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。
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.
出处
《应用化学》
CAS
CSCD
北大核心
1996年第6期42-45,共4页
Chinese Journal of Applied Chemistry
基金
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
关键词
聚醋聚乙烯醋
相容性
结晶
PHB
poly(β-hydroxybutyrate), poly(vinyl acetate),miscibility,crystallization behaviour
