Pulse radiolysis investigation of · OH and · H radicals initiated degradation reaction of sulfonated aromatics as
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- 作者：Jianhua Zu ; Ruiqin Liu ; Yuezhou Wei ; Puyin Wang…
- 关键词：Pulse radiolysis ; Isopropyl benzene sulfonic acid ; tert ; Butyl benzene sulfonic acid ; Radicals ; Proton exchange membrane ; Oxidative degradation
- 刊名：Research on Chemical Intermediates
- 出版年：2016
- 出版时间：April 2016
- 年：2016
- 卷：42
- 期：4
- 页码：2883-2898
- 全文大小：1,807 KB
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Ruiqin Liu (1)
Yuezhou Wei (1)
Puyin Wang (1)
Haiying Fu (2)
Fangdong Tang (3)
Linfeng He (3)
1. School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China
2. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China
3. Shanghai Institute of Measurement and Testing Technology, Shanghai, 201203, China - 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Catalysis
Physical Chemistry
Inorganic Chemistry - 出版者：Springer Netherlands
- ISSN：1568-5675
文摘
In order to predict · OH and · H radicals initiated degradation of proton exchange membrane (PEM) based on polymers obtained by radiation-induced grafting of styrene or α-methylstyrene on different polyolefin, isopropyl benzene sulfonic acid (IPBS) and tert-butyl benzene sulfonic acid (TBBS) were taken as model compounds for PEM with and without α-H, respectively. Results indicated that · OH radicals played a vital role in PEM degradation. Eighty-nine percent of · OH radicals reacted with IPBS to form benzylic radicals by electron transfer and subsequent deprotonation reactions. Benzylic radicals can react with O2 to form peroxyl radicals, which leads to PEM degradation. TBBS, without α-H, reacted with · OH or · H radicals, benzylic radicals would not be generated, and only adducts were formed. Adducts have less influence on the stability of TBBS than benzylic radicals. In this work, we elucidated that PEM, without α-H, with similar structures to TBBS, had a stronger resistance to oxidative degradation than PEM with α-H, with similar structures to IPBS.