Ethylene-alpha-olefin copolymers and molded article thereof
    8.
    发明公开
    Ethylene-alpha-olefin copolymers and molded article thereof 失效
    乙烯-α-烯烃Copolymere und daraus hergestellte Formteile。

    公开(公告)号:EP0640627A1

    公开(公告)日:1995-03-01

    申请号:EP94306168.9

    申请日:1994-08-22

    IPC分类号: C08F210/16

    摘要: A novel ethylene-α-olefin copolymer and a molded article formed therefrom, wherein

    (A) a density is 0.870 to 0.945 g/cm 3,
    (B) a relation between an activation energy of flow Ea (J/mole K) obtained by measurement of viscoelasticity at at least three temperatures in the molten state and a melt flow rate MFR (g/10 min) satisfies the following equation (1): logEa ≧ 4.6 - 0.04 × logMFR
    (C) a coefficient Cx of variation of chemical composition distribution represented by the following equation (2) is 0.40 to 0.80: Cx = σ/SCB ave wherein σ is a standard deviation of chemical composition distribution (1/1,000 C) and SCB ave is the average of short chain branchings per 1,000 C (1/1,000 C), and
    (D) a ratio of a weight average molecular weight Mw to a number average molecular weight Mn (Mw/Mn) is 3 to 20.

    摘要翻译: 一种新型乙烯-α-烯烃共聚物和由其形成的模塑制品,其中(A)密度为0.870至0.945g / cm 3,(B)流动活化能Ea(J /摩尔K) 通过在熔融状态下至少三个温度下的粘弹性测定得到的熔体流动速率MFR(g / 10分钟)满足下式(1):(C)表示化学成分分布的变化系数Cx 通过下式(2)为0.40至0.80:其中sigma是化学组成分布的标准偏差(1 / 1,000℃),SCBave是每1000℃(1 / 1,000℃)的短链分支的平均值, 和(D)重均分子量Mw与数均分子量Mn(Mw / Mn)的比例为3〜20。