{"title":"Industrial Synthesis of Linear Low-Density Polyethylene with H-Shape Long-Chain-Branching Structures Using Ziegler-Natta Catalysts","authors":"Bingyu Zhang, Fengtao Chen, Jin-Yong Dong","doi":"10.1002/mren.202400044","DOIUrl":null,"url":null,"abstract":"<p>A novel linear low-density polyethylene containing H-shape long-chain-branching structures (LCB-LLDPE) is industrially synthesized with Ziegler-Natta catalysts and gas-phase polymerization process at the assistance of <i>ω</i>-alkenylmethyldichlorosilane copolymerization-hydrolysis chemistry. The incorporated LCB structures are characterized by NMR, SEC, and SAOS (small amplitude oscillatory shear) measurements. With a same-sourced plain LLDPE as a comparison benchmark, the new LCB-LLDPE is studied for its properties on various aspects, revealing, among others, significantly reinforced rheological properties, including enhanced shear-thinning behavior, a significant strain-hardening phenomenon in extensional flow, and substantially increased melt strength, as well as significantly improved optical properties, which all benefit its application in extrusion blow molding for thin-film production.</p>","PeriodicalId":18052,"journal":{"name":"Macromolecular Reaction Engineering","volume":"19 2","pages":""},"PeriodicalIF":1.8000,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Macromolecular Reaction Engineering","FirstCategoryId":"5","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/mren.202400044","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
A novel linear low-density polyethylene containing H-shape long-chain-branching structures (LCB-LLDPE) is industrially synthesized with Ziegler-Natta catalysts and gas-phase polymerization process at the assistance of ω-alkenylmethyldichlorosilane copolymerization-hydrolysis chemistry. The incorporated LCB structures are characterized by NMR, SEC, and SAOS (small amplitude oscillatory shear) measurements. With a same-sourced plain LLDPE as a comparison benchmark, the new LCB-LLDPE is studied for its properties on various aspects, revealing, among others, significantly reinforced rheological properties, including enhanced shear-thinning behavior, a significant strain-hardening phenomenon in extensional flow, and substantially increased melt strength, as well as significantly improved optical properties, which all benefit its application in extrusion blow molding for thin-film production.
期刊介绍：
Macromolecular Reaction Engineering is the established high-quality journal dedicated exclusively to academic and industrial research in the field of polymer reaction engineering.
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