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Pervaporation membranes prepared by radiochemical grafting of N‐vinylpyrrolidone onto films
Author(s) -
Morel G.,
Jozefonvicz J.,
Aptel P.
Publication year - 1979
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1979.070230817
Subject(s) - tetrafluoroethylene , pervaporation , membrane , grafting , materials science , polymer chemistry , chemical engineering , etfe , diffusion , polyethylene , n vinylpyrrolidone , chemistry , polymer , copolymer , permeation , composite material , thermodynamics , physics , layer (electronics) , biochemistry , engineering
The pervaporation performances of membranes obtained by radiation grafting of N‐vinylpyrrolidone onto poly(tetrafluoroethylene), polyethylene, polybutene, and poly(dimethylsiloxane) films were studied using a water–dioxane azeotropic mixture. The influence of the following parameters was examined: grafting ratios, radiation dose rates, nature of the base films, poly(tetrafluoroethylene) film‐making methods, and structural transition. An attempt has been made to interpret the results in terms of variations in the number, size, and density of the grafted domains which form the diffusion paths for the permeating molecules. Based on this interpretation, a general rule is proposed for selecting adpated methods to prepare efficient pervaporation membranes.