Determination of the normalized surface height autocorrelation function of a two-dimensional randomly rough dielectric surface by the inversion of light scattering data in p-polarization

2016 ◽  
Author(s):  
J. B. Kryvi ◽  
I. Simonsen ◽  
A. A. Maradudin
Keyword(s):  
Light Scattering ◽  
Autocorrelation Function ◽  
Dielectric Surface ◽  
Scattering Data ◽  
Two Dimensional

The effect of heterogeneity in composition on the determination of molecular weight distribution of block copolymers by gel permeation chromatography

1969 ◽  
Vol 22 (3) ◽  
pp. 543 ◽  
Author(s):  
JR Urwin ◽  
DN Cramond
Keyword(s):  
Molecular Weight ◽  
Light Scattering ◽  
Block Copolymers ◽  
Molecular Weight Distribution ◽  
Weight Distribution ◽  
Gel Permeation Chromatography ◽  
Scattering Data ◽  
Gel Permeation

The molecular weight of samples of block copolymers of poly(isoprene : styrene) determined by gel permeation chromatography (g.p.c.) are found to deviate from the values obtained by light scattering and osmometry. The extent of the deviation depends on composition, and comparision of (g.p.c.) values with osmometry (MN) can be interpreted if account is taken of the effect of heterogeneity. The drift in composition with molecular weight calculated from light scattering data can be used to predict the direction of the deviation, at least qualitatively.

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