固定化单位点催化剂原位合成超高分子量聚乙烯/氧化石墨烯纳米复合材料

A. Heidari, S. Talebi, M. Rezaei, Hasan Keshavarz-Mirzamohamadi, Elchin Jafariyeh-Yazdi
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引用次数: 3

摘要

摘要研究了甲基铝氧烷在氧化石墨(GO)表面固定单位点催化剂的方法。采用固定化催化剂进行乙烯聚合,得到了缠结密度小的超高分子量聚乙烯/氧化石墨烯纳米复合材料。观察到聚合物链锚定在氧化石墨烯纳米片上对聚合物的拉伸性、机械性能和热性能有显著影响。通过显微技术验证了晶片和纳米片的取向和位置。此外,x射线分析表明,在拉伸过程中,氧化石墨烯在UHMWPE相中分散,UHMWPE/GO纳米复合材料的结晶度增强。
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In Situ Synthesis of Ultrahigh Molecular Weight Polyethylene/Graphene Oxide Nanocomposite Using the Immobilized Single-site Catalyst
ABSTRACTWe address the immobilization of single-site catalyst on the graphite oxide (GO) surface using methylaluminoxane. Ethylene polymerization was performed using the immobilized catalyst and the nanocomposite of ultrahigh molecular weight polyethylene (UHMWPE)/GO with less entanglement density was obtained. It was observed that the drawability, mechanical and thermal properties of the produced polymer significantly are affected by the anchoring of polymer chains to the GO nanosheets. The orientation and location of crystalline lamellae and nanosheets were verified by microscopic techniques. Besides, X-ray analysis demonstrated the dispersion of GO within the UHMWPE phase and crystallinity of UHMWPE/GO nanocomposites enhanced during drawing process.
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来源期刊
Polymer-Plastics Technology and Engineering
Polymer-Plastics Technology and Engineering 工程技术-高分子科学
CiteScore
1.71
自引率
0.00%
发文量
0
审稿时长
4 months
期刊最新文献
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