Tuning the Morphology of All-Polymer OPVs through Altering Polymer–Solvent Interactions

2014 ◽  
Vol 26 (17) ◽  
pp. 5020-5027 ◽  
Author(s):  
Eleni Pavlopoulou ◽  
Chang Su Kim ◽  
Stephanie S. Lee ◽  
Zhihua Chen ◽  
Antonio Facchetti ◽  
...  
Keyword(s):  
Solvent Interactions ◽  
Polymer Solvent

scholarly journals Substrate-independent three-dimensional polymer nanosheets induced by solution casting

2021 ◽  
Author(s):  
Cheol Hun Park ◽  
Eun Min Go ◽  
Kyung Min Lee ◽  
Chang Soo Lee ◽  
Sang Kyu Kwak ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Simple Solution ◽  
Solution Casting ◽  
Solvent Interactions ◽  
Comb Copolymer ◽  
Substrate Independent ◽  
Polymer Solvent

Unprecedented substrate-independent polymeric 3D nanosheets were induced via simple solution casting using PEGBEM–POEM comb copolymer. A possible mechanism is the change in the polymer–solvent interactions on the surface.

Surface and kinetic effects in gas chromatographic studies of polystyrene

1976 ◽  
Vol 54 (22) ◽  
pp. 3496-3507 ◽  
Author(s):  
Gregory J. Courval ◽  
Derek G. Gray
Keyword(s):  
Sample Size ◽  
Flow Rate ◽  
Retention Volume ◽  
Rate Dependence ◽  
Retention Data ◽  
Scanning Electron Micrographs ◽  
Linear Absorption ◽  
Solvent Interactions ◽  
Non Linear ◽  
Polymer Solvent

Considerable variation in the measurement of polymer–solvent interactions using gc retention data may occur due to kinetic factors, surface excess concentrations of probe vapour, and non-linear partition isotherms. The kinetic factors, which appear as a flow rate dependence of the retention volume, are analysed in terms of a previously reported theoretical model for retention on polymeric stationary phases passing through the glass transition. The predicted linear extrapolations to zero flow rate are obtained for the retention of n-tetradecane on polystyrene. The variation of this flow rate dependence with temperature and with the thickness of the stationary phase are also in qualitative agreement with the theory. A simplified model for the effect of loading on the retention diagram is presented. Non-linear absorption and bulk sorption isotherms result in a dependence of retention volume on sample size, necessitating an extrapolation of the measured retention volumes to zero peak height. The temperature variation of the flow rate dependence, the effect of loading, and the effect of sample size on retention volume are all further complicated by uneven distribution of polymer on support. From scanning electron micrographs of the beads it is evident that 'beading up' of the polystyrene on the glass surface may occur at low loadings, resulting in a non-uniform coating with large areas of the beads uncoated. It is concluded that in order to obtain reliable data on polymer–solvent interactions using gas chromatography, all of the above-mentioned factors must be considered.

Evanescent-Wave Cavity Ring-Down Investigation of Polymer/Solvent Interactions

2005 ◽  
Vol 109 (15) ◽  
pp. 7435-7442 ◽  
Author(s):  
Theresa E. Hannon ◽  
Soonwoo Chah ◽  
Richard N. Zare
Keyword(s):  
Evanescent Wave ◽  
Solvent Interactions ◽  
Polymer Solvent ◽  
Cavity Ring Down

Strong polymer molecular weight-dependent material interactions: impact on the formation of the polymer/fullerene bulk heterojunction morphology

2017 ◽  
Vol 5 (25) ◽  
pp. 13176-13188 ◽  
Author(s):  
Joo-Hyun Kim ◽  
Abay Gadisa ◽  
Charley Schaefer ◽  
Huifeng Yao ◽  
Bhoj R. Gautam ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Phase Separation ◽  
Molecular Mobility ◽  
Bulk Heterojunction ◽  
Morphological Evolution ◽  
Domain Size ◽  
S Phase ◽  
Polymer Molecular Weight ◽  
Solvent Interactions ◽  
Polymer Solvent

The morphological evolution is initiated by L–L or L–S phase separation (left) and further developed by molecular mobility, governed by polymer–solvent interactions which determine the final domain size of the BHJ layer (right).

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