Conductive and viscoelastic behaviors of carbon black filled polystyrene during annealing

✍ Scribed by Qing Cao; Yihu Song; Yeqiang Tan; Qiang Zheng

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 785 KB
• Volume: 48
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/j.carbon.2010.07.036

✦ Synopsis

Aggregation of carbon black (CB) aggregates in polystyrene melt was traced by simultaneous measurement of resistance (R) and dynamic storage modulus (G 0 ) as a function of annealing time. There existed a dynamic resistance percolation in the time evolution of R while G 0 increased gradually during the whole experimental time scale. Dynamic resistance and modulus percolation models were used to model the time-dependent R and G 0 , respectively. Furthermore, the time evolution of G 0 was explained with a combination of the kinetic cluster-cluster aggregation model and the first order kinetics aggregation model. It was found that the aggregation of CB aggregates in the molten polystyrene has a close relation with the terminal relaxation of polystyrene molecules. The results indicated that the interfacial tension between polystyrene molecules and CB plays a crucial role in driving CB to aggregate.