应用化学 ›› 1996, Vol. 0 ›› Issue (6): 42-45.

• 研究论文 • 上一篇    下一篇

聚β-羟基丁酸酯/聚醋酸乙烯酯共混体系的相容性与结晶行为

安玉贤, 董丽松, 邢佩祥, 庄宇钢, 莫志深, 冯之榴   

  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 长春 130022
  • 收稿日期:1996-03-11 修回日期:1996-06-05 出版日期:1996-12-10 发布日期:1996-12-10
  • 基金资助:
    国家科委基础性研究重大关键项目;“高分子凝聚态的基本物理问题研究”项目;中国科学院高分子物理开放实验室基金

Miscibility and Crystallization Behaviour of Poly(β-Hydroxybutyrate)/Poly(Vinyl Acetate) Blends

An Yuxian, Dong Lisong, Xing Peixiang, Zhuang Yugang, Mo Zhishen, Feng Zhiliu   

  1. Polymer Physics Laboratory, Changchun institute of Applied Chemistry, Chinese Academy of Science, Changchun 130022
  • Received:1996-03-11 Revised:1996-06-05 Published:1996-12-10 Online:1996-12-10

摘要: 研究了制样过程对聚β-羟基丁酸酯(PHB)/聚醋酸乙烯酯(PVAc)共混体系的相容性和结晶行为的影响,DSC、SAXS、POM等实验结果表明,PHB/PVAc共混物经溶液成膜后处于分相的状态,PVAc对PHB的结晶能力影响不大,而经熔融处理后,PHB/PVAc共混物则处于相容的均相状态,随PVAc在共混物中含量的增加,PHB的冷结晶温度升高,球晶增长速率下降,织态结构变得不规整。当PVAc的含量高于80%时,PHB失去结晶能力。

关键词: 聚β-羟基丁酸酯, 聚醋酸乙烯酯, 相容性, 结晶行为

Abstract: The miscibility and crystallization behaviour of poly(β-hydroxybutyrate)(PHB)/poly(vinyl acetate)(PVAc) blends,obtained by solution blend with cholroform as solvent,have been investigated using differential scanning calorimetry, polarizing microscopy and small-angle X-ray scattering.It is found that PHB is immiscible with PVAc in such cast film form.The addition of PVAc has no effect on the crystallinity of PHB phase in this case.However,when quenched from the melt,the system is miscible.The addition of PVAc not only affects the crystallinity,but also the cold crystallization peak temperature,isothermal crystallization rate and the structure of its spherulites.

Key words: poly(β-hydroxybutyrate), poly(vinyl acetate), miscibility, crystallization behaviour