Joule heat dependence of dynamic tensile modulus of polyimide-vapor grown carbon fiber nanocomposites under applied electric field evaluated in terms of thermal fluctuation-induced tunneling effect

摘要: Abstract To study mechanical and structural stabilities of polyimide (PI) carbon filler composites by Joule heat, PI-vapor grown fiber (VGCF) were fabricated in situ polymerization to realize excellent dispersion VGCFs PI matrix. Adoption similar rigid fibers is the strategy investigate conductive mechanism theoretically terms thermal fluctuation-induced tunneling conduction. Dynamic tensile modulus X-ray intensity under applied electric field measured frequency-temperature dependence heat relation electron transfer mechanisms. Such simultaneous measurements for properties provided important information about characteristic polymer-filler composites. As results, good resistance PI-VGCF was clarified be attributed very few fluctuation chain arrangement spite collision between electrons flowed out from VGCF gaps atoms chains.