| 热喷涂LDPE/n-SiO2复合涂层非等温结晶动力学 |
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| 引用本文： | 李亚东,朱忠诚,张晓静,何领好,张忠厚. 热喷涂LDPE/n-SiO2复合涂层非等温结晶动力学[J]. 化工学报, 2011, 62(3): 710-715 |
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| 作者姓名： | 李亚东 朱忠诚 张晓静 何领好 张忠厚 |
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| 作者单位： | 郑州轻工业学院，河南省表界面科学重点实验室 |
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| 基金项目： | 河南省基础与前沿技术研究计划项目 |
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| 摘 要： | 采用火焰喷涂法制备了低密度聚乙烯（LDPE）涂层和LDPE/纳米二氧化硅（n-SiO2）复合涂层。利用差示扫描量热法（DSC）对涂层的非等温结晶行为进行研究，并用Jeziorny法和Mo法进行处理。结果表明，Jeziorny法和Mo法处理涂层的非等温结晶过程比较合理；Jeziorny法得到的结晶速率常数和Avrami指数均随冷却速率的增加而增加，且n-SiO2的加入使复合涂层的结晶速率常数和Avrami指数略有升高、半结晶时间降低，结晶速率增大，表明n-SiO2关 键 词： | 热喷涂 低密度聚乙烯 纳米氧化硅 非等温结晶动力学 复合涂层 |
Non-isothermal crystallization kinetics of thermally sprayed low-density polyethylene/nano-SiO2 composite coating |
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| LI Yadong,ZHU Zhongcheng,ZHANG Xiaojing,HE Linghao,ZHANG Zhonghou. Non-isothermal crystallization kinetics of thermally sprayed low-density polyethylene/nano-SiO2 composite coating[J]. Journal of Chemical Industry and Engineering(China), 2011, 62(3): 710-715 |
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| Authors: | LI Yadong ZHU Zhongcheng ZHANG Xiaojing HE Linghao ZHANG Zhonghou |
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| Abstract: | The non-isothermal crystallization behavior of pure low-density polyethylene（LDPE） coating and LDPE/n-SiO2 composite coating prepared by flame spraying was investigated by differential scanning calorimetry (DSC)at various cooling rates.The Avrami analysis modified by Jeziorny and Mo models could describe the non-isothermal crystallization process of LDPE and LDPE/n-SiO2 composite coating successfully.The values of Zc and n increased with increasing cooling rate.The values of Zc and n of composite coatings containing nano-SiO2 were higher than those of pure LDPE coating.The half-time values of crystallization showed that the crystallization rate of LDPE/n-SiO2 composite coating was faster than that of pure LDPE coating at a given cooling rate.Furthermore, it was found that nano-SiO2 in LDPE coating acted as an effective nucleation agent. |
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