中国塑料 ›› 2008, Vol. 22 ›› Issue (09): 43-48.DOI: 10.19491/j.issn.1001-9278.2008.09.009

• 材料与性能 • 上一篇    下一篇

PBT /纳米SiO2非等温结晶动力学研究

张天水; 牛建华;张 玲;洪月蓉;李春忠   

  1. 华东理工大学材料科学与工程学院超细材料制备与应用教育部重点实验室;浙江华之杰塑料建材有限公司
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2008-09-26 发布日期:2008-09-26

Study of the Nonisothermal Crystallization Kinetics of PBT / Nano-SiO2 Composites

ZHANG Tian-shui;NIU Jian-hua;ZHANG Ling;HONG Yue-rong;LI Chun-zhong   

  1. School of Materials Science and Engineering,Key Laboratory for Ultrafine Materials of Ministry of Education,East China University of Science and Technology;Zhejiang Huazhijie Plastic Building Material Co., Ltd.
  • Received:1900-01-01 Revised:1900-01-01 Online:2008-09-26 Published:2008-09-26
  • Contact: ZHANG Tian-shui

摘要: 熔融制备了PBT/纳米SiO2复合材料,用DSC分别研究了SiO2在低含量(0.3%质量分数)和高含量(3%)时的非等温结晶行为;并分析了PBT/纳米SiO2复合材料的结晶动力学。结果表明,纳米SiO2对PBT有异相成核作用,加入纳米SiO2后,显著提高了PBT结晶温度,加快了其结晶速率。结晶动力学表明,莫志深法很好的吻合了PBT/纳米SiO2复合材料体系,而Ozawa方法并不太适合。通过结晶活化能的计算,表明在低含量(0.3%)时有更好的结晶能力。

关键词: 聚对苯二甲酸丁二醇酯, 纳米二氧化硅, 非等温结晶, 动力学, 纳米复合材料

Abstract: Poly(butylenes terephthalate)/Nano-SiO2 nanocomposites were prepared by melt blending using a twin screw extruder. The nonisothermal crystallization kinetics of the nanocomposites was studied with differential scanning calorimetry (DSC) and the effect of SiO2 was explored. It showed that crystallization peak temperature for the nanocomposites was much higher than that of neat PBT. Nano-SiO2 accelerated the crystallization rate, indicating an obvious heterogeneous nucleation. Crystallization kinetics data was analyzed by Ozawa, Mo, and Kissinger methods. The results confirmed the applicability of Mo, and Kissinger models, and the inadequacy of the Ozawa approach. In addition, a lower activation energy was observed at a low content of nano-SiO2 (0.3wt%) than that at a high content (3.0wt%).

Key words: poly(butylene terephthalate), nanosilica, nonisothermal crystallization, kinetics, nanocomposites