提高UHMWPE†可加工性的策略

Clement G. Collins Rice, Alexander Evans, Zoë R. Turner, Jirut Wattoom and Dermot O'Hare
{"title":"提高UHMWPE†可加工性的策略","authors":"Clement G. Collins Rice, Alexander Evans, Zoë R. Turner, Jirut Wattoom and Dermot O'Hare","doi":"10.1039/D4IM00104D","DOIUrl":null,"url":null,"abstract":"<p>Ultra-high molecular weight polyethylene (UHMWPE, <em>M</em><small><sub>w</sub></small> &gt; 10<small><sup>6</sup></small> g mol<small><sup>−1</sup></small>) has been prepared using slurry-phase titanium permethylindenyl-phenoxy (PHENI*) catalysts. Four strategies have been investigated for improving the melt processability of UHMWPE, which is the chief limiting factor to the applications of this high-performance polymer. 1) Active site engineering was used to explore the entanglement density in the resulting polymer, with substantially disentangled PE identified through thermal and rheological characterisation. 2) Hydrogen and ZnEt<small><sub>2</sub></small> were employed as chain transfer agents to modulate the polyethylene molecular weight and distribution (MWD). A sequential reactivity protocol using ZnEt<small><sub>2</sub></small> was able to produce bimodal UHMWPE with improved processability. 3) MWD tuning was further investigated using multisite catalysts, with the reaction conditions and Ti : Zr ratio able to control MWD to essentially arbitrary shapes. The inclusion of low molecular weight fractions into UHMWPE improves the processability without compromising mechanical characteristics. 4) Polymer-reinforced composite blends of UHMWPE with either HDPE or LDPE as a highly processable matrix were extruded and explored, with polymer miscibility and mechanical properties studied in detail.</p><p>Keywords: Ultra-high molecular weight polyethylene; Processability; Molecular weight distribution; Polymer composites; Chain transfer agents.</p>","PeriodicalId":29808,"journal":{"name":"Industrial Chemistry & Materials","volume":" 2","pages":" 178-190"},"PeriodicalIF":0.0000,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/im/d4im00104d?page=search","citationCount":"0","resultStr":"{\"title\":\"Strategies for enhancing the processability of UHMWPE†\",\"authors\":\"Clement G. Collins Rice, Alexander Evans, Zoë R. Turner, Jirut Wattoom and Dermot O'Hare\",\"doi\":\"10.1039/D4IM00104D\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Ultra-high molecular weight polyethylene (UHMWPE, <em>M</em><small><sub>w</sub></small> &gt; 10<small><sup>6</sup></small> g mol<small><sup>−1</sup></small>) has been prepared using slurry-phase titanium permethylindenyl-phenoxy (PHENI*) catalysts. Four strategies have been investigated for improving the melt processability of UHMWPE, which is the chief limiting factor to the applications of this high-performance polymer. 1) Active site engineering was used to explore the entanglement density in the resulting polymer, with substantially disentangled PE identified through thermal and rheological characterisation. 2) Hydrogen and ZnEt<small><sub>2</sub></small> were employed as chain transfer agents to modulate the polyethylene molecular weight and distribution (MWD). A sequential reactivity protocol using ZnEt<small><sub>2</sub></small> was able to produce bimodal UHMWPE with improved processability. 3) MWD tuning was further investigated using multisite catalysts, with the reaction conditions and Ti : Zr ratio able to control MWD to essentially arbitrary shapes. The inclusion of low molecular weight fractions into UHMWPE improves the processability without compromising mechanical characteristics. 4) Polymer-reinforced composite blends of UHMWPE with either HDPE or LDPE as a highly processable matrix were extruded and explored, with polymer miscibility and mechanical properties studied in detail.</p><p>Keywords: Ultra-high molecular weight polyethylene; Processability; Molecular weight distribution; Polymer composites; Chain transfer agents.</p>\",\"PeriodicalId\":29808,\"journal\":{\"name\":\"Industrial Chemistry & Materials\",\"volume\":\" 2\",\"pages\":\" 178-190\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-10-18\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://pubs.rsc.org/en/content/articlepdf/2025/im/d4im00104d?page=search\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Industrial Chemistry & Materials\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://pubs.rsc.org/en/content/articlelanding/2025/im/d4im00104d\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Industrial Chemistry & Materials","FirstCategoryId":"1085","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2025/im/d4im00104d","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0

摘要

超高分子量聚乙烯(UHMWPE, Mw >;采用浆相苯氧基钛(PHENI*)催化剂制备了106 g mol−1)。研究了提高超高分子量聚乙烯熔体可加工性的四种策略,这是限制这种高性能聚合物应用的主要因素。1)利用活性位点工程研究了聚合物的缠结密度,通过热学和流变学表征确定了基本解缠的PE。2)以氢和ZnEt2作为链转移剂调节聚乙烯分子量和分子量分布。使用ZnEt2的顺序反应性协议能够生产双峰UHMWPE,并提高了可加工性。3)利用多位点催化剂进一步研究了随钻曲线的调整,反应条件和Ti: Zr比可以将随钻曲线控制为任意形状。在UHMWPE中加入低分子量组分可以在不影响机械特性的情况下提高可加工性。4)以高密度聚乙烯(HDPE)或低密度聚乙烯(LDPE)为高可加工性基体的超高分子量聚乙烯(UHMWPE)聚合物增强共混物进行了挤压和探索,详细研究了聚合物的混相和力学性能。关键词:超高分子量聚乙烯;加工性能;分子量分布;聚合物复合材料;链转移剂。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Strategies for enhancing the processability of UHMWPE†

Strategies for enhancing the processability of UHMWPE†

Ultra-high molecular weight polyethylene (UHMWPE, Mw > 106 g mol−1) has been prepared using slurry-phase titanium permethylindenyl-phenoxy (PHENI*) catalysts. Four strategies have been investigated for improving the melt processability of UHMWPE, which is the chief limiting factor to the applications of this high-performance polymer. 1) Active site engineering was used to explore the entanglement density in the resulting polymer, with substantially disentangled PE identified through thermal and rheological characterisation. 2) Hydrogen and ZnEt2 were employed as chain transfer agents to modulate the polyethylene molecular weight and distribution (MWD). A sequential reactivity protocol using ZnEt2 was able to produce bimodal UHMWPE with improved processability. 3) MWD tuning was further investigated using multisite catalysts, with the reaction conditions and Ti : Zr ratio able to control MWD to essentially arbitrary shapes. The inclusion of low molecular weight fractions into UHMWPE improves the processability without compromising mechanical characteristics. 4) Polymer-reinforced composite blends of UHMWPE with either HDPE or LDPE as a highly processable matrix were extruded and explored, with polymer miscibility and mechanical properties studied in detail.

Keywords: Ultra-high molecular weight polyethylene; Processability; Molecular weight distribution; Polymer composites; Chain transfer agents.

求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Industrial Chemistry & Materials
Industrial Chemistry & Materials chemistry, chemical engineering, functional materials, energy, etc.-
自引率
0.00%
发文量
0
期刊介绍: Industrial Chemistry & Materials (ICM) publishes significant innovative research and major technological breakthroughs in all aspects of industrial chemistry and materials, with a particular focus on the important innovation of low-carbon chemical industry, energy and functional materials. By bringing researchers, engineers, and policymakers into one place, research is inspired, challenges are solved and the applications of science and technology are accelerated. The global editorial and advisory board members are valued experts in the community. With their support, the rigorous editorial practices and dissemination ensures your research is accessible and discoverable on a global scale. Industrial Chemistry & Materials publishes: ● Communications ● Full papers ● Minireviews ● Reviews ● Perspectives ● Comments
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信