Viscosity-Molecular Weight Correlations of Disiloxanols by29Si Fourier Transform Nuclear Magnetic Resonance

1976 ◽  
Vol 9 (1) ◽  
pp. 85-88 ◽  
Author(s):  
R. W. LaRochelle ◽  
J. D. Cargioli ◽  
E. A. Williams
Keyword(s):  
Molecular Weight ◽  
Nuclear Magnetic Resonance ◽  
Fourier Transform ◽  
Magnetic Resonance ◽  
Nuclear Magnetic

Study of Configurational Sequence Structures of Poly(Butadiene)s by Carbon-13 Proton Decoupled Fourier Transform Nuclear Magnetic Resonance Spectroscopy

1973 ◽  
Vol 46 (2) ◽  
pp. 350-358 ◽  
Author(s):  
Yasuhide Alaki ◽  
Toshio Yoshimoto ◽  
Mamoru Imanari ◽  
Makoto Takeuchi
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Fourier Transform ◽  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Polymer Chains ◽  
Proton Nuclear Magnetic Resonance ◽  
Resonance Spectroscopy ◽  
Sequence Structure ◽  
Nmr Method ◽  
Nuclear Magnetic

Abstract Carbon-13 proton nuclear magnetic resonance (NMR) of poly(butadiene) s consisting of various ratios of cis-1,4-, trans-1,4- and 1,2-structures were measured by the pulsed Fourier transform NMR method. The spectra of poly(butadiene)s with two or three kinds of butadiene configurations show several new signals which were not observed for homopolymers comprising merely one kind of butadiene configuration. All of these peaks are ascribed to the carbons linked by different kinds of configurations. From these results, the configurational sequence structure of butadiene units in polymer chains has been revealed.

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