頁籤選單縮合
題名 | Effect of Quenching Temperature on the Morphology and Separation Properties of Polypropylene Microporous Tubular Membranes via Thermally Induced Phase Separation= |
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作者 | Yang,M. -C.; Perng,J. -S.; |
期刊 | Journal of Polymer Research |
出版日期 | 19981000 |
卷期 | 5:4 1998.10[民87.10] |
頁次 | 頁213-219 |
分類號 | 346.84 |
語文 | eng |
關鍵詞 | Polypropylene; Tubular membrane; Thermally induced phase separation; Pure water permeability; Retention; |
英文摘要 | Polypropylene microporous tubular membranes were prepared by using camphene as solvent and through thermally induced phase separation at various quenching temperatures. Characterization of the resulting membrane included scanning electron microscopy, differential scanning calorirmetry, and wide angle X-ray scattering. Microscopic observation showed that the membrane was composed of spherical clusters and had a leafy structure. The crystallinity increased with the quenching temperature. The crystalline structure was of smectic form . Permeation performance was also determined, including pure water permeability and retention of dextran. The results showed that at lower quenching temperatures, the sturcture of membrane was denser. Therefore, the permeability was lower and the retention was higher. |
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