聚β-羟基丁酸酯/聚醋酸乙稀酯共混物结晶行为的研究  

Crystallization Behaviour of Poly(β-hydroxybutyrate)/PVAc Blends

作　　者：安玉贤[1] 董丽松[1] 莫志深[1] 邢佩祥[1] 冯之榴[1] 

机构地区：[1]中国科学院长春应用化学研究所高分子物理开放实验室

出　　处：《功能高分子学报》1997年第2期213-218,共6页Journal of Functional Polymers

基　　金：国家科委国家基础性研究重大关键项目

摘　　要：以ＤＳＣ，ＰＯＭ，ＷＡＸＤ实验方法研究了聚β－羟基丁酸酯／聚醋酸乙稀酯（ＰＨＢ／ＰＶＡｃ）共混体系的结晶行为。结果表明：随共混物中非晶组份ＰＶＡｃ含量的增加，ＰＨＢ结晶的活化能增大。用Ａｖｒａｍｉ方程处理实验数据，结果表明ＰＶＡｃ的加入对ＰＨＢ结晶的生长方式影响不大，但结晶速率却明显下降。ＷＡＸＤ实验表明，ＰＶＡｃ的加入不影响ＰＨＢ的结晶结构，但微晶尺寸和结晶度却明显变小。偏光显微镜观察结果与ＤＳＣ实验结果基本一致。The crystallization behaviour of poly(β-hydroxybutyrate )/poly(vinyle acetate) blends was studied by DSC, POM and WAXD. The activation energies for PHB crystallization from the melt were calculated,which are higher for the blends than that for the pure PHB.The results of DSC and WAXD indicate that the addition of PVAc has no effect on the nucleation mechanism and crystal structure of PHB, but affacts its crystalline rates, crystallite size and crystallinity.These results are in good agreement with that obtained by polarized optical microscopy technique.

关 键 词：共混物 结晶 PHB PVAC 聚羟基丁酸酯 

分 类 号：TQ325.5[化学工程—合成树脂塑料工业]