Poly-.alpha.-olefins
    1.
    发明授权
    Poly-.alpha.-olefins 失效
    聚-α-烯烃

    公开(公告)号:US5187250A

    公开(公告)日:1993-02-16

    申请号:US813057

    申请日:1991-12-23

    摘要: A poly-.alpha.-olefin of novel structure which is an addition polymer of an .alpha.-olefin having 4 carbon atoms or more, wherein (a) by the analysis of the peaks attributable to the side chain methylene groups directly bonded to the main chain in the .sup.13 C-NMR spectrum produced by the measurement in 1,2,4-trichloro-benzene, (i) a novel main peak not attributable to the isotactic structure thereof is positioned on the side of higher magnetic field than is the peak attributable to the isotactic structure, and (ii) the intensity of said main peak is 0.3 or more relative to the sum of the intensities of the total peaks attributable to the side chain methylene groups directly bonded to the main chain, and (b) the molecular weight measured by gel permeation chromatography and calculated as polypropylene is not less than 1,000.

    摘要翻译: 一种新型结构的聚α-烯烃,它是具有4个碳原子或更多碳原子的α-烯烃的加成聚合物,其中(a)通过分析直接键合到主链上的侧链亚甲基的峰 通过在1,2,4-三氯苯中测量产生的13 C-NMR光谱,(i)不能归因于其全同立构结构的新颖主峰位于比归因于 全同立构结构,和(ii)所述主峰的强度相对于直接键合到主链上的侧链亚甲基的总峰的强度之和为0.3以上,(b)测定的分子量 通过凝胶渗透色谱法测定,其聚丙烯计算值不小于1,000。

    Polypropylene fiber and a preparation process thereof
    3.
    发明授权
    Polypropylene fiber and a preparation process thereof 失效
    聚丙烯纤维及其制备方法

    公开(公告)号:US5478646A

    公开(公告)日:1995-12-26

    申请号:US15056

    申请日:1993-02-08

    IPC分类号: D01F6/06 D02G3/00

    摘要: A fiber excellent in strength and having an average size of 10,000-0.1 denier can be obtained by extruding a raw material composed mainly of a polypropylene having a syndiotactic pentad fraction of 0.7 or more and optionally stretching the resulting extruded material.By using as the raw material a composition consisting of two kinds of polypropylenes each having an intrinsic viscosity .eta..sub.1 or .eta..sub.2, the log(.eta..sub.2 /.eta..sub.1) being more than 0.05 or less than -0.05, and a syndiotactic pentad fraction of 0.7 or more at a weight ratio of 95:5-5:95 or a composition consisting of at least 50 parts by weight of a syndiotactic polypropylene having the intrinsic viscosity .eta..sub.1 and a syndiotactic pentad fraction of 0.7 or above and at most 50 parts by weight of an isotactic polypropylene having the intrinsic viscosity .eta..sub.2, the extrudability is improved and the fiber stretching conditions are broadened.

    摘要翻译: 通过将主要由间同立构五单元组分为0.7以上的聚丙烯组成的原料挤出并任选地拉伸所得的挤出材料,可以获得强度优异且平均粒径为10,000-0.1旦尼尔的纤维。 通过使用由两种各自具有特性粘度eta 1或eta 2的聚丙烯组成的组合物,log(eta 2 / eta 1)大于0.05或小于-0.05,并且间同立构五单元组分数 0.7重量%以上,重量比为95:5.5:95的组合物或由至少50重量份的特性粘度η1和间同立构五单元组分数为0.7以上至多50份的间同立构聚丙烯组成的组合物 的特性粘度等于2的全同立构聚丙烯,可挤出性提高,纤维拉伸条件变宽。