Monomer sequence distributions in four-component polyesters as determined by carbon-13 and hydrogen-1 NMR

1981 ◽  
Vol 14 (6) ◽  
pp. 1764-1770 ◽  
Author(s):  
G. A. Russell ◽  
P. M. Henrichs ◽  
J. M. Hewitt ◽  
H. R. Grashof ◽  
M. A. Sandhu
1970 ◽  
Vol 43 (5) ◽  
pp. 1138-1153 ◽  
Author(s):  
V. D. Mochel ◽  
B. L. Johnson

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.


2007 ◽  
Vol 19 (19) ◽  
pp. 2877-2883 ◽  
Author(s):  
J. J. Semler ◽  
Y. K. Jhon ◽  
A. Tonelli ◽  
M. Beevers ◽  
R. Krishnamoorti ◽  
...  

1982 ◽  
Vol 15 (5) ◽  
pp. 1402-1406 ◽  
Author(s):  
Eric T. Hsieh ◽  
James C. Randall

Author(s):  
Abraham Herzog-Arbeitman ◽  
Jeffrey Ting ◽  
Siqi Meng ◽  
Hao Wu ◽  
Matthew Tirrell

<div> <div> <div> <p>Charge-driven complexation of polyelectrolytes in water is a fundamental phase separation phenomenon that is prevalent in nature and across the high-value technology landscape. Here we describe an experimentally convenient and versatile approach to construct patterned PECs, comprising well-defined charged macromolecules with both ionic styrene and neutral maleimide units alternating in the chain sequence. </p> </div> </div> </div>


2014 ◽  
Vol 48 (1) ◽  
pp. 58-63 ◽  
Author(s):  
Yavuz Caydamli ◽  
Yi Ding ◽  
Abhay Joijode ◽  
Shanshan Li ◽  
Jialong Shen ◽  
...  

1994 ◽  
Vol 195 (7) ◽  
pp. 2457-2467 ◽  
Author(s):  
Begoña Peña ◽  
Juan A. Delgado ◽  
Ernesto Pérez ◽  
Antonio Bello

2009 ◽  
Vol 30 (18) ◽  
pp. 1543-1548 ◽  
Author(s):  
Junwon Han ◽  
Byung Ho Jeon ◽  
Chang Y. Ryu ◽  
James J. Semler ◽  
Young K. Jhon ◽  
...  

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