Investigation on the Dynamic Melt Rheological Properties of Polypropylene/Wood Flour Composites
Investigation on the Dynamic Melt Rheological Properties of Polypropylene/Wood Flour Composites
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DOI：
10.1002/pc.20573
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发表时间：
2009-04-01
影响因子：
5.2
通讯作者：
Ghasemi, I.
中科院分区：
文献类型：
--
作者：
Azizi, H.;Ghasemi, I.
采用动态模式下的小型流变仪研究了聚丙烯/木粉（WF）复合材料在恒温、宽频率范围内的流变行为。研究了WF含量、粒径和偶联剂对熔体流变性能的影响。研究了不同样品的熔体流变学数据，包括复数粘度（eta*）、储能模量（G '）、损耗模量（G“）和损耗角正切（tan δ）。结果表明，复合粘度随木材含量和偶联剂的增加而增加。偶联剂的增容作用使材料的储能模量和损耗模量均有所提高，但储能模量的变化幅度较大。随着木材含量的增加，储能模量增加。随着木材粒径的增大，复合粘度、储能模量和损耗模量均出现最小值。Tan δ随木材含量的增加而减小。Cole-Cole图表明，松弛过程随着WF、偶联剂的添加以及木材目数的不同而变化。Han图揭示了在恒定温度下流变性质与组成的敏感性。Polym. COMPOS.，30：429-435，2009. (C)2008年塑料工程师学会
The rheological behavior of polypropylene/wood flour (WF) composite was investigated at constant temperature over a wide range of frequencies using a mechanical compact rheometer operated in the dynamic mode. The effect of WF content, particle size, and coupling agent on melt rheological properties were investigated. The melt rheological data in terms of complex viscosity (eta*), storage modulus (G'), loss modulus (G ''), and loss tangent (tan delta) were studied and compared for different samples. It was found that complex viscosity increases with increasing wood content and coupling agent. Compatibilization using coupling agent increased both storage modulus and loss modulus, but the variation of storage modulus is more. By increasing wood content storage modulus increases. Complex viscosity, storage modulus, and loss modulus showed a minimum value by increasing of wood particle size. Tan delta decreases with increasing of wood content. Cole-Cole plot indicated that relaxation process changes with addition WF, coupling agent, and using different mesh size of wood. The Han plots revealed the sensitivity of rheological properties with composition at constant temperature. POLYM. COMPOS., 30:429-435, 2009. (C) 2008 Society of Plastics Engineers