Positron annihilation lifetime study of graft-type fluorinated polymer electrolyte membranes

摘要：

Positron annihilation lifetime spectroscopy (PALS) measurements were performed on polymer electrolyte membranes (PEMs) synthesized by radiation-induced graft polymerization of styrene into crosslinked-polytetrafluoroethylene (cPTFE) films and subsequent sulfonation. The base cPTFE and polystyrene grafted films were also measured as references. The cPTFE based PEM was found to have free-volume holes with different radius of 0.28-0.30 nm and 0.44-0.45 nm. The larger holes may be located in PTFE amorphous regions, while the smaller ones are considered to exist in both PTFE crystallites and poly(styrene sulfonic acid) grafts containing no water.

关键词： Polymer electrolyte membrane Radiation grafting Positron annihilation lifetime

作者: Shin-ichi Sawada Atsuo Kawasuso Masaki Maekawa Akihiro Suzuki Takayuki Terai Yasunari Maekawa

作者单位: Quantum Beam Science Directorate,Japan Atomic Energy Agency,1233 Watanuki,Takasaki,Gunma 370-1292,Ja Quantum Beam Science Directorate,Japan Atomic Energy Agency,1233 Watanuki,Takasaki,Gunma 370-1292,Ja Department of Nuclear Engineering and Management,Graduate School of Engineering,The University of To

会议类型: 国际会议

会议名称: 第九届国际正电子与正电子素国际会议(9th International Workshop on Positron and Positronium Chemistry)(PPC–9)

会议地点: 武汉

会议语种:英文

页码: 70-72

在线出版日期: 2008-05-11（万方平台首次上网日期，不代表论文的发表时间）