Physical properties of thin PVDF/MWNT (multi-walled carbon nanotube) composite films by melt blending.
Poly(vinylidene fluoride)(PVDF)/Multi-walled carbon nanotube (MWNT) composites were melt blended using internal mixer. The relationships between structures and physical properties of thin PVDF/MWNT composite films were studied. With increasing the content of MWNT, the size of spherulites in PVDF decreased. MWNT was used as a nucleating agent. The incorporation of MWNT produced a polar beta-form crystal structure of PVDF. The permittivities of thin PVDF/MWNT composite films were increased with increasing the MWNT content. The percolation level in electrical conductivity occurred between 2 and 2.5 wt%. The critical conductivity saturation point for the electrical conductivity in PVDF was confirmed. Similar tendency was also observed in thermal conductivity.
Hong
Soon Man
SM
Polymer Hybrids Research Center, Korea Institute of Science and Technology, P.O. Box 131, Cheongryang, Seoul, Korea.
Hwang
Seung Sang
SS