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    • 10. 发明公开
    • Depolymerization of polymers and their use in thermoset compositions and composites
    • 聚合物的解聚及其在热固性组合物和复合材料中的应用
    • EP0532893A3
    • 1994-03-23
    • EP92113440.9
    • 1992-08-06
    • HERCULES INCORPORATED
    • Biswas, AtanuChan, Anita NgaiHuarng, Roger Jyh-ChiarngJabloner, HaroldSwetlin, Brian JosephWoodside, Andrew Bencich
    • C08G65/48C08L71/08C08L71/12C08L81/06C08L81/02C08J11/10C08G75/23
    • C08J11/10C08G65/48C08G75/0286C08G75/23C08J2381/06C08L81/02C08L81/06Y02W30/702
    • The present invention is a novel process of preparing a reactive reduced molecular weight polyarylene polyether from a starting polyarylene polyether, wherein said reduced molecular weight polyarylene polyether has a lower molecular weight than said starting polyarylene polyether. The process comprises the steps of first contacting said starting polyarylene polyether with a nucleophilic reagent for a period of time sufficient to reduce the molecular weight of said starting polyarylene polyether, and then recovering said reactive reduced molecular weight polyarylene polyether. The reactive reduced molecular weight polyarylenes produced by such process can be used in combination with various other resins. This process produces many novel reactive polyarylene polyethers represented by the formula

      wherein Ar is a bivalent aromatic residue of a polyarylene polyether, Ar may vary within said reactive polyarylene polyether, at least a portion of Ar comprises an aromatic ether or an aromatic thioether group that is ortho or para in position to at least one S0 2 group; E represents reactive groups having at least one reactive site, that are located at chain termini, along a chain, or both; z is the number average reactive sites per chain, 0.1 2 .
    • 本发明是一种由起始聚亚芳基聚醚制备活性降低分子量聚亚芳基聚醚的新方法,其中所述降低分子量聚亚芳基聚醚具有比所述起始聚亚芳基聚醚低的分子量。 该方法包括以下步骤:首先使所述起始聚亚芳基聚醚与亲核试剂接触一段足以降低所述起始聚亚芳基聚醚分子量的时间,然后回收所述活性降低分子量聚亚芳基聚醚。 通过这种方法生产的活性降低分子量聚亚芳基可以与各种其它树脂结合使用。 该方法产生了许多新的由下式表示的反应性聚亚芳基聚醚其中Ar是聚亚芳基聚醚的二价芳族残基,Ar可以在所述反应性聚亚芳基聚醚内变化,Ar的至少一部分包含芳族醚或芳族硫醚基, 邻位或对位至少一个SO 2基团; E代表具有至少一个反应位点的反应性基团,其位于链末端,沿链或两者; z是每个链的数均反应位点,0.1