Kinetics and mechanism of thermal polymerization of hexafluoropropylene under high pressures |
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Authors: | A A Zharov I A Guzyaeva |
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Institution: | 1.N. D. Zelinsky Institute of Organic Chemistry,Russian Academy of Sciences,Moscow,Russian Federation |
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Abstract: | The basic kinetic parameters of thermal polymerization of hexafluoropropylene, namely, general rate constants, degree of polymerization,
and their temperature and pressure dependences in the range of 230–290 °C and 2–12 kbar (200–1200 MPa) were determined. The
activation energy (E
act = 132±4 kJ mol−1) and activation volume (ΔV
0
≠ = −27±1 cm3 mol−1) were calculated. The activation energy of thermal initiation of polymerization was estimated. The reaction scheme based
on the assumption about a biradical mechanism of polymerization initiation was proposed. |
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Keywords: | |
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