| Title |
A Solid-State NMR Investigation of MQ Silicone Copolymers
|
|---|---|
| Published in |
Applied Magnetic Resonance, May 2013
|
| DOI | 10.1007/s00723-013-0456-8 |
| Pubmed ID | |
| Authors |
Sergey G. Vasil’ev, Vitaly I. Volkov, Elena A. Tatarinova, Aziz M. Muzafarov |
| Abstract |
The structure of MQ copolymers of the general chemical formula [(CH3)3SiO0.5]m [SiO2]n was characterized by means of solid-state magic angle spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy. The MQ copolymers are highly branched polycyclic compounds (densely cross-linked nanosized networks). MQ copolymers were prepared by hydrolytic polycondensation in active medium. (29)Si NMR spectra were obtained by single pulse excitation (or direct polarization, DP) and cross-polarization (CP) (29)Si{(1)H} techniques in concert with MAS. It was shown that material consist of monofunctional M (≡SiO Si (CH3)3) and two types of tetrafunctional Q units: Q(4) ((≡SiO)4 Si) and Q(3) ((≡SiO)3 SiOH). Spin-lattice relaxation times T 1 measurements of (29)Si nuclei and analysis of (29)Si{(1)H} variable contact time signal intensities allowed us to obtain quantitative data on the relative content of different sites in copolymers. These investigations indicate that MQ copolymers represent dense structure with core and shell. |
Mendeley readers
The data shown below were compiled from readership statistics for 33 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Poland | 1 | 3% |
| Unknown | 32 | 97% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 9 | 27% |
| Researcher | 7 | 21% |
| Unspecified | 3 | 9% |
| Student > Doctoral Student | 2 | 6% |
| Student > Master | 2 | 6% |
| Other | 5 | 15% |
| Unknown | 5 | 15% |
| Readers by discipline | Count | As % |
|---|---|---|
| Chemistry | 12 | 36% |
| Materials Science | 6 | 18% |
| Unspecified | 3 | 9% |
| Chemical Engineering | 2 | 6% |
| Physics and Astronomy | 1 | 3% |
| Other | 2 | 6% |
| Unknown | 7 | 21% |
Attention Score in Context
This research output has an Altmetric Attention Score of 3. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 07 November 2023.
All research outputs
#8,292,507
of 24,814,419 outputs
Outputs from Applied Magnetic Resonance
#46
of 222 outputs
Outputs of similar age
#68,123
of 199,208 outputs
Outputs of similar age from Applied Magnetic Resonance
#1
of 1 outputs
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