Linear viscoelastic properties and crystallization behavior of multi-walled carbon nanotube/polypropylene composites
作者：Wu, Defeng，Sun, Yurong，Wu, Liang，Zhang, Ming
關鍵字：polypropylene; multi-walled carbon nanotube;
論文來源：期刊
具體來源：Journal of Applied Polymer Science
發表時間：2008年
Multi-walled carbon nanotube/polypropylene composites (PPCNs) were prepared by melt compounding. The linear viscoelastic properties, nonisothermal crystallization behavior, and kinetics of PPCNs were, respectively, investigated by the parallel plate rheometer, differential scanning calorimeter (DSC), X-ray diffractometer (XRD), and polarized optical microscope (POM). PPCNs show the typical nonterminal viscoelastic response because of the percolation of nanotubes. The rheological percolation threshold of about 2 wt % is determined using Cole-Cole method. Small addition of nanotube can highly promote crystallization of PP matrix because of the heterogeneous nucleating effect. With increasing nanotube loadings, however, the crystallization rate decreases gradually because the mobility of PP chain is restrained by the presence of nanotube, especially at high loading levels.