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Abstract

The variation of lamellar structures of poly(styrenesulfonic acid)-grafted poly (ethylene-co-tetrafluoroethylene) proton exchange membranes dependence on preparation procedures and grafting degree (GD) was investigated by small angle X-ray scattering. The detail structures of lamellar including lamellar period L, thickness of lamellar crystal Lc, thickness of lamellar amorphous La, and linear crystallinity Lc/L were examined by a 1D correlation function. The lamellar structures were recognized at the grafting step and did not change under the sulfonation process. With GD  79 %, Lc significantly decreased (corresponding to the increase of La) and then retained in the GDs of 79-117 %. Note that the retained values of Lc, La, and linear crystallinity in the GDs of 79-117 % are the origin of high conductivity and mechanical strength of membranes under severe operation conditions for fuel cell applications.



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Article Details

Issue: Vol 18 No 3 (2015)
Page No.: 153-161
Published: Aug 30, 2015
Section: Natural Sciences - Research article
DOI: https://doi.org/10.32508/stdj.v18i3.831

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Copyright: The Authors. This is an open access article distributed under the terms of the Creative Commons Attribution License CC-BY 4.0., which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

 How to Cite
Tran, T., Pham, H., Nguyen, A., Luong, A., & Luu, T. (2015). Study of lamellar structures of graft-type fluorinated proton exchange membranes by small-angle X-ray scattering: preparation procedures and grafting degree dependence for fuel application. Science and Technology Development Journal, 18(3), 153-161. https://doi.org/https://doi.org/10.32508/stdj.v18i3.831

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