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    Title: Effects of Cooling Temperature and Aging Treatment on the Morphology of Nano- and Micro-Porous Poly(ethylene-co-vinyl alcohol)Membranes by Thermal Induced Phase Separation Method
    Authors: Chang, Hsu-Hsien;Beltsios, Konstantinos;Chen, Yih-Hang;Lin, Dar-Jong;Cheng, Liao-Ping
    Keywords: membranes;crystallization;ageing;nanostructured polymers;morphology
    Date: 2014-03-16
    Issue Date: 2019-03-30 12:11:38 (UTC+8)
    Publisher: Wiley Periodicals
    Abstract: Poly(ethylene‐co‐vinyl alcohol) (EVOH 32) / 1,3‐propanediol mixtures are processed by thermally induced phase separation for the formation of porous membranes. The crystallization line was determined both by the cloud‐point and DSC methods. Two precursor solution compositions, four quench temperatures and various aging times were explored. It is found possible to generate both polymer‐crystallization controlled morphologies (for high quenches and/or sufficiently aged dopes), especially globular microporous ones, and novel nano‐scale porous morphologies dominated by intra‐binodal phase separation (for low quenches and limited or no precursor solution aging). Structural characterization of the membranes was accomplished via application of scanning electron microscopy and wide angle X‐ray diffraction.
    Relation: Journal of Applied Polymer Science 131(12), p.40374
    DOI: 10.1002/app.40374
    Appears in Collections:[化學工程與材料工程學系暨研究所] 期刊論文

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