisothermal crystallization kinetics of biodegradable random poly(3-hydroxybutyrate-co-3-hydroxyvalerate) and block one

被引：9

作者：

Chanprateep, S

Kikuya, K

Shimizu, H

Seki, S

Tagawa, S

Shioya, S

机构：

[1] Osaka Univ, Grad Sch Engn, Dept Biotechnol, Suita, Osaka 5650871, Japan

[2] Osaka Univ, Inst Sci & Ind Res, Dept Beam Mat Sci, Suita, Osaka 5670047, Japan

来源：

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN | 2003年 / 36卷 / 06期

关键词：

nonisothermal crystallization; P(HB-co-HV); crystallization kinetics;

D O I：

10.1252/jcej.36.639

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The kinetics of nonisothermal crystallization in a novel microbial synthesis of a biodegradable block copolymer poly(3-hydroxybutyrate-co-3-hydroxyvalerate), P(HB-co-HV), in which the mole fractions of 3HV units are 7 and 10 mol%, were studied by differential scanning calorimetry (DSC). The kinetics of the block copolymer under nonisothermal crystallization conditions was analyzed by Ozawa's equation using three different methods. The comparison of nonisothermal crystallization of the block P(HB-co-HV) copolymer, homopolymer polyhydroxybutyrate, PHB, and random P(HB-co-HV) copolymer, in which the mole fractions of 3HV units are 6 and 12 mol%, was performed. It was found that the n values of the block P(HB-co-7% HV) and block P(HB-co-10% HV) are the same as that of PHB, and have been found to be close to 3. The n values of the random P(HB-co-6% HV) and random P(HB-co-12% HV) have been found to be close to 1. It was obvious that the nonisothermal crystallization rate of block polymers was faster than that of random polymers.

引用

页码：639 / 646

页数：8

共 16 条

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