Effect of Organic-Inorganic Hybrid Nanoparticles (POSS-PEG(n = 4)) on Thermal, Mechanical, and Electrical Properties of PEO-Based Solid Polymer Electrolytes

2015 ◽  
Vol 36 (2) ◽  
pp. 145-151 ◽  
Author(s):  
Anji Reddy Polu ◽  
Hee-Woo Rhee
Keyword(s):  
Electrical Properties ◽  
Polymer Electrolytes ◽  
Solid Polymer Electrolytes ◽  
Hybrid Nanoparticles ◽  
Solid Polymer ◽  
Inorganic Hybrid ◽  
Mechanical And Electrical Properties

Polybenzimidazoles/Phosphoric Acid Solid Polymer Electrolytes: Mechanical and Electrical Properties

1998 ◽  
Vol 548 ◽  
Author(s):  
M. Litt ◽  
R. Ameri ◽  
Y. Wang ◽  
R. Savinell ◽  
J. Wainwright
Keyword(s):  
Mechanical Properties ◽  
Molecular Weight ◽  
Electrical Properties ◽  
Phosphoric Acid ◽  
Polymer Electrolytes ◽  
Solid Polymer Electrolytes ◽  
Inherent Viscosity ◽  
Solid Polymer ◽  
Elongation At Break ◽  
Mechanical And Electrical Properties

ABSTRACTPoly (2,2'-(m-phenylene) 5,5'-bibenzimidazole), PBI and poly (2,5-benzimidazole), ABPBI, were cast into films and doped with phosphoric acid. Their mechanical properties were studied as a function of inherent viscosity and phosphoric acid content. The commercial PBI with an I. V. of 0.8 to 0.9 had relatively low elongation at break. It was fractionated; the higher the inherent viscosity the higher the modulus and elongation. At low phosphoric acid doping the modulus rose because a crystalline phase developed, and then dropped as more phosphoric acid was added. A second doping method produced films with high crystallinity and higher conductivity (0.02-.03 vs. 0.06-.08 S/cm) but poorer elongation than those made by doping a cast film in phosphoric acid. In order to get higher molecular weight films that could have better mechanical properties, we decided to polymerize 3,4-diaminobenzoic acid to ABPBI, an AB polymer for which I. V.'s of∼16 have been reported. After learning how to purify and polymerize the monomer, I. V.'s of 6–8 were easily obtained. Conductivities of the doped ABPBI films were as high as those of the best PBI films. With their high viscosities, the ABPBI films were much tougher and had better elongation than the doped PBI films.

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