Nonisothermal crystallization behavior of melt‐intercalated polyethylene‐clay nanocomposites
Nonisothermal crystallization behavior of melt‐intercalated polyethylene‐clay nanocomposites
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DOI：
10.1002/app.24852
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发表时间：
2006-11
影响因子：
3
通讯作者：
Q. Yuan;S. Awate;R. Misra
中科院分区：
文献类型：
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作者：
Q. Yuan;S. Awate;R. Misra
研究了纳米粘土对熔融复合法制备的插层聚乙烯（PE）非等温结晶行为的影响。在不同的冷却速率下，聚乙烯/粘土纳米复合材料的结晶峰温度（Tp）均略高于纯聚乙烯。随着粘土含量的增加，晶化的半衰期（t0.5）减小，表明纳米粘土颗粒具有成核作用。采用Avrami （Polymer 1971, 12, 150）、Ozawa （Polym Eng Sci 1997, 37, 443）和Mo等（J Res Natl Bur Stand 1956, 57, 217）的方法对非等温结晶数据进行了分析，并讨论了不同动力学模型对PE/粘土纳米复合材料非等温结晶过程的有效性。Mo和同事开发的方法成功地解释了PE和PE/粘土纳米复合材料的非等温结晶行为。采用Kissinger （J Res Natl Bur Stand 1956, 57, 217）方法测定了纯PE和PE/粘土纳米复合材料非等温结晶的活化能。©2006 Wiley期刊公司应用化学学报，2006,31 (2):389 - 398
The influence of nanoclay particles on the nonisothermal crystallization behavior of intercalated polyethylene (PE) prepared by melt-compounding was investigated. It is observed that the crystallization peak temperature (Tp) of PE/clay nanocomposites is slightly but consistently higher than the neat PE at various cooling rates. The half-time (t0.5) for crystallization decreased with increase in clay content, implying the nucleating role of nanoclay particles. The nonisothermal crystallization data are analyzed using the approach of Avrami (Polymer 1971, 12, 150), Ozawa (Polym Eng Sci 1997, 37, 443), and Mo and coworkers (J Res Natl Bur Stand 1956, 57, 217), and the validity of the different kinetic models to the nonisothermal crystallization process of PE/clay nanocomposites is discussed. The approach developed by Mo and coworkers successfully explains the nonisothermal crystallization behavior of PE and PE/clay nanocomposites. The activation energy for nonisothermal crystallization of neat PE and PE/clay nanocomposites is determined using the Kissinger (J Res Natl Bur Stand 1956, 57, 217) method. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 3809–3818, 2006