Siteng Zhang, Thomas C. O’Connor, Gary S. Grest, Ting Ge
{"title":"Elastomer Mechanics of Cross-Linked Linear-Ring Polymer Blends","authors":"Siteng Zhang, Thomas C. O’Connor, Gary S. Grest, Ting Ge","doi":"10.1021/acsmacrolett.5c00095","DOIUrl":null,"url":null,"abstract":"Cross-linking a blend of linear and ring polymers creates a new topology-based dual-network elastomer in which the two components differ significantly in their topology. We use molecular simulations and topological analysis to examine key mechanical properties as functions of ring polymer volume fraction ϕ<sub>R</sub>. For ϕ<sub>R</sub> < ϕ<sub>R</sub><sup>*</sup>, where the rings begin to overlap, the network shear modulus <i>G</i> and the maximum stretch ratio λ<sub>p</sub> are weakly dependent on ϕ<sub>R</sub>. For ϕ<sub>R</sub> > ϕ<sub>R</sub><sup>*</sup>, entanglements trapped in the network are diluted as the rings overlap, leading to a significant decrease in <i>G</i> and an increase in λ<sub>p</sub> with increasing ϕ<sub>R</sub>. The peak tensile stress, σ<sub>p</sub>, exhibits a maximum around ϕ<sub>R</sub><sup>*</sup>, indicating an enhancement of network strength due to the stronger cohesion from the entanglements between linear and ring polymers.","PeriodicalId":18,"journal":{"name":"ACS Macro Letters","volume":"75 1","pages":""},"PeriodicalIF":5.2000,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Macro Letters","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1021/acsmacrolett.5c00095","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}
引用次数: 0
Abstract
Cross-linking a blend of linear and ring polymers creates a new topology-based dual-network elastomer in which the two components differ significantly in their topology. We use molecular simulations and topological analysis to examine key mechanical properties as functions of ring polymer volume fraction ϕR. For ϕR < ϕR*, where the rings begin to overlap, the network shear modulus G and the maximum stretch ratio λp are weakly dependent on ϕR. For ϕR > ϕR*, entanglements trapped in the network are diluted as the rings overlap, leading to a significant decrease in G and an increase in λp with increasing ϕR. The peak tensile stress, σp, exhibits a maximum around ϕR*, indicating an enhancement of network strength due to the stronger cohesion from the entanglements between linear and ring polymers.
期刊介绍：
ACS Macro Letters publishes research in all areas of contemporary soft matter science in which macromolecules play a key role, including nanotechnology, self-assembly, supramolecular chemistry, biomaterials, energy generation and storage, and renewable/sustainable materials. Submissions to ACS Macro Letters should justify clearly the rapid disclosure of the key elements of the study. The scope of the journal includes high-impact research of broad interest in all areas of polymer science and engineering, including cross-disciplinary research that interfaces with polymer science.
With the launch of ACS Macro Letters, all Communications that were formerly published in Macromolecules and Biomacromolecules will be published as Letters in ACS Macro Letters.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
