{"title":"Ethylene Polymerization through Neutral Nickel Complexes Bearing Cyclic Imides","authors":"Hassan Arabi, M. S. Beheshti, A. Manteghi","doi":"10.1155/2022/8788585","DOIUrl":null,"url":null,"abstract":"The catalyst synthesis of salicylaldimine Ni(II) complexes with bulky imide moieties, ethylene polymerization, and characterization of synthesized polyethylenes are described in this paper. These Ni(II) complexes are designed to bear 2-aminobiphenyl and 4-tritylaniline. Results confirmed relatively high activity (up to \n \n 4\n ×\n \n \n 10\n \n \n 4\n \n \n \n g PE mol Ni-1 h-1) of these catalysts in ethylene polymerization. Moreover, Ni(II) complexes demonstrated enhanced thermal stability, maintaining activity level up to 80°C. The generated polyethylenes possess moderate branching density and high melting temperatures. Less bulky 2-aminobiphenyl group resulted in higher branch content, while in Ni(II) complexes bearing 4-tritylaniline, more linear structure was observed. These semicrystalline polyethylenes showed mechanical properties similar to thermoplastics.","PeriodicalId":7372,"journal":{"name":"Advances in Polymer Technology","volume":null,"pages":null},"PeriodicalIF":2.0000,"publicationDate":"2022-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advances in Polymer Technology","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1155/2022/8788585","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
The catalyst synthesis of salicylaldimine Ni(II) complexes with bulky imide moieties, ethylene polymerization, and characterization of synthesized polyethylenes are described in this paper. These Ni(II) complexes are designed to bear 2-aminobiphenyl and 4-tritylaniline. Results confirmed relatively high activity (up to
4
×
10
4
g PE mol Ni-1 h-1) of these catalysts in ethylene polymerization. Moreover, Ni(II) complexes demonstrated enhanced thermal stability, maintaining activity level up to 80°C. The generated polyethylenes possess moderate branching density and high melting temperatures. Less bulky 2-aminobiphenyl group resulted in higher branch content, while in Ni(II) complexes bearing 4-tritylaniline, more linear structure was observed. These semicrystalline polyethylenes showed mechanical properties similar to thermoplastics.
介绍了水杨醛二胺大体积亚胺配合物的催化剂合成、乙烯聚合及合成聚乙烯的表征。这些Ni(II)配合物被设计为含有2-氨基联苯和4-三苯胺。结果表明，这些催化剂在乙烯聚合中具有较高的活性(最高可达4 × 10 4 g PE mol Ni-1 h-1)。此外，Ni(II)配合物表现出增强的热稳定性，在80°C下保持活性水平。生成的聚乙烯具有中等的分支密度和较高的熔融温度。2-氨基联苯基体积较小，支链含量较高，而含4-三苯胺的Ni(II)配合物具有更多的线性结构。这些半结晶聚乙烯表现出与热塑性塑料相似的机械性能。
期刊介绍：
Advances in Polymer Technology publishes articles reporting important developments in polymeric materials, their manufacture and processing, and polymer product design, as well as those considering the economic and environmental impacts of polymer technology. The journal primarily caters to researchers, technologists, engineers, consultants, and production personnel.
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