| 一种新型成核剂对聚乳酸等温结晶行为的影响(英文) |
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| 引用本文： | 温亮,辛忠. 一种新型成核剂对聚乳酸等温结晶行为的影响(英文)[J]. 中国化学工程学报, 2010, 18(6): 899-904. DOI: 10.1016/S1004-9541(09)60145-2 |
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| 作者姓名： | 温亮 辛忠 |
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| 作者单位： | State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China |
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| 基金项目： | Supported by the National Natural Science Foundation of China (20876042);Program of Shanghai Subject Chief Scientist (10XD1401500);Research Fund for the Doctoral Program of Higher Education of China |
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| 摘 要： | The effect of a novel active nucleating agent(TBC8-eb) on the isothermal crystallization of poly(L-lactic acid) (PLLA) was studied by differential scanning calorimetry(DSC) and Fourier transform infrared spectroscopy(FTIR) . The analysis on kinetics demonstrates that TBC8-eb can not only accelerate the crystallization rate but also transform most of the original spherulite crystals of PLLA into sheaf-like crystals. Furthermore,the free energy of folding(σe) of PLLA and PLLA with TBC8-eb is 0.15 and 0.06 J·m-2,respectively,which suggests that the addition of TBC8-eb favors the regular folding of molecule chains in the crystallization of PLLA,improv-ing its crystallization rate. The FTIR results show that TBC8-eb can accelerate the conformational ordering of PLLA in the isothermal crystallization. The conformational ordering of PLLA nucleated with TBC8-eb begins with the interchain interaction of CH3,and then a short helix emerges where a couple of CH3 groups interact.
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| 关 键 词： | crystallization poly(L-lactic acid) nucleating agent |
| 收稿时间： | 2010-06-13 |
| 修稿时间： | 2010-6-13 |
Effect of a Novel Nucleating Agent on Isothermal Crystallization of Poly(L-lactic acid) |
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| Liang WEN,Zhong XIN,. Effect of a Novel Nucleating Agent on Isothermal Crystallization of Poly(L-lactic acid)[J]. Chinese Journal of Chemical Engineering, 2010, 18(6): 899-904. DOI: 10.1016/S1004-9541(09)60145-2 |
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| Authors: | Liang WEN Zhong XIN |
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| Affiliation: | State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China;State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China |
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| Abstract: | The effect of a novel active nucleating agent(TBC8-eb) on the isothermal crystallization of poly(L-lactic acid) (PLLA) was studied by differential scanning calorimetry(DSC) and Fourier transform infrared spectroscopy(FTIR). The analysis on kinetics demonstrates that TBC8-eb can not only accelerate the crystallization rate but also transform most of the original spherulite crystals of PLLA into sheaf-like crystals. Furthermore,the free energy of folding(σe) of PLLA and PLLA with TBC8-eb is 0.15 and 0.06 J·m-2,respectively,which suggests that the addition of TBC8-eb favors the regular folding of molecule chains in the crystallization of PLLA,improv-ing its crystallization rate. The FTIR results show that TBC8-eb can accelerate the conformational ordering of PLLA in the isothermal crystallization. The conformational ordering of PLLA nucleated with TBC8-eb begins with the interchain interaction of —CH3,and then a short helix emerges where a couple of —CH3 groups interact. |
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| Keywords: | crystallization poly(L-lactic acid) nucleating agent |
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