Polymer electrolyte complexes of LiCIO4 and comb polymers of siloxane with oligo-oxyethylene side chains

1988 ◽  
Vol 20 (3) ◽  
pp. 281-288 ◽  
Author(s):  
Daryle Fish ◽  
Ishrat M. Khan ◽  
E. Wu ◽  
Johannes Smid
Keyword(s):  
Polymer Electrolyte ◽  
Side Chains ◽  
Comb Polymers

scholarly journals Morphological effect of side chain on H3O+ transfer inside polymer electrolyte membranes across polymeric chain via molecular dynamics simulation

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
JinHyeok Cha
Keyword(s):  
Fuel Cell ◽  
Ionic Conductivity ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Membrane ◽  
Dynamics Simulation ◽  
Polymeric Chain ◽  
Side Chains ◽  
Dynamic Simulations ◽  
Morphological Effect ◽  
Electrolyte Membrane

AbstractPerformance and durability of polymer electrolyte membrane are critical to fuel cell quality. As fuel cell vehicles become increasingly popular, membrane fundamentals must be understood in detail. Here, this study used molecular dynamic simulations to explore the morphological effects of perfluorosulfonic acid (PFSA)-based membranes on ionic conductivity. In particular, I developed an intuitive quantitative approach focusing principally on hydronium adsorbing to, and desorbing from, negatively charged sulfonate groups, while conventional ionic conductivity calculations featured the use of mean square displacements that included natural atomic vibrations. The results revealed that shorter side-chains caused more hydroniums to enter the conductive state, associated with higher ion conductivity. In addition, the hydronium path tracking showed that shorter side-chains allowed hydroniums to move among host groups, facilitating chain adsorption, in agreement with a mechanism suggested in earlier studies.

Synthesis and properties of comb polymers with semirigid mesogen-jacketed polymers as side chains

2011 ◽  
Vol 50 (5) ◽  
pp. 918-926 ◽  
Author(s):  
Ziyue Ma ◽  
Cui Zheng ◽  
Zhihao Shen ◽  
Dehai Liang ◽  
Xinghe Fan
Keyword(s):  
Side Chains ◽  
Comb Polymers

scholarly journals Amphiphilic Comb Polymers as New Additives in Bicontinuous Microemulsions

Nanomaterials ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 2410
Author(s):  
Debasish Saha ◽  
Karthik R. Peddireddy ◽  
Jürgen Allgaier ◽  
Wei Zhang ◽  
Simona Maccarrone ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Amphiphilic Polymers ◽  
Side Chain ◽  
Side Chains ◽  
Contrast Variation ◽  
Dna Complexes ◽  
Comb Polymers ◽  
Polymer Architectures

It has been shown that the thermodynamics of bicontinuous microemulsions can be tailored via the addition of various different amphiphilic polymers. In this manuscript, we now focus on comb-type polymers consisting of hydrophobic backbones and hydrophilic side chains. The distinct philicity of the backbone and side chains leads to a well-defined segregation into the oil and water domains respectively, as confirmed by contrast variation small-angle neutron scattering experiments. This polymer–microemulsion structure leads to well-described conformational entropies of the polymer fragments (backbone and side chains) that exert pressure on the membrane, which influences the thermodynamics of the overall microemulsion. In the context of the different polymer architectures that have been studied by our group with regards to their phase diagrams and small-angle neutron scattering, the microemulsion thermodynamics of comb polymers can be described in terms of a superposition of the backbone and side chain fragments. The denser or longer the side chain, the stronger the grafting and the more visible the brush effect of the side chains becomes. Possible applications of the comb polymers as switchable additives are discussed. Finally, a balanced philicity of polymers also motivates transmembrane migration in biological systems of the polymers themselves or of polymer–DNA complexes.

Brushes and lamellar mesophases of comb-shaped (co)polymers: a self-consistent field theory

2020 ◽  
Vol 22 (40) ◽  
pp. 23385-23398
Author(s):  
Ivan V. Mikhailov ◽  
Ekaterina B. Zhulina ◽  
Oleg V. Borisov
Keyword(s):  
Field Theory ◽  
Main Chain ◽  
Side Chains ◽  
Comb Polymers ◽  
Grafting Density ◽  
Consistent Field ◽  
Self Consistent ◽  
Self Consistent Field ◽  
Self Consistent Field Theory

Superimposed distributions of main chain ends in brush of comb polymers with different length and grafting density of side chains.

Polymer electrolyte membranes based on poly(phenylene ether)s with sulfonic acid via long alkyl side chains

2013 ◽  
Vol 1 (37) ◽  
pp. 11389 ◽  
Author(s):  
Xuan Zhang ◽  
Li Sheng ◽  
Teruaki Hayakawa ◽  
Mitsuru Ueda ◽  
Tomoya Higashihara
Keyword(s):  
Polymer Electrolyte ◽  
Sulfonic Acid ◽  
Polymer Electrolyte Membranes ◽  
Side Chains ◽  
Alkyl Side Chains ◽  
Electrolyte Membranes
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