{"title":"The elastic modulus of isolated polytetrafluoroethylene filaments","authors":"Patrick Drawe, N. Lüttschwager, M. Suhm","doi":"10.14293/S2199-1006.1.SOR-MATSCI.AKA0J6.V2","DOIUrl":null,"url":null,"abstract":"We report vibrational Raman spectra of small extended perfluoro- n -alkanes (C n F 2 n +2 with n = 6, 8 – 10, 12 – 14) isolated in supersonic jet expansions and use wavenumbers of longitudinal acoustic vibrations to extrapolate the elastic modulus of cold, isolated polytetrafluoroethylene filaments. The derived value E = 209(10) GPa defines an upper limit for the elastic modulus of the perfectly crystalline, noninteracting polymer at low temperatures and serves as a benchmark for quantum chemical predictions.","PeriodicalId":91169,"journal":{"name":"ScienceOpen research","volume":"268 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2014-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ScienceOpen research","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.14293/S2199-1006.1.SOR-MATSCI.AKA0J6.V2","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
We report vibrational Raman spectra of small extended perfluoro- n -alkanes (C n F 2 n +2 with n = 6, 8 – 10, 12 – 14) isolated in supersonic jet expansions and use wavenumbers of longitudinal acoustic vibrations to extrapolate the elastic modulus of cold, isolated polytetrafluoroethylene filaments. The derived value E = 209(10) GPa defines an upper limit for the elastic modulus of the perfectly crystalline, noninteracting polymer at low temperatures and serves as a benchmark for quantum chemical predictions.
我们报道了在超音速射流膨胀中孤立的小扩展的全氟- n -烷烃(C n F 2 n +2, n = 6,8 - 10,12 - 14)的振动拉曼光谱，并使用纵向声学振动的波数来推断冷的、孤立的聚四氟乙烯细丝的弹性模量。推导值E = 209(10) GPa定义了低温下完美结晶、无相互作用聚合物弹性模量的上限，并作为量子化学预测的基准。
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