End-groups and tacticity in polymeric silicones detected by 29Si nuclear magnetic resonance
- 1 January 1974
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Chemical Communications
- No. 14,p. 559-561
- https://doi.org/10.1039/c39740000559
Abstract
It is shown that for a polymeric silicone of average chain-length 50 units (excluding the end-stopping groups) separate 29Si {1H}resonances can be seen for the three units at each end, and tacticity effects can also be observed when asymmetric units are involved (in the case investigated the silicone is probably atactic); tacticity effects on 29Si spectra are also demonstrated for a shortchain silicone.Keywords
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