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首页> 外文期刊>Journal of Applied Polymer Science >Reactor blending of polyethylene with ethyl-bridged zirconocene catalyst and iron-based diimine complex
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Reactor blending of polyethylene with ethyl-bridged zirconocene catalyst and iron-based diimine complex

机译：聚乙烯与乙桥锆茂催化剂和铁基二亚胺配合物的反应器共混

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摘要

Blends of polyethylene (PE) were produced in a single reactor using a combination of {[(2-ArN=C(Me))(2)C5H3N]FeCl2} [Ar=2,6-2CH(3)(C6H4] and rac-Et(Ind)(2)ZrCl2. The experimental results showed that the PEs obtained have a broad molecular weight distribution (MWD) and both the molecular weight and the MWD can be regulated through changing the mole ratio of the two active sites. In addition, the polymerization activities decreased with the increase of the Fe/Zr mole ratio whereas the crystallinity of the PE obtained exhibited a contrary trend, decreasing as the Fe/Zr mole ratio went up. The morphology of the blends also directly relates to the Fe/Zr mole ratio, and more iron content in the bimetallic catalysts system gives rise to compact PEs of high crystallinity. This reflects that the reactor blends are morphology controllable as well and can be easily applied to present processing techniques because of adjustable molecular weights and their distribution. Differential scanning calorimetry, thermogravimetric analysis, gel permeation chromatography, and scanning electron microscopy were employed to characterize the properties of the reactor blends of PEs. (C) 2003 Wiley Periodicals, Inc. [References: 11]
机译：使用{[（2-ArN = C（Me））（2）C5H3N] FeCl2} [Ar = 2,6-2CH（3）（C6H4]和rac-Et（Ind）（2）ZrCl2。实验结果表明，所得PEs具有较宽的分子量分布（MWD），并且分子量和MWD均可通过改变两个活性位点的摩尔比进行调节。另外，随着Fe / Zr摩尔比的增加，聚合活性降低，而得到的PE的结晶度却呈现出相反的趋势，随着Fe / Zr摩尔比的增加而降低，共混物的形态也直接关系到Fe / Zr摩尔比。 Fe / Zr摩尔比和双金属催化剂体系中更多的铁含量产生了高结晶度的致密PE，这反映出反应器混合物的形态也是可控的，并且由于分子量和分子量可调节，因此很容易应用于当前的加工技术。它们的分布。计量，热重分析，凝胶渗透色谱和扫描电子显微镜用于表征PEs反应器共混物的性能。 （C）2003 Wiley Periodicals，Inc. [参考：11]

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