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首页> 外文期刊>Journal of Applied Polymer Science >Isothermal crystallization kinetics of poly(butylene terephthalate-co- sebacate) copolymer
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Isothermal crystallization kinetics of poly(butylene terephthalate-co- sebacate) copolymer

机译：聚对苯二甲酸丁二酯-癸二酸酯共聚物的等温结晶动力学

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摘要

Poly(butylene terephalate) (PBT) and poly(butylene terephthalate-co- sebacate) (PBTS) copolymers containing 5 mol % and 10 mol % sebacate components (Mn = 12,700-14,600) were synthesized by polycondensation. The isothermal crystallization kinetics and melting behaviors after isothermal crystallization of the polymers were investigated by differential scanning calorimetry (DSC). The equilibrium melting temperatures of the polymers were determined by Hoffman-Weeks equation. Analysis of the crystallization kinetic data using the Avrami equation showed that the introduction of sebacate enhanced the crystallization of PBT in PBTS. And the Avrami exponent n varies in the range of 2.16-3.68, indicating that the isothermal crystallization follows two- and three-dimensional growth mechanism. The isothermal crystallization activation energies of the polymers were also calculated by the Arrhenius equation.
机译：通过缩聚合成包含5mol％和10mol％癸二酸酯组分（Mn ＝ 12,700-14,600）的聚对苯二甲酸丁二酯（PBT）和聚对苯二甲酸丁二酯-癸二酸酯（PBTS）共聚物。通过差示扫描量热法（DSC）研究了聚合物等温结晶后的等温结晶动力学和熔融行为。聚合物的平衡熔融温度通过Hoffman-Weeks方程确定。使用Avrami方程分析结晶动力学数据表明，癸二酸酯的引入增强了PBTS中PBT的结晶。 Avrami指数n在2.16-3.68范围内变化，表明等温结晶遵循二维和三维生长机理。聚合物的等温结晶活化能也通过Arrhenius方程计算。

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