Hierarchical Structure–Property Relationships in Graft-Type Fluorinated Polymer Electrolyte Membranes Using Small- and Ultrasmall-Angle X-ray Scattering Analysis

2014 ◽  
Vol 47 (7) ◽  
pp. 2373-2383 ◽  
Author(s):  
Tran Duy Tap ◽  
Shin-ichi Sawada ◽  
Shin Hasegawa ◽  
Kimio Yoshimura ◽  
Yojiro Oba ◽  
...  
Keyword(s):  
Polymer Electrolyte ◽  
Hierarchical Structure ◽  
Polymer Electrolyte Membranes ◽  
Structure Property ◽  
X Ray ◽  
Fluorinated Polymer ◽  
Structure Property Relationships ◽  
X Ray Scattering ◽  
Electrolyte Membranes ◽  
Ray Scattering

scholarly journals Investigation of the Lamellar Grains of Graft-type Polymer Electrolyte Membranes for Hydrogen Fuel Cell Application using Ultrasmall-angle X-ray Scattering

2021 ◽  
Author(s):  
Lam Hoang Hao ◽  
Dinh Tran Trong Hieu ◽  
Tran Hoang Long ◽  
Dang Van Hoa ◽  
Tran Thanh Danh ◽  
...  
Keyword(s):  
Polymer Electrolyte ◽  
Polymer Electrolyte Membranes ◽  
Operating Conditions ◽  
Hydrogen Fuel Cell ◽  
X Ray ◽  
X Ray Scattering ◽  
Fuel Cell Application ◽  
Electrolyte Membranes ◽  
Poly Ethylene ◽  
Ray Scattering

The extensive ultrasmall-angle X-ray scattering measurements are performed in order to investigate the changes of lamellar grains of poly(styrenesulfonic acid)-grafted poly(ethylene-co-tetrafluoroethylene) polymer electrolyte membranes (ETFE-PEMs) that occur during the alteration of grafting degree (GD) under dry and immersed conditions. The lamellar grains of three series of the samples (polystyrene-grafted ETFE films and dry and hydrated ETFE-PEMs) are formed during the grafting process and develop independently with the change of the lamellar stacks. Interestingly, three series of samples exhibit a very similar trend of lamellar grain at any GD and a significant amount of graft chains is observed directly in the region between the grains (GD £ 59%) and outside of the grain network structures (GD > 59%). This observation indicates: i) The formation of the lamellar grains; ii) The rapid changes in characteristic sizes of the lamellar grains compared with the lamellar stacks; and iii) The newly generated phases consisting of only the graft materials. These findings explain why the lamellar grains and the graft chains play an important role in the higher proton conductivity and compatible tensile strengths of the membranes, compared with Nafion, at the immersed and severe operating conditions.  

Structure–property relationships of aramid fibers via X-ray scattering and atomic force microscopy

2019 ◽  
Vol 54 (8) ◽  
pp. 6668-6683 ◽  
Author(s):  
Michael R. Roenbeck ◽  
Julia Cline ◽  
Vincent Wu ◽  
Mehdi Afshari ◽  
Steve Kellner ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Structure Property ◽  
Aramid Fibers ◽  
X Ray ◽  
Force Microscopy ◽  
Structure Property Relationships ◽  
X Ray Scattering ◽  
Atomic Force ◽  
Ray Scattering

Structure-Property Relations in Polymers and Polymer Blends Using X-Ray Diffraction Technique

2017 ◽  
pp. 122-138
Author(s):  
Somashekarappa H ◽  
Manjunath Alabur
Keyword(s):  
Polymer Blends ◽  
In Situ Polymerization ◽  
Profile Analysis ◽  
Bimodal Distribution ◽  
Line Profile Analysis ◽  
Structure Property ◽  
X Ray ◽  
Microstructural Parameters ◽  
X Ray Scattering ◽  
Ray Scattering

This chapter discusses about the synthesis and characterization of polymers, polymer blends, polymer composites, and polymer nanocomposites. Electrically conductive blends polyaniline dodecyl benzene sulphonic acid (Pani:DBSA)/Styrene Butadiene Styrene (SBS) block copolymer have been prepared by melt mixing and using in situ polymerization method. The microstructural parameters were computed using wide angle X-ray scattering (WAXS) and Small angle X-ray scattering (SAXS). Bimodal distribution method has been studied for SBS, DCH32 cotton fiber and Pure Mysore multi-voltine silk (PMS) samples using Line profile analysis.

Sign in / Sign up

Export Citation Format

Share Document