Rheological Investigations in Understanding Shear‐Enhanced Crystallization of Isotactic Poly(propylene)/Multi‐Walled Carbon Nanotube Composites
Rheological Investigations in Understanding Shear‐Enhanced Crystallization of Isotactic Poly(propylene)/Multi‐Walled Carbon Nanotube Composites
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DOI：
10.1002/marc.200700069
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发表时间：
2007-06
影响因子：
4.6
通讯作者：
Ke Wang;Changyu Tang;Ping Zhao;Hong Yang;Qin Zhang;R. Du;Q. Fu
中科院分区：
文献类型：
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作者：
Ke Wang;Changyu Tang;Ping Zhao;Hong Yang;Qin Zhang;R. Du;Q. Fu
描述了一种新的实验技术，用于跟踪使用动态熔体流变测定法经历稳定剪切变形的聚（丙烯）/ MWCNT 复合材料的结晶过程。确定了异相成核、温度和预剪切对结晶行为的影响。可以实现静态和预剪切条件之间结晶动力学差异的定量评估。通过将流变学与 POM 相结合，我们证明了两种不同的结晶过程分别解释了低温和高温下的剪切增强结晶。
A novel experimental technique to follow the crystallization processes of poly(propylene)/ MWCNT composites that experience a steady shear deformation using dynamic melt rheometry is described. The effects of heterogeneous nucleation, temperature, and preshear on the crystallization behaviors were determined. A quantitative evaluation of crystallization kinetics difference between quiescent and preshear conditions could be achieved. By combining rheology with POM, we demonstrate that two different crystallization processes account for the shear-enhanced crystallization at low and high temperatures, respectively.