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    • 6. 发明授权
    • Ultrathin high-performance hollow fiber membranes
    • 超薄高性能中空纤维膜
    • US6015516A
    • 2000-01-18
    • US100094
    • 1998-06-19
    • Tai-Shung ChungXudong HuSoo Khean Teoh
    • Tai-Shung ChungXudong HuSoo Khean Teoh
    • D01D5/24D01D5/247D01F6/66
    • D01D5/247D01D5/24D01F6/66
    • A process for forming ultrathin dense-layer asymmetric hollow fiber membranes with a dense layer of less than 500 .ANG. from a binary solution system comprising a polymer and a solvent. In this process, the spinning polymeric solution has a high viscosity and exhibits chain entanglement at the spinning temperature. The solubility parameter difference between the bore fluid and the spinning dope is less than 2.5 (cal/cm.sup.3).sup.0.5 and the volume ratio of bore-fluid flow rate to the dope flow rate is between 0.45 to 0.75. The dope is wet-spun into hollow fibers using water as external coagulant. The ultrathin dense-layer asymmetric hollow fiber membranes are suitable for air and other gas separations.
    • 一种从包含聚合物和溶剂的二元溶液体系形成具有小于500安培的致密层的超薄致密层不对称中空纤维膜的方法。 在该方法中,纺丝聚合物溶液具有高粘度并且在纺丝温度下表现出链缠结。 孔流体和纺丝原液之间的溶解度参数差异小于2.5(cal / cm3)0.5,孔流体流速与涂料流速的体积比在0.45至0.75之间。 将涂料用水作为外部凝结剂湿法纺丝成中空纤维。 超薄致密层不对称中空纤维膜适用于空气和其他气体分离。
    • 8. 发明授权
    • Membranes prepared from blend of polybenzimidazole with polyarylates
    • 由聚苯并咪唑与聚芳酯混合制备的膜
    • US4842740A
    • 1989-06-27
    • US228624
    • 1988-08-05
    • Tai-Shung ChungPaul N. Chen, Sr.Vincent J. Provino
    • Tai-Shung ChungPaul N. Chen, Sr.Vincent J. Provino
    • B01D71/48B01D71/62C08J5/18C08L67/00C08L67/03C08L79/04
    • C08L67/03B01D71/48B01D71/62C08L79/04
    • This invention discloses novel membranes comprised of a blend of polyarylate and polybenzimidazole polymers. A membrane prepared from the blend of polybenzimidazole and polyarylate polymers exhibits enhanced properties over membranes prepared solely from either a polyarylate or a polybenzimidazole polymer. The addition of the polyarylate to the polybenzimidazole membrane allows the composition to be more thermally processable and less susceptible to moisture. The presence of the polybenzimidazole renders the polyarylate less reactive to solvents and increases its thermal stability. In addition, it has been surprisingly found that membranes prepared from the polybenzimidazole polyarylate blends show high regeneration capacity while retaining good flux ranges. The membranes prepared by this process exhibit good separation characteristics and provide an improved membrane with enhanced qualities over prior art membranes.
    • 本发明公开了由多芳基化合物和聚苯并咪唑聚合物的共混物组成的新型膜。 由聚苯并咪唑和聚芳酯聚合物的共混物制备的膜在仅由多芳基化合物或聚苯并咪唑聚合物制备的膜上表现出增强的性能。 将多芳基化合物加入到聚苯并咪唑膜中可使组合物具有更好的热可加工性,并且不易受潮气影响。 聚苯并咪唑的存在使多芳基化合物对溶剂的反应性降低,并增加其热稳定性。 此外,已经令人惊奇地发现,由聚苯并咪唑多芳基化合物共混物制备的膜显示出高再生能力,同时保持良好的通量范围。 通过该方法制备的膜显示出良好的分离特性,并提供与现有技术膜相比具有增强质量的改进的膜。
    • 9. 发明授权
    • Melt-extrusion of polymer which is capable of forming an anisotropic
melt phase to form large shaped articles exhibiting improved polymeric
orientation
    • 能够形成各向异性熔融相的聚合物的熔融挤出以形成具有改进的聚合物取向的大型制品
    • US4734240A
    • 1988-03-29
    • US822091
    • 1986-01-24
    • Tai-Shung ChungSunil K. GargDaniel Palangio
    • Tai-Shung ChungSunil K. GargDaniel Palangio
    • B29C47/00B29C47/28B29C47/86B29C47/88
    • B29C47/28B29C47/0004B29C47/86B29C47/864B29C47/0014B29C47/0021B29C47/0026B29C47/003B29K2105/0079
    • An improved technique is provided to melt-extrude a liquid crystalline polymer to form large elongated solid shaped articles which exhibit significantly improved polymeric orientation. The molten polymer which is capable of forming an anisotropic melt phase is extruded through a converging die that is provided with at least one enclosed cooling zone at an interior location within the flowing molten polymer wherein a cooling fluid is circulated. This cools the molten polymer adjacent the cooling zone with the concomitant increase in its melt viscosity. Such increased melt viscosity at the interior of the stream of the molten polymer contributes to the uniformity of the polymeric orientation imparted within the converging die as well as during subsequent drawdown outside the extrusion orifice. Such improved polymeric orientation leads to the formation of an improved product (e.g., a three-dimensional rod) which exhibits an unusually high tensile modulus in the direction of its length. The present invention accordingly overcomes difficulties encountered in the prior art wherein melt-extruded shaped articles significantly larger than fibers heretofore often have exhibited substantial internal heterogeneity and a highly oriented skin and a core of a substantially lesser polymeric orientation.
    • 提供了一种改进的技术来熔融挤出液晶聚合物以形成显着改善的聚合物取向的大型细长固体成形制品。 能够形成各向异性熔融相的熔融聚合物通过在流动的熔融聚合物内的内部位置设置有冷却流体循环的至少一个封闭的冷却区的会聚模挤出。 这样使冷却区附近的熔融聚合物冷却,伴随着其熔体粘度的增加。 在熔融聚合物流内部的这种增加的熔体粘度有助于在会聚模具内以及随后在挤压孔外部的压下之间施加的聚合物取向的均匀性。 这种改进的聚合物取向导致形成在其长度方向表现出非常高的拉伸模量的改进的产品(例如,三维棒)。 因此,本发明克服了现有技术中遇到的困难,其中明显大于迄今为止的纤维的熔融挤出成型制品经常表现出显着的内部异质性和高度取向的皮肤和基本上较小的聚合物取向的芯。
    • 10. 发明申请
    • BLENDS FROM BRANCHED POLYARYL ETHERS AND HYDROPHILIC POLYMERS
    • 分散式聚合物和水解聚合物的共混
    • US20100197859A1
    • 2010-08-05
    • US12677022
    • 2008-08-27
    • Martin WeberChristian MaletzkoQian YangTai-Shung Chung
    • Martin WeberChristian MaletzkoQian YangTai-Shung Chung
    • C08L99/00C08L39/06C08L29/04C08L37/00C08L77/00
    • B01D71/58B01D67/0011B01D69/087B01D71/44B01D71/52B01D71/66B01D71/76B01D2323/30B01D2325/24B01D2325/28B01D2325/36C08G65/40C08L39/06C08L71/02C08L81/06C08L2205/05C08L2666/04C08L2666/22
    • The present invention provides polymer blends comprising the components (a) from 40% to 95% by weight of at least one polyaryl ether copolymer constructed of (a1) from 50% to 99.9% by weight of building units of the general formula I and from 0% to 40% by weight of further building units II selected from segments of one or more thermoplastic polymers, and (a2) from 0.1% to 10% by weight of at least one crosslinker V having at least three hydroxyl functionalities, the at least one crosslinker V being present in component (a) in converted form and the sum total of % by weight for (a1) and (a2) being 100% by weight, and (b) from 5% to 60% by weight of at least one hydrophilic polymer selected from polyvinylpyrrolidone, polyvinylpyrrolidone copolymers, polyethylene glycol, polypropylene glycol, copolymers of ethylene glycol and propylene glycol, water-soluble cellulose derivatives, polyamide, polyvinyl acetate and polyvinyl alcohol, where the sum total of % by weight for components (a) and (b) is 100% by weight. The present invention also provides combinations of distinct components (a) and (b) for conjoint use. The invention further provides polymer membranes comprising the aforementioned polymer blends and also a process for their production and the use of the polymer membranes for producing dialysis filters. The present invention also provides dialysis filters comprising the aforementioned hollow fiber membranes.
    • 本发明提供了聚合物共混物,其包含组分(a)40重量%至95重量%的至少一种由(a1)50至99.9重量%的通式I的构建单元构成的至少一种聚芳基醚共聚物, 0%至40%重量的选自一种或多种热塑性聚合物的段的另外的建筑单元II,和(a2)0.1%至10%重量的至少一种具有至少三个羟基官能团的交联剂V,至少 一种交联剂V以转化形式存在于组分(a)中,(a1)和(a2)的重量%的总和为100重量%,和(b)至少5重量%至60重量% 一种选自聚乙烯吡咯烷酮,聚乙烯吡咯烷酮共聚物,聚乙二醇,聚丙二醇,乙二醇和丙二醇的共聚物,水溶性纤维素衍生物,聚酰胺,聚乙酸乙烯酯和聚乙烯醇的亲水性聚合物,其中组分(a )和 (b)为100重量%。 本发明还提供了用于联合使用的不同组分(a)和(b)的组合。 本发明还提供了包含上述聚合物共混物的聚合物膜,以及它们的生产方法和用于生产透析过滤器的聚合物膜的用途。 本发明还提供了包含上述中空纤维膜的透析过滤器。