Differential thermogravimetric analysis of the products of radiation-chemical telomerization of tetrafluoroethylene in acetone |
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| Authors: | I P Kim D P Kiryukhin A M Kolesnikova V G Kuryavyi V M Bouznik |
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| Institution: | (1) Institute of Problems of Chemical Physics, Russian Academy of Sciences, pr. Akademika Semenova 1, Chernogolovka, Moscow oblast, 142432, Russia;(2) Institute of Chemistry, Far East Division, Russian Academy of Sciences, pr. Stoletiya Vladivostoka 159, Vladivostok, 690022, Russia;(3) Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, Moscow, 119991, Russia |
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| Abstract: | Differential thermogravimetric (DTG) curves of the products of radiation-chemical telomerization of tetrafluoroethylene solutions in acetone with concentrations (c) of 0.06 to 2.0 mol/l were measured in the temperature range 20–600°C. The pattern of the DTG curves was determined by evaporation of telomers at c < 0.2 mol/l and their thermal degradation at c > 0.2 mol/l. Acetone-soluble telomers with an average chain length of less than 5 units prevail at c < 0.1 mol/l, whereas telomers with a chain length up to 15 units, which form colloid particles, dominate at higher c values. It was shown by means of atomic-force microscopy that such colloid solutions form coatings composed of submicron-sized particles. |
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