| 纳米碳酸钙改性聚丙烯共聚物的非等温结晶动力学 |
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| 引用本文： | 张广平,朱维平,李发学,俞建勇,戴干策. 纳米碳酸钙改性聚丙烯共聚物的非等温结晶动力学[J]. 高分子材料科学与工程, 2004, 20(1): 157-160 |
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| 作者姓名： | 张广平 朱维平 李发学 俞建勇 戴干策 |
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| 作者单位： | 1. 东华大学纺织学院,上海,200051
2. 华东理工大学聚合物加工研究室,上海,200237 |
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| 摘 要： | 用DSC手段考察了反应釜内原位共聚制备的含有成核剂及纳米碳酸钙的聚丙烯(PP)共聚物的非等温结晶行为。结果表明，成核剂使PP共聚物的结晶温度升高，结晶度降低，结晶速率略有提高。而纳米碳酸钙则大幅提高了PP共聚物的结晶温度和结晶速率，结晶度也增加了约10％。并采用Ozawa法和Caze法描述了非等温结晶动力学。
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| 关 键 词： | 聚丙烯 纳米碳酸钙 原位聚合 非等温结晶动力学 成核剂 |
| 文章编号： | 1000-7555(2004)01-0157-04 |
| 修稿时间： | 2002-09-10 |
NON-ISOTHERMAL CRYSTALLIZATION KINETICS OF POLYPROPYLENE COPOLYMER MODIFIED WITH NANO-CALCIUM CARBONATE |
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| ZHANG Guang-ping,ZHU Wei-ping,LI Fa-xue,YU Jian-yong,DAI Gan-ce. NON-ISOTHERMAL CRYSTALLIZATION KINETICS OF POLYPROPYLENE COPOLYMER MODIFIED WITH NANO-CALCIUM CARBONATE[J]. Polymer Materials Science & Engineering, 2004, 20(1): 157-160 |
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| Authors: | ZHANG Guang-ping ZHU Wei-ping LI Fa-xue YU Jian-yong DAI Gan-ce |
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| Affiliation: | ZHANG Guang-ping~1,ZHU Wei-ping~2,LI Fa-xue~1,YU Jian-yong~1,DAI Gan-ce~2 |
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| Abstract: | Non-isothermal crystallization behavior of reactor-made polypropylene (PP) copolymer with or without a nucleating agent and/or nano-calcium carbonate was investigated by means of differential scanning calorimeter (DSC). The results show that PP copolymer with the nucleating agent exhibites a higher crystallization temperature, a slightly higher crystallization rate in terms of the half time and a lower degree of crystalline. But addition of nano-calcium carbonate to PP copolymer greatly increased crystallization temperature and crystallization rate, and degree of crystalline is increased by about 10%, thus being in favor of improving mechanical properties. The Ozawa theory and Caze method were employed to describe the non-isothermal crystallization kinetics. |
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| Keywords: | polypropylene copolymer in-situ polymerization nucleating agent nano-calcium carbonate non-isothermal crystallization kinetics |
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