Synthesis of branched polyethylene from ethylene stock by an interference-free tandem catalysis of TiCl4/MgCl2 and iron catalyst
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发布时间：2025-04-30
发布时间：2025-04-30
论文名称：Synthesis of branched polyethylene from ethylene stock by an interference-free tandem catalysis of TiCl4/MgCl2 and iron catalyst
发表刊物：Journal of Molecular Catalysis A: Chemical
摘要：An interference-free tandem catalysis based on iron catalyst and TiCl4/MgCl2, activated by MAO, was used to prepare branched polyethylene by polymerization of ethylene. No obvious deactivation due to the side reaction of catalysts and cocatalysts was detected during the reaction process, which commonly existed in tandem catalytic systems based on conventional Ziegler-Natta catalysts. A series of branched polyethylene with different properties have been prepared by adjusting of reaction temperature, Fe/Ti molar ratio and the amount of MAO used. The alteration of oligomers concentration in the reaction system, by changing of reaction conditions, led to the products with different branching degrees, thus the thermal properties and molecular weight. The products obtained in toluene at lower Fe/Ti ratios exhibited better morphology than those obtained at higher Fe/Ti ratios.
合写作者：Zhicheng Zhang; Zhanxia Lu; Youliang Hu
卷号：Volume: 236 Issue: 1-2
页面范围：87-93
是否译文：否
发表时间：2005-07-08