Synergistic Effect of P[MPEGMA-IL] Modified Graphene on Morphology and Dielectric Properties of PLA/PCL Blends

Yiyang Zhou,1

Ping Wang,2

Gang Ruan,1

Pei Xu,1*Email

Yunsheng Ding1*Email

 

 

 

1Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Functional Materials and Devices, Hefei University of Technology, Hefei 230009, China

2School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei 230601, China

Abstract

To  investigate the combined effect of graphene (Gra) and poly(methoxy poly(ethylene glycol) monomethacrylate-co-1-vinyl-3-ethylimidazolium bromide) (P[MPEGMA-IL]) on morphology, crystallization behavior and dielectric properties for polylactide (PLA)/poly(e-caprolactone) (PCL) blends, a series of PLA/PCL blend based composites have been prepared using solution-cast method. P[MPEGMA-IL] modified Gra could mainly localize in PCL domains, and improved the dispersibility of PCL phase in the composites. Due to the heterogeneous nucleation of Gra and ion cluster of P[MPEGMA-IL], the crystallinity of PLA and PCL were improved simultaneously with the increase of modified Gra content. The good conductivity of Gra and the better dispersion of PCL made the PLA/PCL blends higher dielectric permittivity owing to the increase of the mobile charge carriers at the interfaces.

Synergistic Effect of P[MPEGMA-IL] Modified Graphene on Morphology and Dielectric Properties of PLA/PCL Blends