Pervaporation separation of binary organic-aqueous liquid mixtures using crosslinked PVA membranes. I. Characterization of the reaction between PVA and PAA

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, differenti...

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Bibliographic Details
Published in:Journal of applied polymer science 1993-10, Vol.50 (4), p.679-684
Main Authors: Rhim, Ji-Won, Sohn, Min-Young, Joo, Hyeok-Jong, Lee, Kew-Ho
Format: Article
Language:English
Subjects:
320303 - Energy Conservation, Consumption, & Utilization- Industrial & Agricultural Processes- Equipment & Processes
360601 - Other Materials- Preparation & Manufacture
ALCOHOLS
Applied sciences
AQUEOUS SOLUTIONS
CHEMICAL REACTIONS
Chemical reactions and properties
CROSS-LINKING
Crosslinking, vulcanization
DISPERSIONS
EFFICIENCY
ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
ENERGY EFFICIENCY
Exact sciences and technology
FABRICATION
HYDROXY COMPOUNDS
MATERIALS SCIENCE
MEMBRANES
MIXTURES
ORGANIC COMPOUNDS
ORGANIC POLYMERS
Physicochemistry of polymers
POLYMERIZATION
POLYMERS
POLYVINYLS
PVA
SEPARATION PROCESSES
SOLUTIONS
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Summary: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.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.1993.070500413