Influence of Regulator, Temperature and Monomer Proportion on the Microstructure and Sequence Distribution of Random Isoprene-Styrene Copolymer

2006 ◽  
Vol 11-12 ◽  
pp. 367-370
Author(s):  
Hua Dong Feng ◽  
Yu Xia Qi ◽  
Ming Yao ◽  
Xing Ying Zhang
Keyword(s):  
1H Nmr ◽  
Solution Polymerization ◽  
Sequence Distribution ◽  
Styrene Copolymer

The linear random isoprene-styrene copolymer (L-SIR) was prepared by solution polymerization with cyclohexane—n-hexane mixture as solvent and n-BuLi as initiator in the presence of the polar regulator—tetrahydrofuran (THF). Microstructures of L-SIR have been studied by 1H-NMR.

1H NMR and 13C NMR investigations of sequence distribution and tacticity in poly(vinyl alcohol-co-vinyl levulinate)

Polymer ◽  
2006 ◽  
Vol 47 (22) ◽  
pp. 7827-7834 ◽  
Author(s):  
Yanmei Wang ◽  
Hirokuni Ono ◽  
Atsushi Ikeda ◽  
Naruhito Hori ◽  
Akio Takemura ◽  
...  
Keyword(s):  
1H Nmr ◽  
13C Nmr ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Sequence Distribution

Sequence Distribution of 1,4-Polybutadienes

1978 ◽  
Vol 51 (2) ◽  
pp. 168-179 ◽  
Author(s):  
Yasuyuki Tanaka ◽  
Hisaya Sato ◽  
Koichi Hatada ◽  
Yoshio Teeawaki ◽  
Hiroshi Okuda
Keyword(s):  
1H Nmr ◽  
13C Nmr ◽  
Sequence Distribution ◽  
Peak Assignment ◽  
Infrared Method ◽  
Sequence Distributions ◽  
Nmr Methods ◽  
In Cis

Abstract The spin-decoupled 1H NMR and 13C NMR methods were employed for the determination of the cis-trans sequence distribution in polybutadiene. Poly(butadiene-2,3-d2) and cis-trans isomerized polybutadienes were used for the peak assignment and the resonance of methylene protons in cis-trans linkage could be described as an A1B2 system. The dyad and triad sequence distributions of cis-1,4 and trans-1,4 units were determined for isomerized, equibinary, and lithium catalyzed polybutadienes, and polycyclooctadienes. The accuracy of the measurements was also studied comparing the results with those by infrared method.

The conformational properties of calix[4]arenes 1h NMR and molecular mechanics calculations

1989 ◽  
Vol 86 ◽  
pp. 945-954 ◽  
Author(s):  
F. Bayard ◽  
D. Decoret ◽  
D. Pattou ◽  
J. Royer ◽  
A. Satrallah ◽  
...  
Keyword(s):  
Molecular Mechanics ◽  
1H Nmr ◽  
Molecular Mechanics Calculations ◽  
Conformational Properties

1H-NMR study of Mott insulator κ -(ET)2Cu2(CN)3with isotropic triangular lattice

2004 ◽  
Vol 114 ◽  
pp. 377-378 ◽  
Author(s):  
Y. Shimizu ◽  
K. Miyagawa ◽  
K. Oda ◽  
K. Kanoda ◽  
M. Maesato ◽  
...  
Keyword(s):  
1H Nmr ◽  
Triangular Lattice ◽  
Mott Insulator ◽  
Nmr Study
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