Silicon-29 NMR studies of polymethylhydrosiloxanes: Spin-lattice relaxation time (T1) measurements |
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| Authors: | Yi-Ming Pai William P. Weber Kenneth L. Servis |
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| Affiliation: | Department of Chemistry and Loker Hydrocarbon Research Institute, University of Southern California, Los Angeles, California 90089-1062 U.S.A.;Department of Chemistry and Loker Hydrocarbon Research Institute, University Park, Los Angeles, California 90089-1062 U.S.A. |
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| Abstract: | 29Si NMR spectra of polymethylhydrosiloxanes, Me3SiO[MeHSiO]nSiMe3 from n = 3 to 8 and 35, have been determined. Both chemical shifts and spin-lattice relaxation times (T1) have been measured. The stereochemistry at the adjacent chiral MeHSiO unit influences the nearest neighbor 29Si chemical shift. The effect of chain length and position of MeHSiO units on T1 values for Me3SiO[MeHSiO]nSiMe3 systems are discussed. |
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