Perfluorinated Ionomer Membranes - download pdf or read online

By Adi Eisenberg, Howard L. Yeager

ISBN-10: 0841206988

ISBN-13: 9780841206984

ISBN-10: 0841208735

ISBN-13: 9780841208735

content material: Thermodynamic experiences of the water-perfluorosulfonated polymer interactions : experimental effects / M. Escoubes and M. Pineri --
Cation alternate selectivity of a perfluorosulfonate polymer / Howard L. Yeager --
shipping homes of perfluorosulfonate polymer membranes / Howard L. Yeager --
Solubility parameter of perfluorosulfonated polymer / Richard S. Yeo --
Mechanical relaxations in perfluorosulfonate ionomer membranes / Thein Kyu and Adi Eisenberg --
Nuclear magnetic resonance reviews and the idea of ion pairing in perfluorosulfonate ionomers / R.A. Komoroski and K.A. Mauritz --
Infrared spectra of perfluorosulfonated polymer and of water in perfluorosulfonated polymer / Michael Falk --
Mössbauer spectroscopy of perfluorosulfonated polymer membranes : constitution of the ionic section / B. Rodmacq, J.M.D. Coey, and M. Pineri --
Morphology of perfluorosulfonated membrane items : wide-angle and small-angle X-ray stories / T.D. Gierke, G.E. Munn, and F.C. Wilson --
constitution of sulfonated and carboxylated perfluorinated ionomer membranes : small-angle and wide-angle X-ray scattering and lightweight scattering / Takeji Hashimoto, Mineo Fujimura, and Hiromichi Kawai --
Neutron experiences of perfluorosulfonated polymer buildings / M. Pineri, R. Duplessix, and F. Volino --
The cluster-network version of ion clustering in perfluorosulfonated membranes / T.D. Gierke and W.Y. Hsu --
Electrosynthesis with perfluorinated ionomer membranes in chlor-alkali cells / Ronald L. Dotson and Kenneth E. Woodard --
Perfluorocarboxylic acid membrane and membrane chlor-alkali strategy built by way of Asahi Chemical / Maomi Seko, Shinsaku Ogawa, and Kyoji Kimoto --
Perfluorinated ion alternate membranes / Toshikatsu Sata and Yasuharu Onoue --
Perfluorocarboxylate polymer membranes / Hiroshi Ukihashi and Masaaki Yamabe --
purposes of perfluorosulfonated polymer membranes in gasoline cells, electrolyzers, and cargo leveling units / Richard S. Yeo --
normal functions of perfluorinated ionomer membranes / Brian Kipling.

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Extensive i n t r u s i o n s of f l u o r o c a r b o n m a t e r i a l i n t o i o n c l u s t e r e d r e g i o n s i s i n f e r r e d f r o m t h e s e r e s u l t s ( 1 9 ) . L e e and M e i s e l have s t u d i e d t h e m i c r o e n v i r o n m e n t o f the R u ( I I ) - 2 , 2 b i p y r i d i n e c o m p l e x i n N a f i o n , and a l s o f i n d e v i d e n c e f o r e x t e n s i v e i n t e r a c t i o n o f t h i s c a t i o n w i t h f l u o r o c a r b o n phase ( 2 1 ) . A model o f N a f i o n w h i c h i s c o n s i s t e n t w i t h i o n i c d i f f u s i o n a l r e s u l t s and w i t h t h e above o b s e r v a t i o n s h a s b e e n p r o p o s e d ( 7 ) .

S i n c e t h e o v e r a l l w a t e r s o r p t i o n d e c r e a s e s s m o o t h l y as t h e C s i o n i c f r a c t i o n i n ­ c r e a s e s , b o t h N a and C s d i f f u s i o n c o u l d be s t u d i e d as a f u n c t i o n o f p o l y m e r w a t e r c o n t e n t . R e s u l t s a r e shown i n F i g u r e 2 ( 7 ) . The f u n c t i o n V / ( 1 - V ) , where V i s the volume f r a c t i o n o f p o l y m e r i n a w a t e r s w o l l e n m a t e r i a l , i s p l o t t e d as t h e a b s c i s s a i n F i g u r e 2.

The r e s u l t , 9 x 10"* cm sec" , indicates that this a n i o n i s more m o b i l e t h a n c e s i u m i o n , b u t l e s s t h a n a s o d i u m i o n . T h i s i s a l s o somewhat u n u s u a l . In general, co-ion d i f f u s i o n coeff i c i e n t s a r e s e e n t o be l a r g e r t h a n t h o s e o f c o u n t e r i o n s i n i o n e x c h a n g e r s , b e c a u s e no e l e c t r o s t a t i c a t t r a c t i o n s t o t h e p o l y m e r phase e x i s t . (The membrane c o n c e n t r a t i o n i s o n l y 5 x 10"" mol L " t h o u g h , r e f l e c t i n g t h e e f f e c t s o f Donnan e x c l u s i o n p r o c e s s e s ( 4 ) .

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Perfluorinated Ionomer Membranes by Adi Eisenberg, Howard L. Yeager


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