Deuterated propylene glycol

Hair treated with deuterated propylene glycol at 120°C... 

Silica hydrolysis-condensation of alkoxysilane-terminated chains of various polymers (PB, poly(propylene)-glycol, poly (ethylene)-glycol) leads to the formation of silica nodules. Hybrid (organic-inorganic) nanocomposite rubbery materials are obtained in this way. These materials have been swollen by various deuterated solvents, in order to probe the order induced in the polymer matrix under stress [80]. 

Fig. 6.2. (A) Gas chromatogram of deuterated ethylenes and propylenes. Stationary phase AgNO, solution in ethylene glycol temperature, 16 C [63]. (B) Gas chromatogram of deuterated ethylenes at 0°C on a column of silver nitrate-ethylene glycol solution [63]. (C) Gas chromatogram of the separation of deuterated ethylenes by circular chromatography on a column of silver nitrate-ethylene glycol solution (reprinted with permission from ref. 66). (D) Gas chromatogram of tritiated ethylenes and propylenes on a column of silver nitrate-ethylene glycol (reprinted with permission from ref. 65).

This method for the separation of deuterated olefin isomers has been used successfully by Ache and Wolf [66]. Fig. 6.2C shows the separation of ethylene (1), ethylene-d, (2) and ethylene-dj (3) by circular chromatography. The separation obtained at the ninth cycle took about 100 min. Successful separation of the deuterated olefins on columns containing a complexing stationary phase, i.e., silver nitrate solution in ethylene glycol, gave the possibility of separating isotopic olefin position isomers labelled also with tritium. Lee and Rowland [65] demonstrated the possibility of this separation. Fig. 6.2D shows the separation of ethylene (1), ethylene-t, (2) and propylenes CHj H—CH=CH2... 

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