Application of SAS to Bulk Amorphous Polymers, Block Copolymers and Polymer Blends

1986 ◽  
Vol 79 ◽  
Author(s):  
R. J. Roe
Keyword(s):  
Block Copolymer ◽  
Block Copolymers ◽  
Polymer Blends ◽  
Approximation Theory ◽  
Random Phase Approximation ◽  
Random Phase ◽  
Amorphous Polymers ◽  
Phase Approximation ◽  
Block Copolymer Micelles ◽  
Copolymer Structure

AbstractThis article discusses the application of small-angle neutron and X-ray scattering techniques to the study of bulk amorphous polymers, block copolymers and polymer blends. The subject matter discussed include density fluctuation in single component amorphous polymers, concentration fluctuation in compatible polymer blends and its interpretation in terms of the random phase approximation theory, analysis of the scattering from incompatible polymer blends as developed by Porod, determination of the phase boundary thickness, order-disorder transition in block copolymer, interpretation of the scattering from disordered block copolymer systems by means of the random phase approximation theory, characterization of ordered block copolymer structure, and the study of block copolymer micelles.

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.

Application of random phase approximation to the dynamics of polymer blends and copolymers

Polymer ◽  
1986 ◽  
Vol 27 (12) ◽  
pp. 1935-1942 ◽  
Author(s):  
A.Ziya Akcasu ◽  
M. Benmouna ◽  
H. Benoit
Keyword(s):  
Polymer Blends ◽  
Random Phase Approximation ◽  
Random Phase ◽  
Phase Approximation

A random phase approximation theory of nuclear relaxation in CuO2planes

1990 ◽  
Vol 67 (9) ◽  
pp. 5079-5081 ◽  
Author(s):  
N. Bulut ◽  
D. W. Hone ◽  
D. J. Scalapino ◽  
N. E. Bickers
Keyword(s):  
Approximation Theory ◽  
Random Phase Approximation ◽  
Random Phase ◽  
Nuclear Relaxation ◽  
Phase Approximation
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