Process for producing cyclic polyarylene sulfide
    1.
    发明授权
    Process for producing cyclic polyarylene sulfide 有权
    环状聚芳硫醚的制备方法

    公开(公告)号:US08329832B2

    公开(公告)日:2012-12-11

    申请号:US12528924

    申请日:2008-02-27

    IPC分类号: C08F75/00

    摘要: A method for producing a cyclic polyarylene sulfide, wherein a cyclic polyarylene sulfide is produced by heating a reaction mixture which is composed of at least a linear polyarylene sulfide (a), a sulfidizing agent (b), a dihalogenated aromatic compound (c) and an organic polar solvent (d). This method for producing a cyclic polyarylene sulfide is characterized in that not less than 1.25 liters of the organic polar solvent is used per 1 mole of the sulfur content in the reaction mixture. This method enables to efficiently produce a cyclic polyarylene sulfide, more specifically cyclic oligoarylene sulfide by an economical and simple process in short time.

    摘要翻译: 一种环状聚芳硫醚的制造方法,其中通过加热由至少线型聚芳硫醚(a),硫化剂(b),二卤化芳香族化合物(c)和 有机极性溶剂(d)。 该环状聚芳硫醚的制造方法的特征在于,相对于反应混合物中的1摩尔硫含量,使用不小于1.25升的有机极性溶剂。 该方法能够在短时间内通过经济且简单的方法有效地制备环状聚芳硫醚,更具体地说是环状低聚芳硫醚。

    Method of manufacturing a surface layer modified, molded article of
aromatic polymer and the article so produced
    2.
    发明授权
    Method of manufacturing a surface layer modified, molded article of aromatic polymer and the article so produced 失效
    制造芳族聚合物的表面层改性的模塑制品的方法和如此制备的制品

    公开(公告)号:US5698325A

    公开(公告)日:1997-12-16

    申请号:US599472

    申请日:1996-01-23

    摘要: Molded articles of an aromatic polymer are described having at least a portion of the surface layer of the polymer modified by a heterogeneous reaction of the solid polymer and a reactive solution. The polymer to be treated may contain different repeating units in the said surface layer. The treatment to produce the molded article may comprise casting, injection molding, extending or otherwise shaping the polymer to mold the polymer into a desired shape. The heterogeneous treatment to produce the heterogeneously modified molded article may comprise treating a surface layer of a flat cast sheet in the form of a flat membrane, spirally wound membrane, hollow fiber, or tubular material.

    摘要翻译: 描述了芳族聚合物的模塑制品,其具有通过固体聚合物和反应性溶液的非均相反应改性的聚合物的表面层的至少一部分。 待处理的聚合物可以在所述表面层中含有不同的重复单元。 生产模塑制品的处理可以包括铸塑,注射成型,延伸或以其它方式成型聚合物,以将聚合物模塑成所需的形状。 用于生产非均相改性的模塑制品的非均相处理可以包括以扁平膜,螺旋卷绕膜,中空纤维或管状材料的形式处理扁平铸片的表面层。