Mechanical and dielectric properties of graphene incorporated polypropylene nanocomposites using polypropylene-graft-maleic anhydride as a compatibilizer

To achieve uniform dispersion of graphene in polypropylene, polypropylene-graft-maleic anhydride (PP-g-MA) as compatibilizer was compounded with graphene to obtain masterbatch, and then melt blended with polypropylene using a micro-compounder. Raman study showed the strong interfacial interaction be...

Full description

Saved in:
Bibliographic Details
Published in:Composites science and technology 2017-12, Vol.153, p.111-118
Main Authors: Li, Chao-Qun, Zha, Jun-Wei, Long, Hua-Qian, Wang, Si-Jiao, Zhang, Dong-Li, Dang, Zhi-Min
Format: Article
Language:English
Subjects:
Compatibility
Compatibilizer
Compatibilizers
Dielectric properties
Dispersion
Graphene
Maleic anhydride
Mechanical properties
Nanocomposites
Percolation
Polymer matrix composites
Polypropylene
Storage modulus
Tensile strength
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:To achieve uniform dispersion of graphene in polypropylene, polypropylene-graft-maleic anhydride (PP-g-MA) as compatibilizer was compounded with graphene to obtain masterbatch, and then melt blended with polypropylene using a micro-compounder. Raman study showed the strong interfacial interaction between the surface of functionalized graphene sheets (FGS) and the compatibilizer, while morphologic study indicated the homogeneous dispersion of graphene in polypropylene. Remarkable enhancements in mechanical, thermal and dielectric properties were obtained at low graphene loading. At an effective graphene content of 1.5 wt%, the tensile strength and storage modulus of polypropylene increased by 18% and 33%, respectively. The electrical percolation threshold of the nanocomposites is about 0.55 vol%, which is lower than most of previously reported polypropylene composites prepared by similar melt processing. Near the percolation threshold (0.535 vol% graphene), the dielectric permittivity increased to 15.2 and the loss tangent was kept as low as 0.20 at 103 Hz.
ISSN:0266-3538
1879-1050
DOI:10.1016/j.compscitech.2017.10.015