首页|Effects of Molecular Weight and Annealing on Electrical Conductivity of Multi-walled Carbon Nanotube/Polypropylene Composites

Effects of Molecular Weight and Annealing on Electrical Conductivity of Multi-walled Carbon Nanotube/Polypropylene Composites

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  • NETL
  • NSTL
  • Trans Tech Publications Ltd
Composites of polypropylene (PP) and multi-walled carbon nanotubes (MWCNTs) were prepared by a micro melt mixing process. The molecular weight of PP was varied from 190,000 to 340,000 to examine its effects on the electrical conductivity. It has been discovered that a significant enhancement of electrical conductivity could be achieved by a thermal post annealing process above the melting temperature of PP. Factors such as annealing time, temperature, viscosity of PP, and content of MWCNTs all affected the enhancement of electrical conductivity. Re-aggregation of MWCNTs and the subsequent formation of MWCNT networks during annealing are considered to be the main reasons for the quick enhancement of electrical conductivity. The observed effect of molecular weight of PP on the enhancement of electrical conductivity suggested that the enhancement process could be controlled by diffusion of MWCNTs.

carbon nanotubespolypropylenecompositeselectrical conductivity

Yongzheng Pan、Lin Li、Siew Hwa Chan、Jianhong Zhao

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School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798 Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, Singapore 638075

School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798

Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, Singapore 638075

2010

10.4028/www.scientific.net/KEM.447-448.619

Key engineering materials

Key engineering materials

ISSN：1013-9826
年,卷(期)：2010.447/448
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