Hydrogen Bond Assisted Assembly of Well-Ordered Polyhedral Oligomeric Silsesquioxane–Block Copolymer Composites

2011 ◽  
Vol 44 (17) ◽  
pp. 6793-6799 ◽  
Author(s):  
Vikram K. Daga ◽  
Eric R. Anderson ◽  
Samuel P. Gido ◽  
James J. Watkins
Keyword(s):  
Hydrogen Bond ◽  
Block Copolymer ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Oligomeric Silsesquioxane ◽  
Copolymer Composites

Poly(styrene-b-butadiene-b-styrene)-Dye-Coupled Polyhedral Oligomeric Silsesquioxanes

2010 ◽  
Vol 123-125 ◽  
pp. 169-172
Author(s):  
Steven Spoljaric ◽  
Robert A. Shanks
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Block Copolymer ◽  
Exponential Function ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Element Model ◽  
Polyhedral Oligomeric Silsesquioxanes ◽  
Creep And Recovery ◽  
Oligomeric Silsesquioxane ◽  
Colour Coordinates

Dye-coupled polyhedral oligomeric silsesquioxane (POSS) were prepared and the coloured POSS particles were ultrasonically solution dispersed in poly(styrene-b-butadiene-b-styrene) (SBS). POSS molecules contained either isobutyl or phenyl groups to provide selective compatibility with either the soft (butadiene) or hard (styrene) phase within the block copolymer. The composition and thermal stability were characterised using thermogravimetry. Colour coordinates were measured. Tensile mechanical properties, creep and recovery were determined. Creep was modeled using the 4-element model of Maxwell and Kelvin-Voigt, while recovery correlated with the stretched-exponential function of Kohlrausch, Williams and Watts.

Hydrogen Bond-Mediated Self-Assembly of Polyhedral Oligomeric Silsesquioxane-Based Supramolecules

2010 ◽  
Vol 114 (30) ◽  
pp. 12855-12862 ◽  
Author(s):  
Ruey-Sheng Shih ◽  
Chu-Hua Lu ◽  
Shiao-Wei Kuo ◽  
Feng-Chih Chang
Keyword(s):  
Hydrogen Bond ◽  
Self Assembly ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Oligomeric Silsesquioxane

scholarly journals Interplay between Mechanical and Electrochemical Properties of Block Copolymer Electrolytes and its Effect on Stability against Lithium Metal Electrodes

2021 ◽  
Author(s):  
Vivaan Patel ◽  
Jacqueline Maslyn ◽  
Saheli Chakraborty ◽  
Gurmukh K Sethi ◽  
Irune Villalengua ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Block Copolymer ◽  
Electrochemical Properties ◽  
Current Density ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
Limiting Current ◽  
Conducting Phase ◽  
Limiting Current Density ◽  
Block Copolymer Electrolytes ◽  
Oligomeric Silsesquioxane

Abstract We have studied the cycle life of two polyhedral oligomeric silsesquioxane-b-poly(ethylene oxide)-b-polyhedral oligomeric silsesquioxane (POSS-PEO-POSS) block copolymer electrolytes differing primarily in molecular weights and composition using lithium/polymer/lithium symmetric cells. The higher molecular weight electrolyte, labeled H, has a higher storage modulus, Gel. However, the volume fraction of the conducting phase in the low molecular weight electrolyte, labeled L, is higher and this leads to a four-fold increase in limiting current density, iL. Measurement of ionic conductivity provides insight into the reason for the observed differences in limiting current density. The average lifetime of symmetric cells with electrolyte L was slightly higher than that of cells with electrolyte H. The combined effect of mechanical and electrochemical properties of electrolytes on the stability of lithium electrodeposition was quantified by examining two dimensionless parameters, i/iL and Gel/GLi, introduced in the theory developed by Barai and Srinivasan [Phys. Chem. Chem. Phys., 19, 20493–20505 (2017)]. This theory predicts the regime of stable lithium electrodeposition as a function of these two parameters. Despite large differences in Gel and iL between the two electrolytes, we show that similar cell lifetimes are consistent with the theoretical predictions of unstable lithium electrodeposition without resorting to any adjustable parameters.

Functional groups on POSS nanoparticles influence the self-assembled structures of diblock copolymer composites

RSC Advances ◽  
2014 ◽  
Vol 4 (66) ◽  
pp. 34849-34859 ◽  
Author(s):  
Yi-Syuan Lu ◽  
Shiao-Wei Kuo
Keyword(s):  
Functional Groups ◽  
Diblock Copolymer ◽  
Polyhedral Oligomeric Silsesquioxane ◽  
The Self ◽  
Self Assembled ◽  
Oligomeric Silsesquioxane ◽  
Copolymer Composites

The influence of the functional groups presented by polyhedral oligomeric silsesquioxane (POSS) nanoparticles (NPs) on the self-assembled structures formed by diblock copolymer composites were detail discussed.

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