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    • 7. 发明授权
    • Star polymers and process for the preparation thereof
    • 星形聚合物及其制备方法
    • US4108945A
    • 1978-08-22
    • US663541
    • 1976-03-03
    • Lewis J. FettersLe-Khac Bi
    • Lewis J. FettersLe-Khac Bi
    • C08F8/00C08C19/44C08G81/02C08F297/04
    • C08G81/022C08C19/44
    • Disclosed is a series of star polymer products having at least three polymeric arms which radiate from a nucleus having at least two molecules of a linking compound. The polymeric arms may be copolymers of conjugated dienes and monovinyl aromatic compounds and/or homopolymers of either monomer. A novel process for the preparation of the polymer products includes the steps of forming the polymeric arms with an organometallic initiator to form polymers terminated by an active chain end and thereafter forming a nucleus with the simultaneous linking of the active chain ends thereto. The nucleus is formed from at least two molecules of a linking compound each having at least two functional groups.
    • 公开了一系列具有至少三个聚合物臂的星形聚合物产物,其从具有至少两个连接化合物分子的核辐射。 聚合物臂可以是共轭二烯和单乙烯基芳族化合物的共聚物和/或任一单体的均聚物。 用于制备聚合物产品的新方法包括以下步骤:用有机金属引发剂形成聚合物臂,以形成由活性链端封端的聚合物,然后通过将活性链末端同时连接而形成核。 细胞核由至少两个分子具有至少两个官能团的连接化合物形成。
    • 9. 发明授权
    • Disentangled chain telechelic polymers
    • 断开链式遥爪聚合物
    • US5238634A
    • 1993-08-24
    • US817573
    • 1992-01-07
    • Lewis J. FettersEdward N. KresgeDavid Lohse
    • Lewis J. FettersEdward N. KresgeDavid Lohse
    • B29C55/00B29D7/01C08J5/18D01F6/30
    • C08J5/18B29C55/005B29D7/01D01F6/30B29K2096/04B29K2105/0061C08J2323/16
    • The present invention provides a process for producing high elongation elastomers and highly oriented films and fibers from polymers having specific associative groups, such that the end groups on each macromolecule tend to associate with one another after the macromolecules are in a disentangled state, i.e., in the form of a semi-dilute solution. This association is of a force strong enough to prevent the macromolecular chains from slipping past one another and reentangling when the polymer is moderately heated or further concentrated in solution. The association may be manipulated, i.e., is reversible, under a change in parameter such as temperature, pH, polarity of the solvent medium and like parameters. The associated polymer macromolecules can be drawn as a gel from a semi-dilute solution into a highly aligned disentangled polymer to yield shaped articles.
    • 本发明提供了一种用于由具有特定缔合基团的聚合物制备高伸长弹性体和高取向膜和纤维的方法,使得每个高分子上的端基在大分子处于解缠状态之后倾向于相互结合,即,在 半稀释溶液的形式。 该缔合是具有足够强度的力,以防止大分子链彼此滑动并且当聚合物适度加热或进一步在溶液中浓缩时重新连接。 可以在诸如温度,pH,溶剂介质的极性等参数的变化等操作,即可逆的关联。 相关联的聚合物大分子可以作为凝胶从半稀释溶液中拉伸成高度对准的解缠结聚合物以产生成型制品。