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Radiation-induced polymerization of 3,3,4,4,5,5,5-heptafluoropentene-1 at high pressure

✍ Scribed by Brown, Daniel W. ;Lowry, Robert E. ;Wall, Leo A.

Publisher
Wiley (John Wiley & Sons)
Year
1970
Tongue
English
Weight
507 KB
Volume
8
Category
Article
ISSN
0449-296X

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✦ Synopsis

Abstract

A study was made of the radiation‐induced polymerization under pressure of 3,3,4,4,5,5,5‐heptafluoropentene‐1. Polymerization rates increase with pressure (activation volume equals − 11 cc/mole) and temperature (activation enthalpy equals 6.5 kcal/mole) in liquid phase. At 13800 atm and 25°C, freezing occurs; the polymerization rate in the solid is very small. In liquid phase polymerization can continue for many hours after the irradiation is terminated. An active species is formed by radiation which initiates polymerization in the dark period.

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