| 聚丙烯/纳米CaCO3复合材料的结晶行为研究 |
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| 引用本文： | 包崇龙,朱耕宇,陈雪萍,浦群,叶继华. 聚丙烯/纳米CaCO3复合材料的结晶行为研究[J]. 中国塑料, 2008, 22(11): 38-42. DOI: 10.19491/j.issn.1001-9278.2008.11.008 |
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| 作者姓名： | 包崇龙 朱耕宇 陈雪萍 浦群 叶继华 |
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| 作者单位： | 浙江大学化学工程国家重点实验室，浙江大学化学工程与生物工程学系，浙江 杭州310027 |
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| 摘 要： | 用超重力法制备的纳米CaCO3和PP熔融共混制备了PP/CaCO3复合材料，并对PP/CaCO3复合材料的结晶行为进行了详细研究。差示扫描量热分析表明，纳米CaCO3粒子的加入加快了PP的结晶速率，缩短了半结晶时间，130℃时含15份纳米CaCO3的PP/CaCO3复合材料的半结晶时间比纯PP的减少了8.92 min；结晶度有轻微下降，结晶温度为126.5 ℃时纯PP的结晶度为44.33 %，含15份纳米CaCO3的PP/CaCO3复合材料的结晶度为35.9 %。动力学研究数据表明，等温结晶过程符合Avrami方程，PP/CaCO3的n和k值都大于纯PP的；利用偏光显微镜观察了PP/CaCO3复合材料的结晶形貌及结晶生长过程，纳米CaCO3粒子的加入使球晶数量明显增多，意味着CaCO3起到了结晶成核剂的作用。
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| 关 键 词： | 聚丙烯 纳米碳酸钙 结晶行为 |
| 收稿时间： | 2008-01-01 |
Crystallization Behavior of PP and PP/Nano-CaCO_3 Composites |
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| BAO Chong-long ZHU Geng-yu CHEN Xue-ping PU Qun YE Ji-hua. Crystallization Behavior of PP and PP/Nano-CaCO_3 Composites[J]. China Plastics, 2008, 22(11): 38-42. DOI: 10.19491/j.issn.1001-9278.2008.11.008 |
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| Authors: | BAO Chong-long ZHU Geng-yu CHEN Xue-ping PU Qun YE Ji-hua |
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| Affiliation: | State Key Laboratory of Chemical Engineering of Zhejiang University，Department of Chemical and Biochemical Engineering of Zhejiang University, Hangzhou 310027,China |
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| Abstract: | The crystallization behavior of PP/CaCC)3 composites was investigated by means of differential scanning calorimeter (DSC) and polarized light microscope (PLM).DSC data showed that CaCC_3 could serve as a nucleating agent,resulting in an enhancement of the overall crystallization rate.The crystal morphology of PP/CaCC_3 composite was observed by polarized light microscope (PLM).A constant spherulite growth rate was observed at given isothermal crystallization temperature. |
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| Keywords: | polypropylene nano-calcium carbonate crystallization behavior |
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