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首页> 外文期刊>Polymer engineering and science >Isothermal Crystallization Kinetics and Melting Behaviors of Poly(butylene terephthalate) and Poly(butylene terephthalate-co-fumarate) Copolymer
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Isothermal Crystallization Kinetics and Melting Behaviors of Poly(butylene terephthalate) and Poly(butylene terephthalate-co-fumarate) Copolymer

机译：聚对苯二甲酸丁二醇酯和聚对苯二甲酸丁二醇酯-共富马酸酯共聚物的等温结晶动力学和熔融行为

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摘要

The isothermal crystallization kinetics and melting behaviors after isothermal crystallization of poly(buty-lene terephthalate) (PBT) and poly(butylene terephthalate-co-fumarate) (PBTF) containing 95/5, 90/10, and 80/20 molar ratios of terephthalic acid/fumaric acid were investigated by differential scanning calorimetry. The equilibrium melting temperatures of these polymers were estimated by Hoffman-Weeks equation. So far as the crystallization kinetics was concerned, the Avrami equation was applied and the values of the exponent n for all these polymers are in the range of 2.50-2.96, indicating that the addition of fumarate does not affect the geometric dimension of PBT crystal growth. Crystallization activation energy (ΔE) and nucleation constant (K_g) of PBTF copolymers are higher than that of PBT homopolymer, suggesting that the introduction of fumarate hinders the crystallization of PBT in PBTF.
机译：聚对苯二甲酸丁二醇酯（PBT）和摩尔比为95 / 5、90 / 10和80/20的聚对苯二甲酸丁二醇酯-共富马酸酯（PBTF）等温结晶后的等温结晶动力学和熔融行为。通过差示扫描量热法研究了对苯二甲酸/富马酸。这些聚合物的平衡熔融温度通过Hoffman-Weeks方程估算。就结晶动力学而言，应用了Avrami方程，所有这些聚合物的指数n值都在2.50-2.96的范围内，表明添加富马酸酯不会影响PBT晶体生长的几何尺寸。 PBTF共聚物的结晶活化能（ΔE）和成核常数（K_g）高于PBT均聚物，这表明富马酸酯的引入阻碍了PBTF中PBT的结晶。

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