ESR SPECTRA STUDIES ON POLYTETRAFLUOROETHYENE FILMS IRRADIATED BY RADIO FREQUENCY PLASMAS

Ma Yuguang; Yang Meiling; Shen Jiacong; Lin Dehou

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ESR SPECTRA STUDIES ON POLYTETRAFLUOROETHYENE FILMS IRRADIATED BY RADIO FREQUENCY PLASMAS

更新时间：2023-04-23

- ESR SPECTRA STUDIES ON POLYTETRAFLUOROETHYENE FILMS IRRADIATED BY RADIO FREQUENCY PLASMAS
- Journal of Radiation Research and Radiation Processing Vol. 9, Issue 4, Pages: 198-202(1991)
- 作者机构：
  
  1.吉林大学，长春
- 作者简介：
- 基金信息：
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Ma Yuguang, Yang Meiling, Shen Jiacong, et al. ESR SPECTRA STUDIES ON POLYTETRAFLUOROETHYENE FILMS IRRADIATED BY RADIO FREQUENCY PLASMAS. [J]. Journal of Radiation Research and Radiation Processing 9(4):198-202(1991)
DOI：

Ma Yuguang, Yang Meiling, Shen Jiacong, et al. ESR SPECTRA STUDIES ON POLYTETRAFLUOROETHYENE FILMS IRRADIATED BY RADIO FREQUENCY PLASMAS. [J]. Journal of Radiation Research and Radiation Processing 9(4):198-202(1991) DOI：

摘要

聚四氟乙烯膜经低温等离子体辐照，在其表面生成了过氧自由基。用ESR和自旋捕捉方法研究表明，过氧自由基分布在聚四氟乙烯表层的一定深度内，当两个过氧自由基互相接触时可以发生反应，生成端接过氧自由基。在烯类单体甲基丙烯酸甲酯存在时，过氧自由基可作为活性点，引发烯类单体在聚四氟乙烯表面上发生接枝共聚合。

Abstract

The PTFE films irradiated by Ar plasma were studied by using the method of ESR spectrometer. The peroxide free radicals were found on the surface of PTFE after plasma irradiation, which existed in the layer of some thickness of the surface. These free radicals were quite stable at room temperature. But when density of peroxide free radicals on the PTFE surface was big enough, terminational reaction between the peroxide free radicals cound happen and endoperoxides were formed on the PTFE surface. Also the density of peroxide free radical decreased with increasing temperature and underwent a sudden change with temperature reaching 399 K— the glass transition temperature of PTFE. The peroxide free radicals can be caught by free radical catcher PBN to form a stable free radical, also can react with MMA to form grafting layer.

关键词

等离子体聚四氟乙烯过氧自由基ESR

Keywords

PlasmaPTFEPeroxid free radicalESR

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