Reptation Dynamics of Asymmetric Diblock Copolymer Melts via the Dynamic Random Phase Approximation

2003 ◽  
Vol 36 (13) ◽  
pp. 5013-5019 ◽  
Author(s):  
S. G. J. Mochrie
Keyword(s):  
Diblock Copolymer ◽  
Random Phase Approximation ◽  
Random Phase ◽  
Phase Approximation ◽  
Copolymer Melts

The structure factor of a wormlike chain and the random-phase-approximation solution for the spinodal line of a diblock copolymer melt

Soft Matter ◽  
2014 ◽  
Vol 10 (29) ◽  
pp. 5405 ◽  
Author(s):  
Xinghua Zhang ◽  
Ying Jiang ◽  
Bing Miao ◽  
Yunlin Chen ◽  
Dadong Yan ◽  
...  
Keyword(s):  
Diblock Copolymer ◽  
Structure Factor ◽  
Random Phase Approximation ◽  
Random Phase ◽  
Phase Approximation ◽  
Approximation Solution ◽  
Wormlike Chain ◽  
Spinodal Line

Interpretation of Preferential Adsorption Using Random Phase Approximation Theory

1995 ◽  
Vol 60 (10) ◽  
pp. 1641-1652 ◽  
Author(s):  
Henri C. Benoît ◽  
Claude Strazielle
Keyword(s):  
Approximation Theory ◽  
Random Phase Approximation ◽  
Virial Coefficient ◽  
Random Phase ◽  
Second Virial Coefficient ◽  
Solvent Mixture ◽  
Gyration Radius ◽  
Thermodynamic Quantities ◽  
Phase Approximation ◽  
Preferential Adsorption

It has been shown that in light scattering experiments with polymers replacement of a solvent by a solvent mixture causes problems due to preferential adsorption of one of the solvents. The present paper extends this theory to be applicable to any angle of observation and any concentration by using the random phase approximation theory proposed by de Gennes. The corresponding formulas provide expressions for molecular weight, gyration radius, and the second virial coefficient, which enables measurements of these quantities provided enough information on molecular and thermodynamic quantities is available.

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