Radiation-induced polymerization at high pressure of cis- and trans-1,3,3,3- tetrafluoropropene in bulk and with tetrafluoroethylene

Journal Article · Wed Aug 01 04:00:00 EDT 1973 · J. Polymer Sci., Polym. Chem. Ed., v. 11, no. 8, pp. 1973-1984

DOI:https://doi.org/10.1002/pol.1973.170110818· OSTI ID:4414282

Brown, D W; Lowry, R E; Wall, L A

The gamma -radio-induced polymerization of cis- and trans- 1,3,3,3tetrafluoropropene in bulk and with tetrafluoroethylene was studied at pressures between 5000 and l5,000 atm and temperatures between 21 and 100 deg C. At 10/sup 3/ rad/hr the homopolymerization rates range from about 10/sup -4/ to l%/hr. The activation enthalpy and volume are about 8 kcal/mole (33 kJ/mole) and --10 cm/sup 3/mole, respectively, for both isomers. The cis isomer polymerizes about twice as rapidly as the trans isomer. The latter freezes in the experimental range of temperature and pressure; the polymerization rate is very low in solid phase. Polymer intrinsic viscosities increase with polymerization pressure and decrease with polymerization temperature; the largest value obtained was 0.23 dl/g. In the copolymerizations all reactivity ratios favor incorporation of tetrafluoroethylene by factors of 6 to 16. The preference is stronger when the trans isomer is used. (auth)

• Research Organization: National Bureau of Standards, Washington, DC
• Sponsoring Organization: USDOE
• NSA Number: NSA-29-009951
• OSTI ID: 4414282
• Journal Information: J. Polymer Sci., Polym. Chem. Ed., v. 11, no. 8, pp. 1973-1984, Journal Name: J. Polymer Sci., Polym. Chem. Ed., v. 11, no. 8, pp. 1973-1984; ISSN JPLCA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ALKENES
CHEMICAL REACTION KINETICS
GAMMA RADIATION
N40300* --Chemistry--Radiation Chemistry
POLYMERIZATION
PRESSURE DEPENDENCE
RADIATION CHEMISTRY
TEMPERATURE DEPENDENCE
VERY HIGH PRESSURE FLUORINATED ALIPHATIC HYDROCARBONS