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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/44223

    Title: Formation of particulate microporous poly(vinylidene fluoride) membranes by isothermal immersion precipitation from the 1-octanol/dimethylformamide/poly(vinylidene fluoride) system
    Authors: 鄭廖平;Cheng, Liao-ping;Young, Tai-horng;Fang, Lin;Gau, Jy-jie
    Contributors: 淡江大學化學工程與材料工程學系
    Keywords: Poly(vinylidene fluoride);Phase diagram;Membrane
    Date: 1999-04
    Issue Date: 2010-03-09 10:04:11 (UTC+8)
    Publisher: London: Elsevier Ltd
    Abstract: Phase diagrams were determined for poly(vinylidene fluoride) (PVDF) and a terpolymer of vinylidene fluoride, hexafluoropropylene, and tetrafluoroethylene (VDF/HFP/TFE) in solutions composed of 1-octanol and dimethylformamide at 25°C. From the measured gelation and liquid–liquid phase separation data, binary interaction parameters were computed using a modified Flory–Huggins theory. PVDF microporous membranes were then prepared by isothermal immersion precipitation processes in various doping conditions. The formed membrane exhibited a particulate morphology characterized by a uniform package of spherical particles of identical size. These particles were identified to be full spherulites of PVDF using scanning electron microscopy, differential scanning calorimetry and small angle light scattering techniques.
    Relation: Polymer 40(9), pp.2395-2403
    DOI: 10.1016/S0032-3861(98)00462-5
    Appears in Collections:[Graduate Institute & Department of Chemical and Materials Engineering] Journal Article

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