Nonisothermal Crystallization Kinetics of Poly(butylene adipate-co-terephthalate) Copolyester
Nonisothermal Crystallization Kinetics of Poly(butylene adipate-co-terephthalate) Copolyester
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发表时间：
2012
影响因子：
0.9
通讯作者：
Wang;Xiaohui;Shi;Jun;Chen;Ying;Fu;Zhi-feng;Yan
中科院分区：
文献类型：
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作者：
Wang;Xiaohui;Shi;Jun;Chen;Ying;Fu;Zhi-feng;Yan
用差示扫描量热法(DSC)研究了直接酯化和缩聚反应合成的聚己二酸丁二醇酯-对苯二甲酸丁二醇酯(PBAT)的非等温结晶行为。用Jeziorny修正的Avrami方程和Z.S.Mo方程描述了共聚酯样品的非等温结晶动力学。实验结果表明，Avrami方程能较好地描述PBAT共聚酯的非等温结晶过程。PBAT共聚酯可产生二次结晶。结晶参数(Zc)随冷却速度的增加而增大，Avrami指数(N)约为2.3。在给定的降温速率下，Zc值随己二酸(AA)含量的增加而呈下降趋势。Z.S.Mo提出的方程较好地描述了PBAT共聚酯的非等温结晶动力学。关键词：非等温结晶动力学；共聚酯；聚(己二酸丁二醇酯-对苯二甲酸丁二醇酯)；DSC
Nonisothermal crystallization behavior of poly(butylene adipate-co-terephthalate) (PBAT) synthesized via direct esterification and polycondensation reactions was investigated by the differential scanning calorimetry (DSC). The Avrami equation modified by Jeziorny and the Z. S. Mo equation were employed to describe the non-isothermal crystallization ki - netics of copolyester samples. The test results showed that the Avrami equation was successful in describing nonisothermal crystallization process of PBAT copolyesters. PBAT copolyester could give birth to secondary crystallization. The crystal- lization parameter (Zc) increased with an increasing cooling rate and the Avrami exponent (n) was around 2.3. For a given cooling rate, the value of Zc demonstrated a sagging trend with an increase in adipic acid (AA) content . The equation pro- posed by Z. S. Mo was successful in describing the nonisothermal crystallization kinetics of PBAT copolyesters. Keyword: nonisothermal crystallization kinetics; copolyester; poly(butylene-adipate-co-terephthalate); DSC