MORPHOLOGY EVOLUTION IN PTFE AS A FUNCTION OF DEFORMATION AND MELT TIME AND TEMPERATURE: NANO-FIBRILS AND SINGLE- AND MULTI-MOLECULE FOLDED CHAIN SINGLE CRYSTALS

摘要

Evolution of the morphology of dispersed PTFE dispersion particles on glass and mica as a function of melt time and temperature indicates that individual molecules "wander" on the substrate, crystallizing (from a chain-folded "mesomorphic" state it is suggested) in single and multi-molecule chain folded single crystals when cooled. Shearing of the particles results in nano-fibril production; annealing results in shish-kebab formation through single molecule addition. Nascent dispersion particle structure will also be considered.