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发明授权
CN101506261B 聚丙烯泡沫体 有权

聚丙烯泡沫体
摘要：
本发明涉及包含聚丙烯的泡沫体，其中所述聚丙烯是在金属茂催化剂存在下生产的，并且所述泡沫体和/或所述聚丙烯具有：a)小于1.00的支化指数g′，和b)在180℃的温度下通过1.00s-1的形变速率dε/dt测定的至少0.30的应变硬化指数(SHI@1s-1)，其中所述应变硬化指数(SHI)被定义为在1和3之间的Hencky应变范围内，作为Hencky应变以10为底的对数(lg(ε))的函数的、拉伸应力增长函数以10为底的对数(lg(ηE+))的斜率。
摘要（英）：

The present invention relates to a foam comprising a polypropylene, wherein said polypropylene is produced in the presence of a metallocene catalyst, and the foam and/or the polypropylene has (have) a) a branching index g' of less than 1.00 and b) a strain hardening index (SHI@1s<-1>) of at least 0.30 measured by a deformation rate depsilon/dt of 1.00s<-1> at a temperature of 180 DEG C, wherein the strain hardening index (SHI) is defined as the slope of the logarithm to the basis 10 of the tensile stress growth function (Iog(etaE<+>) as a function of the logarithm to the basis 10 of the Hencky strain (log(epsilon)) in the range of Hencky strains between 1 and 3.

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