Promoting dispersion of graphene nanoplatelets in polyethylene and chlorinated polyethylene by Friedel-Crafts reaction
作者：Guo ZH, Ran SY, Fang ZP*
关键字：Polymer-matrix composites; Interface; Transmission electron microscopy; Friedel-Crafts reaction
论文来源：期刊
具体来源：Compos. Sci. Technol., 2013.9, 86: 157-163
发表时间：2013年
Graphene nanoplatelets (GNPs) are the stacks of multi-layered graphene sheets which can be incorporated with different polymers in order to gain outstanding performance in mechanical, thermal, electrical, optical and barrier properties. However, the strong van der Waals interactions between graphene sheets make GNPs tend to agglomerate in polymer matrix, resulting in the concentration of stresses. In this paper, GNPs were compounded with high density polyethylene (HDPE) and chlorinated polyethylene (CPE) in the presence of a Lewis acid catalyst (AlCl3). The macrocarbocations in polymer chains, initiated by Friedel-Crafts reaction, formed strong interaction with delocalized conjugated ? electrons of graphene sheets, which benefited to unfolding the aggregations of GNPs and improving its dispersion in the composites.