The interaction between PTFE and porous metals and metal blacks — rheological characterization and thermal degradation of the polymer

Autor:	Klinedinst, K. A., Vogel, W. M., Stonehart, P.
Zdroj:	Journal of Materials Science; February 1976, Vol. 11 Issue: 2 p209-214, 6p
Abstrakt:	High molecular weight PTFE (¯Mn=104 to 106) normally exhibits high thermal stability and melt viscosity. When contacted by high surface area metal blacks (Au or Pt) or porous sintered metals (Au or Ni) and heated near the melting temperature, the effective viscosities and thermal stabilities of the PTFE are orders of magnitude lower than those normally exhibited by the polymer. These results are discussed in terms of capillary flow, heterogeneous catalytic degradation, and the diffusion controlled evolution of volatile decomposition products.
Databáze:	Supplemental Index
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