Tetrafluoroethylene telomerization initiated by benzoyl peroxide
| Autor: | Svetlana I. Kuzina, D. P. Kiryukhin, A. I. Bol’shakov |
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| Rok vydání: | 2017 |
| Předmět: |
Molar mass
Radical 02 engineering and technology Benzoyl peroxide 010402 general chemistry 021001 nanoscience & nanotechnology Chain termination 01 natural sciences 0104 chemical sciences chemistry.chemical_compound chemistry Telomerization Polymer chemistry medicine Acetone Tetrafluoroethylene Physical and Theoretical Chemistry 0210 nano-technology medicine.drug Dichloromethane |
| Zdroj: | Russian Journal of Physical Chemistry A. 91:482-489 |
| ISSN: | 1531-863X 0036-0244 |
| Popis: | The radical telomerization of tetrafluoroethylene initiated by benzoyl peroxide (BP) photolysis at λ ≥ 365 nm is studied in acetone, dichloromethane, carbon tetrachloride, and Freon 114B2 at 25°C. The products of synthesis are a mixture of telomers of different molar masses, segregated into soluble and insoluble fractions. To characterize the radicals initiating telomerization, crystalline BP and its solution in ethanol are subjected to low-temperature (77 K) photolysis, with the liquid system serving as a model for BP behavior in solutions of telogens. It is established that radicals are not only initiators but also participate in chain termination reactions, lowering the telomers’ molar mass and thus raising the proportion of the soluble fraction. Telomerization initiated by an initiator compound versus initiation by gamma radiation are compared and discussed. |
| Databáze: | OpenAIRE |
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