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学科主题: 高分子化学
题名: The Crystallization and Morphology of Biodegradable Poly(butylene succinate-co-terephthalate) Copolyesters with High Content of BT Units
其他题名: 生物降解性聚丁二酸丁二醇共聚对苯二甲酸酯的结晶与形貌
作者: Li FX(李发学) ; Luo SL(罗胜利) ; Ma C(马驰) ; Yu JY(俞建勇) ; Cao AM(曹阿民)
通讯作者: 李发学
刊名: J. Appl. Polym. Sci.
发表日期: 2010
卷: 118, 期:2, 页:623-630
收录类别: SCI
部门归属: 东华大学; 中国科学院上海有机化学研究所
英文摘要: Isothermal crystallization and morphology of biodegradable PBST copolyesters with high content of BT units were investigated. The crystallization kinetic analysis showed that the Avrami exponent n ranged from 3.2 to 4.9, indicating a three-dimensional growth initiated by homogeneous nucleation mechanism at low crystallization temperature and heterogeneous nucleation mechanism at high temperature. After isothermal crystallization, multiple melting peaks were observed during DSC heating, and were explained by the melting and recrystallization model. The equilibrium melting temperatures of the PBST copolyesters were determined by Hoffman Weeks and Gibbs Thomson methods, respectively. Two methods, however, gave different values for each sample. The origin of the complexity and its influences on the equilibrium melting temperature of the copolyesters were analyzed. According to WAXD measurement, the copolyesters were identified to have the same crystal structure as that of PBT, suggesting that only the BT units were crystallized in the system whereas the BS units were in the amorphous state. POM micrographs showed that the crystals of the copolyesters were composed of little spherulites, beneficial to forming flexible fibers. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 118: 623-630, 2010
语种: 英语
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WOS记录号: WOS:000280748400001
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内容类型: 期刊论文
URI标识: http://ir.sioc.ac.cn/handle/331003/22950
Appears in Collections:高分子材料研究室_期刊论文

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Recommended Citation:
Li FX,Luo SL,Ma C,et al. The Crystallization and Morphology of Biodegradable Poly(butylene succinate-co-terephthalate) Copolyesters with High Content of BT Units[J]. J. Appl. Polym. Sci.,2010,118(2):623-630.
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