Polybenzimidazole Block Copolymers for Fuel Cell: Synthesis and Studies of Block Length Effects on Nanophase Separation, Mechanical Properties, and Proton Conductivity of PEM

2014 ◽  
Vol 6 (9) ◽  
pp. 6851-6864 ◽  
Author(s):  
Sudhangshu Maity ◽  
Tushar Jana
Keyword(s):  
Mechanical Properties ◽  
Fuel Cell ◽  
Block Copolymers ◽  
Proton Conductivity ◽  
Block Length ◽  
Cell Synthesis ◽  
Nanophase Separation ◽  
Length Effects

scholarly journals Coordination polymer glass from a protic ionic liquid: proton conductivity and mechanical properties as an electrolyte

2020 ◽  
Vol 11 (20) ◽  
pp. 5175-5181 ◽  
Author(s):  
Tomohiro Ogawa ◽  
Kazuki Takahashi ◽  
Sanjog S. Nagarkar ◽  
Koji Ohara ◽  
You-lee Hong ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Ionic Liquid ◽  
Fuel Cell ◽  
Coordination Polymer ◽  
Solid Electrolyte ◽  
Proton Conductivity ◽  
Protic Ionic Liquid ◽  
Proton Conducting ◽  
Polymer Glass

A proton-conducting coordination polymer glass derived from a protic ionic liquid works as a moldable solid electrolyte and the anhydrous fuel cell showed I–V performance of 0.15 W cm−2 at 120 °C.

A Study of the Nitrogen-Containing Heterocycles on Copolyimide Properties for Proton Exchange Membranes

2013 ◽  
Vol 401-403 ◽  
pp. 563-566 ◽  
Author(s):  
Yu Han Li ◽  
Wei Jian Wang ◽  
Yu Fei Chen ◽  
Lei Wang
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Proton Conductivity ◽  
Water Uptake ◽  
Main Chain ◽  
Proton Exchange Membranes ◽  
Proton Exchange ◽  
Membrane Properties ◽  
Dimensional Changes ◽  
Sulfonated Polyimide

Containing pyrimidine and pyridine monomers were incorporated respectively into the main chain of a sulfonated polyimide in order to investigate the effect of nitrogen-containing heterocycles on membrane properties such as water uptake and proton conductivity. With increasing content of the nitrogen-containing heterocycles, water uptake of membranes and dimensional changes remarkable decrease. The copolymer showed higher thermal stability (desulfonation temperature up to 330 °C) and reasonable good mechanical properties. These membranes also showed higher proton conductivity, which was comparable or even higher than Nafion 117.

Structural and mechanical properties of new block copolymers designed for biomedical use

Polymer ◽  
1977 ◽  
Vol 18 (4) ◽  
pp. 387-390 ◽  
Author(s):  
P. Ferruti ◽  
E. Martuscelli ◽  
L. Nicolais ◽  
M. Palma ◽  
F. Riva
Keyword(s):  
Mechanical Properties ◽  
Block Copolymers

scholarly journals Sulfonated Binaphthyl-Containing Poly(arylene ether ketone)s with Rigid Backbone and Excellent Film-Forming Capability for Proton Exchange Membranes

Polymers ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1287 ◽  
Author(s):  
Wenmeng Zhang ◽  
Shaoyun Chen ◽  
Dongyang Chen ◽  
Zhuoliang Ye
Keyword(s):  
Mechanical Properties ◽  
Proton Conductivity ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Thermal Stabilities ◽  
Chemical Structures ◽  
Arylene Ether ◽  
Film Forming ◽  
Ether Ketone ◽  
Microscopic Morphology

Sterically hindered (S)-1,1′-binaphthyl-2,2′-diol had been successfully copolymerized with 4,4′-sulfonyldiphenol and 4,4′-difluorobenzophenone to yield fibrous poly(arylene ether ketone)s (PAEKs) containing various amounts of binaphthyl unit, which was then selectively and efficiently sulfonated using ClSO3H to yield sulfonated poly(arylene ether ketone)s (SPAEKs) with ion exchange capacities (IECs) ranging from 1.40 to 1.89 mmol·g−1. The chemical structures of the polymers were confirmed by 2D 1H–1H COSY NMR and FT-IR. The thermal properties, water uptake, swelling ratio, proton conductivity, oxidative stability and mechanical properties of SPAEKs were investigated in detail. It was found that the conjugated but non-coplanar structure of binaphthyl unit endorsed excellent solubility and film-forming capability to SPAEKs. The SPAEK-50 with an IEC of 1.89 mmol·g−1 exhibited a proton conductivity of 102 mS·cm−1 at 30 °C, much higher than that of the state-of-the-art Nafion N212 membrane and those of many previously reported aromatic analogs, which may be attributed to the likely large intrinsic free volume of SPAEKs created by the highly twisted chain structures and the desirable microscopic morphology. Along with the remarkable water affinity, thermal stabilities and mechanical properties, the SPAEKs were demonstrated to be promising proton exchange membrane (PEM) candidates for potential membrane separations.

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