Relationship between Dispersion and Conductivity of Polymer Nanocomposites: A Molecular Dynamics Study

详细信息    查看全文

• 作者：Yancong Feng ; Hua Zou ; Ming Tian ; Liqun Zhang ; Jianguo Mi
• 刊名：The Journal of Physical Chemistry B
• 出版年：2012
• 出版时间：November 1, 2012
• 年：2012
• 卷：116
• 期：43
• 页码：13081-13088
• 全文大小：470K
• 年卷期：v.116,no.43(November 1, 2012)
• ISSN：1520-5207

文摘

The dispersive and conductive properties of polymer nanocomposites are investigated simultaneously using the molecular dynamics simulation method. Four factors influencing the dispersion and conductivity are concerned, including polymer鈥搉anoparticle interaction, nanoparticles with grafted chains, cross-linking of polymer chains, and blending of polymer. It is shown that the variation of the conductive probability is not linearly related to the corresponding dispersion for all the four concerned cases. As the interaction strength increases, the dispersion of the nanoparticles appears to first increase and then drop, while the conductive probability increases monotonously. Increase of the grafting density on nanoparticles can bring about the modification of the dispersion, whereas the variation of the conductive probability is M-type. The dispersion effect increases monotonously with the increasing cross-linking density, but the corresponding conductive probability appears to first increase and then drop. The dispersive effect of nanoparticles monotonously decreases as the ratio of added incompatible polymer increases; however, the corresponding conductive probability has the maximum value.