화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.28, No.12, 1166-1173, November, 2020
DOI10.1007/s13233-020-8144-7  Export Citation
Improving Dispersion and Mechanical Properties of Polypropylene/Graphene Nanoplatelet Composites by Mixed Solvent-Assisted Melt Blending
Min Gyu Lee, Sangwoon Lee, Jaehyun Cho1, and Jae Young Jho†
  • School of Chemical and Biological Engineering, Seoul National University, Seoul 08826, Korea
  • 1Institute of Advanced Composite Materials, Korea Institute of Science and Technology, Jeonbuk 54896, Korea
E-mail:
To improve the dispersion of graphene nanoplatelet (GNP) in polypropylene (PP), GNP was exfoliated in a mixed solvent of p-xylene and N,N-dimethylform-amide (DMF) and the exfoliation of GNP was maintained by the addition of a compatibilizer before the melt blending. The concentration of the dispersed GNP in various ratios of the mixed solvents was measured in order to confirm the effect of the mixed solvent on the pre-treatment process. As a compatibilizer for the composite, pyrene-functionalized maleic anhydride-grafted polypropylene (Py-PP) was synthesized. The dispersion state of the composites was analyzed by the three dimensional non-destructive X-ray micro-computed tomography (3D micro-CT). The improved dispersion of GNP resulted in a significant enhancement in the mechanical properties. Young’s modulus of PP composites with 2 wt% GNP has increased by 43% compared with that of PP. These results are attributed not only to the improved interfacial interaction between PP and GNP, but also to the homogeneous dispersion state of the GNP in the matrix.
Keywords:polypropylene;graphene nanoplatelet;compatibilizer;dispersion;mechanical property
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