scholarly journals Infrared Analysis of Copolymers. II. The Sequence Distribution of Methyl Acrylate Units in Methyl Acrylate–Styrene Copolymers

1973 ◽  
Vol 46 (2) ◽  
pp. 634-635 ◽  
Author(s):  
Naobumi \={O}i ◽  
Koichi Moriguchi ◽  
Hiro-o Shimada ◽  
Fusako Hashimoto
Keyword(s):  
Methyl Acrylate ◽  
Infrared Analysis ◽  
Sequence Distribution ◽  
Styrene Copolymers

Monomer Sequence Distribution in Butadiene Styrene Copolymers

1970 ◽  
Vol 43 (5) ◽  
pp. 1138-1153 ◽  
Author(s):  
V. D. Mochel ◽  
B. L. Johnson
Keyword(s):  
Aromatic Proton ◽  
Analog Computer ◽  
Curve Analysis ◽  
Nmr Spectrum ◽  
Sequence Distribution ◽  
Monomer Sequence ◽  
Styrene Copolymers ◽  
Overlapped Peaks ◽  
Sequence Distributions ◽  
Butadiene Styrene

Abstract A method is described for determining styrene sequence distribution in butadiene-styrene copolymers. An analog computer is used to resolve overlapped peaks in the styrene aromatic proton NMR spectrum. In n-BuLi copolymers a quite quantitative distinction can be made between “short” sequences, containing two and three styrene units, and “long” sequences, containing more than three units. With this method it is possible to determine experimentally the styrene-centered triad distributions and approximate styrene sequence distributions of butadiene—styrene copolymers. Agreement between calculated and NMR-curve analysis results is good, especially for n-butyllithium-catalyzed butadiene—styrene copolymers.

Sequence Distribution in 1-Chloro-1,3-butadiene: Styrene Copolymers

1973 ◽  
Vol 6 (2) ◽  
pp. 200-205 ◽  
Author(s):  
A. Winston ◽  
P. Wichacheewa
Keyword(s):  
Sequence Distribution ◽  
Styrene Copolymers ◽  
Butadiene Styrene
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