{"title":"Effect of Processing History on Flow-Induced Crystallization of Polyethylene With Long-Chain Branches","authors":"Kenta Komatsu, Naoki Yamano, Masayuki Yamaguchi","doi":"10.1002/app.57259","DOIUrl":null,"url":null,"abstract":"<div>\n \n <p>The effect of applied processing history on rheological properties and flow-induced crystallization is studied in polyethylene with long-chain branches that is prepared using a metallocene catalyst. The sample processed by a two-roll mill, in which elongational flow is dominant, shows marked strain hardening in transient elongational viscosity, as well as prompt crystallization once shear flow is further applied. In contrast, strain hardening in transient elongational viscosity and shear-induced crystallization are not prominent after passing through a single-screw extruder. These results suggest that shear-dominant flow in the extruder weakens the role of long-chain branches on rheological properties, known as shear modification, and flow-induced crystallization.</p>\n </div>","PeriodicalId":183,"journal":{"name":"Journal of Applied Polymer Science","volume":"142 31","pages":""},"PeriodicalIF":2.8000,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Applied Polymer Science","FirstCategoryId":"92","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/app.57259","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}
引用次数: 0
Abstract
The effect of applied processing history on rheological properties and flow-induced crystallization is studied in polyethylene with long-chain branches that is prepared using a metallocene catalyst. The sample processed by a two-roll mill, in which elongational flow is dominant, shows marked strain hardening in transient elongational viscosity, as well as prompt crystallization once shear flow is further applied. In contrast, strain hardening in transient elongational viscosity and shear-induced crystallization are not prominent after passing through a single-screw extruder. These results suggest that shear-dominant flow in the extruder weakens the role of long-chain branches on rheological properties, known as shear modification, and flow-induced crystallization.
期刊介绍:
The Journal of Applied Polymer Science is the largest peer-reviewed publication in polymers, #3 by total citations, and features results with real-world impact on membranes, polysaccharides, and much more.