应用化学 ›› 1991, Vol. 0 ›› Issue (1): 85-87.

• 研究简报 • 上一篇    下一篇

聚醚砜紫外光氧化降解的ESR研究

李明, 栗宜明, 吴忠文, 汤心颐   

  1. 吉林大学化学系, 长春 130023
  • 收稿日期:1989-01-27 修回日期:1990-06-12 出版日期:1991-02-10 发布日期:1991-02-10

ESR STUDIES ON PHOTOOXIDATION AND PHOTODE GRADATION OF POLYETHERSULPHONE

Li Ming, Li Yiming, Wu Zhongwen, Tang Xinyi   

  1. Department of Chemistry, Jilin University, Changchun 130023
  • Received:1989-01-27 Revised:1990-06-12 Published:1991-02-10 Online:1991-02-10

摘要: 与聚砜相比,聚醚砜(PES)由于没有异丙基,因而具有更好的耐热性和耐辐射性。Lyons[1]等曾用ESR方法研究了聚砜在γ射线辐照下的降解,发现辐射产生的自由基主要是苯氧基(ArO·)、苯砜基(ArSO2)、过氧基(ROO·)和环已二烯自由基。本文用ESR方法研究了PES的光氧化降解过程并提出了可能的降解机理。

关键词: 聚醚砜, 光氧化降解, ESR

Abstract: The oxidation and degradation of polyethersulphone (PES) in UV-light have been stu-died through ESR measurment.Two kinds of radicals, probably ArO- and ArOO·were foundoriginally in PES with g values of 2.004 and 2.001 respectirely.Upon UV-light irradiationthe contents of the radicals increased and a new signal appeared in the ESR spectrum.Apossible mechanism of oxidation and degradation of PES is proposed.

Key words: PES, photooxidation, photodegradation, ESR