ESR Studies on Fracture Mechanism of Solid Polymers Induced by Mechanical Fracture

固体聚合物机械断裂诱导断裂机理的ESR研究

• 批准号: 03650736
• 负责人: SAKAGUCHI Masato
• 金额: $ 1.28万
• 依托单位: Ichimura Gakuen Junior College
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03650736/
• 关键词: ESR; Polymer Materials; Fracture Mechanism; Heterolytic Scission; Mechano anion; Mechano Cation; Ionic Yield; 高分子材料の機械的破壊; ポリビニリデンフルオライド; 炭素ー炭素結合の不均一切断; カチオン重合; イソブチルビニルエーテル; ポリイソブチルビニルエーテル; 機械的破壊; イオン的開裂; スピントラップ法; アニオンラジカル; 電子スピン共鳴法; テ

We speculated that a mehcano anion and a mechano cation were produced by a heterolytic carbon-carbon bond scission due to the mechanical fracture of solid polymer.The production of the mechano anions was assigned by a detection of tetracyano ethylene anion radical (TCNE^<・^^->) from polymers fractured with TCNE in vacuo in the dark at 77 K using ESR method. The mechano anions were obtained from polytetrafluoroethylene (PTFE), polyethylene (PE), polypropylene (PP), and polyvinylidenefluouride (PVDF).The yields of the mechano anions (ratios of the heterolytic carbon-carbon bond scission) were obtained as PTFE (16 %), PE (27 %), PP(37 %), and PVDF (85 %)The production of PVDF mechano cation was assigned by the detection of polyisobutylvinylether (PIBVE) produced by a cationic polymerization on isobutylvinylether (IBVE) initiated by PVDF mechano cation. The molecular weights of PIBVE were obtained as Mw=6.2 X 10^4, Mn=2.3 X 10^4.We concluded that the mechano anions and the mechano cations were produced by the homolytic carbon-carbon bond scission of polymer main chain due to mechanical fracture of solid polymers, and the ionic yield was affected by a polarity of the carbon-carbon bond due to an electron affinity of substitution groups attached to the polymer chain.

我们推测，由于固体聚合物的机械断裂，通过杂碳 - 碳键科学产生了Mehcano阴离子和机械阳离子。机械阴离子的产生是通过使用Polymers fractracre fract fractrire fract fract fract fract tace in frol facue facue facue facue facue in froct in fract in fract in fract in fract in fracte in froct in fracte in froce in face in face in face in face in face in froct in frocte face。机械阴离子是从聚二氟乙烯（PTFE），聚乙烯（PE），聚丙烯（PP）和聚乙烯基二烯氟化物（PVDF）获得的。 PVDF（85％）通过检测由PVDF机械阳离子引发的异丁基乙醚（IBVE）产生的PVDF机械阳离子的产生。 The molecular weights of PIBVE were obtained as Mw=6.2 x 10^4, Mn=2.3 x 10^4.We concluded that the mechano anions and the mechano cations were produced by the homolytic carbon-carbon bond science of polymer main chain due to mechanical fracture of solid polymers, and the ionic yield was affected by a polarity of the carbon-carbon bond due to an electron affinity of substitution groups attached to聚合物链。

项目成果

Masato Sakaguchi: "A Generation Mechanism of Triboelectricity due to the Reaction of Mechano Radicals with Mechano Anions which are Produced by Mecahnical Fracture of Solid Polymer" Colloid & Polym, Sci.270. 621-626 (1992)

坂口正人：“由于机械自由基与固体聚合物机械断裂产生的机械阴离子反应而产生摩擦电的机制”胶体

Masao SAKAGUCHI: ""A Generation Mechanism of Triboelectricity due to the Reaction of Mechano Radicals with Mechano Anions which are Produced by Mechanical Fracture of Solid Polymer"" Colloid & Polym.Sci.270. 621-626 (1992)

坂口正男：“由于机械自由基与固体聚合物机械断裂产生的机械阴离子反应而产生摩擦电的机制”胶体

Sakaguchi,Masato: "A Generation Mechanism of Triboelectricity due to the Reaction of Mechano radicals with Mechano anions which are Produced by Mechanical Fracture of Solid Polymer" Colloid & Polym.Sci.,. 270. 621-626 (1992)

坂口正人：“由于机械自由基与固体聚合物机械断裂产生的机械阴离子反应而产生摩擦电的机制”胶体