Abstract

XRD crystallinity and density of PTFE produced by suspension polymerization were investigated after its irradiation above the melting point as a function of absorbed dose. Comparison of behavior of these two parameters with adsorbed dose revealed that original PTFE is highly porous, the irradiation decreasing substantially its porosity. A qualitative model of pore shrinking in PTFE during irradiation above the melting point was proposed, considering a viscous flow produced by surface tension.

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