Enhanced properties of polyethylene through in situ polymerization with siloxene‐supported vanadium‐based catalysts

IF 3.9 3区化学 Q2 POLYMER SCIENCE

Journal of Polymer Science Pub Date : 2024-09-13 DOI:10.1002/pol.20240334

Xin Yan, Yuying Zhou, Hao Wu, Chen Liu, Chenghan Huang, Weiwei He, Liang Fang, Hexin Zhang, Jianming Yang, KeunByoung Yoon

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Abstract

Two‐dimensional (2D) inorganic fillers can significantly improve the properties of polyolefins and broaden their application areas. In this study, high‐performance polyethylene (PE)/siloxene nanocomposites were prepared by in situ polymerization using layered siloxene‐supported vanadium (V)‐based catalysts. The siloxene‐supported V‐based catalysts have highly dispersed active sites and excellent catalytic performance for ethylene polymerization compared to VOCl3 catalysts. The catalytic activity of the siloxene‐supported V‐based catalysts for the polymerization of ethylene was significantly better than that of the VOCl3 catalysts at the same catalyst feed. During in situ polymerization, the layered siloxene fillers exhibited uniform dispersion in the PE matrix. Moreover, the addition of a very small amount (1.12 wt%) of siloxene filler significantly improved the thermal stability and mechanical performance of PE. Therefore, this study presents an effective method to fabricate PE with excellent properties.

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利用硅氧烷支撑的钒基催化剂原位聚合提高聚乙烯的性能

二维（2D）无机填料可显著改善聚烯烃的性能，拓宽其应用领域。本研究使用层状硅氧烷支撑的钒（V）基催化剂，通过原位聚合制备了高性能聚乙烯（PE）/硅氧烷纳米复合材料。与 VOCl3 催化剂相比，硅氧烷支撑的 V 基催化剂具有高度分散的活性位点和优异的乙烯聚合催化性能。在催化剂进料相同的情况下，硅氧烷支撑的 V 型催化剂对乙烯聚合的催化活性明显优于 VOCl3 催化剂。在原位聚合过程中，层状硅氧烷填料在聚乙烯基体中表现出均匀的分散性。此外，添加极少量（1.12 wt%）的硅氧烷填料可显著提高聚乙烯的热稳定性和机械性能。因此，本研究提出了一种制造具有优异性能的聚乙烯的有效方法。

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来源期刊

Journal of Polymer Science POLYMER SCIENCE-

CiteScore

6.30

自引率

5.90%

发文量

264

期刊介绍： Journal of Polymer Research provides a forum for the prompt publication of articles concerning the fundamental and applied research of polymers. Its great feature lies in the diversity of content which it encompasses, drawing together results from all aspects of polymer science and technology. As polymer research is rapidly growing around the globe, the aim of this journal is to establish itself as a significant information tool not only for the international polymer researchers in academia but also for those working in industry. The scope of the journal covers a wide range of the highly interdisciplinary field of polymer science and technology.