Isothermal crystallization behavior of biodegradable poly (butylene succinate-co-terephthalate) (PBST) copolyesters at high undercoolings

被引:0
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作者
Xu, Xin-Jian [1 ]
Li, Fa-Xue [1 ]
Luo, Sheng-Li [1 ]
Yu, Jian-Yong [1 ]
机构
[1] College of Textiles, Donghua University, Shanghai 201620, China
关键词
Undercooling - Nucleation - Butenes - Crystallization kinetics;
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摘要
Poly ( butylene succinate-co-terephthalate) (PBST) copolyesters were prepared by polycondensatioa The isothermal crystallization behavior of the as-prepared copolyesters was investigated by depolarized light intensity ( DLI ) at high undercoolings. According to Avrami equation, the exponent n, independent of the crystallization temperature, is at a range of 2.5 to 3. 4, which probably corresponds to the heterogeneous nucleation and a 3-dirnensional spherulitic growth. The maximum crystallization rate, very useful to polymer processing, was found at about 90°C based on the half-crystallization time t1/2analysis.
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页码:405 / 407
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