| 成核剂对PHBV等温结晶行为的影响 |
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| 引用本文： | 刘万军,刘景江,董丽松,杨慧丽,王茁.成核剂对PHBV等温结晶行为的影响[J].高分子学报,2001,9(5):645-649. |
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| 作者姓名： | 刘万军 刘景江 董丽松 杨慧丽 王茁 |
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| 作者单位： | 1. 中国科学院长春应用化学研究所
2. 吉林工业大学应用化学系 |
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| 摘 要： | 用DSC方法测定了氮化硼及滑石粉成核剂对 (β 羟基丁酸酯 与 β 羟基戊酸酯 )共聚物 (简称PHBV)等温结晶行为的影响 .结果表明 ,Avrami方程指数n、成核机理、晶体生长方式基本上不受成核剂的影响 .少量的成核剂可使结晶成核自由能降低 ,结晶速率加大 ,其中氮化硼的效果最为显著
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| 关 键 词： | (β羟基丁酸酯与β羟基戊酸酯)共聚物 成核剂 等温结晶动力学 |
EFFECT OF NUCLEATING AGENT ON THE ISOTHERMAL CRYSTALLIZATION KINETICS OF PHBV |
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| Abstract: | The crystallization behavior of PHBV, poly( β hydroxybutyrate\| co\|β \|hydrxyvalerate), with nucleating agents under isothermal conditions was investigated. A differential scanning calorimeter was used to monitor the crystallization process from the melt. During isothermal crystallization, the dependence of relative degree of crystallinity on time was described by the Avrami equation. It has been shown that the addition of BN and Talc causes a considerable increase in the overall crystallization rate of PHBV but does not influence the Avrami exponent n, mechanism of nucleation and spherulite growth mode of PHBV. A little of nucleating agent will increase the crystallization rate and decrease the fold surface free energy σ e, remarkably. The effect of BN is more significant than that of Talc. |
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| Keywords: | PHBV Nucleating agent Isothermal crystallization |
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