CRYSTALLIZATION AND THERMAL-BEHAVIOR OF POLY(D(-)-3-HYDROXYBUTYRATE)-BASED BLENDS

被引：212

作者：

GRECO, P ^{[1
]}

MARTUSCELLI, E ^{[1
]}

机构：

[1] CNR,IST RIC TECNOL POLIMERI & REOL,VIA TOIANO 6,I-80072 NAPLES,ITALY

来源：

POLYMER | 1989年 / 30卷 / 08期

关键词：

Calorimetry - Microscopic Examination - Plastics - Morphology - Polymers - Thermal Properties - Rubber; Synthetic - Molecular Structure;

D O I：

10.1016/0032-3861(89)90219-X

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The influence of molecular structure and characteristics of an uncrystallized rubbery second component (ethylene-propylene rubber (EPR) and poly(vinyl acetate) (PVAc)) on the melt miscibility, phase structure, morphology, thermal and crystallization behaviour of blends based on poly(D(-)-3-hydroxybutyrate) (PHB) has been investigated by differential scanning calorimetry and optical microscopy. PHB and EPR are immiscible in the melt, whereas PHB and PVAc are compatible. Consequently PHB-PVAc blends show a single glass transition and a drastic depression of equilibrium melting temperature of PHB. Conflicting results are obtained when the Flory-Huggins and Kwei-Frisch equations are used to describe and analyse this melting-point depression.

引用

页码：1475 / 1483

页数：9

共 18 条

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