Radiation-induced polymerization of hexafluoropropylene at high temperature and pressure

The radiation‐induced polymerization of hexafluoropropylene was studied in the pressure and temperature ranges of 4,500–15,000 atm. and 100–230°C., respectively. Retardation was a serious problem; data thought to apply to the unretarded polymerization are summarized below. At 1,500 rad/hr. the polym...

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Published in:Journal of polymer science. Part A-1, Polymer chemistry Polymer chemistry, 1966-09, Vol.4 (9), p.2229-2240
Main Authors: Lowry, R. E., Brown, D. W., Wall, L. A.
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Language:English
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description The radiation‐induced polymerization of hexafluoropropylene was studied in the pressure and temperature ranges of 4,500–15,000 atm. and 100–230°C., respectively. Retardation was a serious problem; data thought to apply to the unretarded polymerization are summarized below. At 1,500 rad/hr. the polymerization rate was 15%/hr. at 230°C. and 15,000 atm. The activation enthalpy and volume are 9.5 kcal./mole and −10 cc./mole, respectively. The rate varies as the square root of the radiation intensity. The largest intrinsic viscosity of the polymer is 2.0 dl./g.; values increase with temperature and pressure. At 130°C. and 10,000 atm. the intrinsic viscosity was the same at two radiation intensities.
doi_str_mv 10.1002/pol.1966.150040917
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title Radiation-induced polymerization of hexafluoropropylene at high temperature and pressure
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