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    • 37. 发明授权
    • Aqueous emulsion polymerization of functionalized fluoromonomers
    • 官能化含氟单体的水乳液聚合
    • US07071271B2
    • 2006-07-04
    • US10697768
    • 2003-10-30
    • Arne ThalerKlaus HintzerKai H. LochhaasFranz MaerzSteven J. Hamrock
    • Arne ThalerKlaus HintzerKai H. LochhaasFranz MaerzSteven J. Hamrock
    • C08F114/18
    • C08F214/18C08F214/184
    • A method is provided for aqueous emulsion co-polymerization of two or more fluoromonomers comprising the steps of: 1) forming an aqueous pre-emulsion by mixing a fluoromonomer according to formula I: F2C═CF—R1—SO2X  (I) wherein R1 is a branched or unbranched perfluoroalkyl, perfluoroalkoxy or perfluoroether group comprising 1–15 carbon atoms and 0–4 oxygen atoms and wherein X is F, Cl or Br, together with 0.001–0.9 molar equivalents of a base, in the absence of added emulsifier; and 2) reacting the pre-emulsion with one or more perfluorinated comonomers in the absence of added emulsifier so as to form a fluoropolymer latex comprising a fluoropolymer wherein more than 1 mol % of monomer units are derived from the fluoromonomer according to formula I. In another aspect, the present invention provides a fluoropolymer derived from the fluoropolymer latex made according to the method of the present invention which is free of added emulsifier. In another aspect, the present invention provides a polymer electrolyte membrane comprising the fluoropolymer made according to the method of the present invention which is free of added emulsifier.
    • 提供了一种用于两种或更多种含氟单体的水乳液共聚的方法,包括以下步骤:1)通过混合式I的含氟单体形成水性预乳液:<?in-line-formula description =“In-line 公式“end =”lead“?> F 2 C-CF-R 1 -SO 2 X(I)<βin-line -formulae description =“In-line Formulas”end =“tail”?>其中R 1是支链或非支链全氟烷基,包含1-15个碳原子和0-4个氧原子的全氟烷氧基或全氟醚基团 在不加入乳化剂的情况下,X是F,Cl或Br,以及0.001-0.9摩尔当量的碱; 和2)在不存在加入的乳化剂的情况下使预乳液与一种或多种全氟化共聚单体反应,以便形成含氟聚合物的含氟聚合物胶乳,其中大于1mol%的单体单元衍生自根据式I的含氟单体。 另一方面,本发明提供了衍生自根据本发明的方法制备的含氟聚合物胶乳的氟聚合物,其不含添加的乳化剂。 另一方面,本发明提供了一种聚合物电解质膜,其包含根据本发明的方法制备的含氟聚合物,其不含添加的乳化剂。
    • 39. 发明授权
    • Polymer electrolytes crosslinked by ultraviolet radiation
    • 通过紫外线辐射交联的聚合物电解质
    • US07060738B2
    • 2006-06-13
    • US10733211
    • 2003-12-11
    • Naiyong JingSteven J. HamrockMichael A. Yandrasits
    • Naiyong JingSteven J. HamrockMichael A. Yandrasits
    • C08F2/46
    • C08J3/28C08F14/18C08J5/225C08J2327/12
    • A method is provided for making a crosslinked polymer electrolyte, typically in the form of a membrane for use as a polymer electrolyte membrane in an electrolytic cell such as a fuel cell, as well as the polymer so made, the method comprising application of ultraviolet radiation to a highly fluorinated fluoropolymer comprising: a backbone derived in part from tetrafluoro-ethylene monomer, first pendent groups which include a group according to the formula —SO2X, where X is F, Cl, Br, OH or —O−M+, where M+ is a monovalent cation, and second pendent groups which include Br, Cl or I. Typically, the membrane has a thickness of 90 microns or less, more typically 60 or less, and most typically 30 microns or less.
    • 提供了一种制造交联聚合物电解质的方法,该电解质通常是在诸如燃料电池的电解槽中用作聚合物电解质膜的膜形式,以及如此制备的聚合物,该方法包括施加紫外线辐射 涉及一种高度氟化的含氟聚合物,其包含:部分由四氟乙烯单体衍生的主链,第一侧基,其包括根据式-SO 2 X的基团,其中X为F,Cl,Br, OH或-O - ,其中M + +是一价阳离子,第二侧基包括Br,Cl或I.通常 ,膜的厚度为90微米或更小,更通常为60或更小,最通常为30微米或更小。