Improvement of Performance Characteristics of Polymer Materials by Direct Fluorination
A. P. KHARITONOV
Institute for Energy Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka,
Moscow Region 142432 (Russia) E-mail: khariton@binep.ac.ru
Pages: 625-630
Abstract
The fundamental features of direct fluorination of polymers and its potential commercial applications are described. The effects of the composition of the F2-He-N2-O2-HF fluorination mixture, fluorine pressure, temperature, and fluorination time on the formation rate and chemical composition of the fluorinated layer, as well as on the density, refractive index, surface energy, gas separation characteristics, and friction coefficient of the latter have been studied. Processes of formation and destruction of the long-lived and short-lived radicals, which are involved in the chain processes of the direct fluorination, have been investigated.
A description of the commercial applications of direct fluorination to improve some performance characteristics of polymeric articles is given. Among these characteristics are the selectivity of gas separation of polymeric membranes, barrier and adhesion characteristics.
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