| Isothermal Crystallization Behavior of Biodegradable Poly （butylene succinate-co-terephthalate） （PBST） Copolyesters at High Undercoolings |
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| 引用本文： | 许新建,李发学,罗胜利,俞建勇.Isothermal Crystallization Behavior of Biodegradable Poly （butylene succinate-co-terephthalate） （PBST） Copolyesters at High Undercoolings[J].东华大学学报(英文版),2008,25(4):405-407. |
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| 作者姓名： | 许新建 李发学 罗胜利 俞建勇 |
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| 作者单位： | College of Textiles，Donghua University |
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| 摘 要： | Poly （butylene succinatc-co-terephthalate） （PBST） copolycsters were prepared by polycondensation. The 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 mucleation and a 3-dimensional spherulitic growth. The maximum crystallization rate, very useful to polymer processing, was found at about 90℃ based on the half-crystallization time t1/2 analysis.
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| 关 键 词： | PBST DLI 等温跳进 结晶作用 冷却过程 |
Isothermal Crystallization Behavior of Biodegradable Poly (butylene succinate-co-terephthalate)(PBST) Copolyesters at High Undercoolings |
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| XU Xin-jian,LI Fa-xue,LUO Sheng-li,YU Jian-yong.Isothermal Crystallization Behavior of Biodegradable Poly (butylene succinate-co-terephthalate)(PBST) Copolyesters at High Undercoolings[J].Journal of Donghua University,2008,25(4):405-407. |
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| Authors: | XU Xin-jian LI Fa-xue LUO Sheng-li YU Jian-yong |
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| Institution: | College of Textiles,Donghua University,Shanghai 201620,China |
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| Abstract: | Poly(butylene succinate-co-terephthalate)(PBST)copolyesters were prepared by polycondensation.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-dimensional spherulitic growth.The maximum crystallization rate,very useful to polymer processing,was foundat about 90℃ based on the half-crystallization time t1/2 analysis. |
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| Keywords: | PBST copolyesters DLI isothermal crystallization high undercoolings |
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