Torque Viscometry of Molten Polymers and Composites
Torque Viscometry of Molten Polymers and Composites
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熔融聚合物和复合材料的扭矩粘度测定
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
J. Vlachopoulos
中科院分区：
文献类型：
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作者：
C. R. Santi;E. Hage;C. Correa;J. Vlachopoulos
第19卷·第1期摘要：描述了一种从转矩流变仪收集数据的系统方法，并对Bousmina等人的模型进行了评价，用于HDPE，LDPE，LLDPE和HDPE/填料复合材料。扭矩流变仪的结果是在良好的协议，毛细管和平行板粘度计测量纯聚合物，当测量的扭矩值进行校正的温度上升，由于粘性耗散。对于复合材料，扭矩和毛细管的结果几乎一致，但粘度低于那些用平行板仪器测量，在振荡模式下，因为Cox-Merz规则是无效的。虽然有一些限制，在高剪切速率，由于粘性耗散，目前的工作提供了一个证明和方法的实际效用的扭矩流变仪的粘度测量在高粘度系统。
Volume 19 · Issue 1 Abstract: A systematic approach for collecting data from a torque rheometer is described, and the Bousmina et al. model is evaluated for HDPE, LDPE, LLDPE and HDPE/filler composites. The torque rheometer results are in good agreement to capillary and parallel plate viscometer measurements for neat polymers, when the torque values measured are corrected for the temperature rise due to viscous dissipation. For the composites, the torque and capillary results virtually coincide, but the viscosities are lower than those measured with the parallel plate instrument, in oscillatory mode, because the Cox-Merz rule is not valid. Although there are some limitations at high shear rates, due to viscous dissipation, the present work provides a proof and a methodology for the practical utility of torque rheometers for viscosity measurement in highly viscous systems.