Studies on the thermal stability of the perfluorinated cation-exchange membrane Nafion-417
Tóm tắt
The thermal stability of the perfluorinated cationexchange membrane Nafion-417 was determined by means of simultaneous TG-DTA. The individual decomposition stages were studied via IR spectroscopy and ion-exchange capacity determinations. Nafion-417 is thermally stable up to 280 ‡C. Above this temperature, sulfonic groups present in the membrane are split off (T
max
= 345 ‡C. In the temperature range 420–590 ‡C, oxidative destruction of the perfluorinated matrix occurs, which is accompanied by practically total weight loss.
Tài liệu tham khảo
1 A. Eisenberg and H. L. Yeager, Perfluorinated Ionomer Membranes, ACS Symp. Ser. No 180, Washington 1982, chapters 14–19.
J. Surowiec, Przem. Chem., 65 (1986) 409.
H. J. R. Maget, Handbookof Fuel Cell Technology, Prentice-Hall, Englewood Cliffs, New York 1967.
R. Bogoczek and J. Surowiec, Chem.-Ing-Tech., 59 (1987) 178.
C. Heitner-Wirguin, Polymer, 20 (1979) 371.
A. Eisenberg and M. King, Ion Containing Polymers, Polymer Physics Volume 2, Academic Press 1977 (and references therein).
J. Ostrowska and A. Narebska, Colloid and Polymer Sci., 261/1983.
S. C. Yeo and A. Eisenberg, J. Appl. Polym. Sci., 21 (1977) 875.
M. Lopez, B. Kipling and H. L. Yeager, Anal: Chem. 48 (1976) 1120 and 49 (1977) 629.