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Pervaporation separation of binary organic‐aqueous liquid mixtures using crosslinked PVA membranes. I. Characterization of the reaction between PVA and PAA
Author(s) -
Rhim JiWon,
Sohn MinYoung,
Joo HyeokJong,
Lee KewHo
Publication year - 1993
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.1993.070500413
Subject(s) - pervaporation , vinyl alcohol , membrane , differential scanning calorimetry , polymer chemistry , aqueous solution , acrylic acid , chemical engineering , materials science , chemistry , copolymer , organic chemistry , polymer , composite material , permeation , biochemistry , physics , engineering , thermodynamics
For the purposes of the water‐selective membrane material development for pervaporation separation, poly(vinyl alcohol) (PVA) was crosslinked with a low molecular weight of poly(acrylic acid) (PAA). The crosslinking reactions between PVA and PAA were characterized through IR spectroscopy, differential scanning calorimetry (DSC), and tensile tests when varying the reactions conditions, that is, time, temperature, amounts of cross‐linking agents, PAA. It was found that the crosslinking reaction was fast: in other words, that the reaction mainly occurred at the initial step of each reaction condition. The best reaction conditions for preparing the crosslinked PVA membranes were found to be: reaction time not over 1 h, reaction temperature in the range of 150–180°C. PAA contents of 15–20 wt % were found satisfactory with respect to the application areas. © 1993 John Wiley & Sons, Inc.