Postpolymerization of gamma-irradiated formaldehyde at 20 to 150$sup 0$K

Journal Article · Sat Jul 21 04:00:00 EDT 1973 · Dokl. Akad. Nauk SSSR, v. 211, no. 3, pp. 632-635

OSTI ID:4424870

Kiryukhin, D P; Kaplan, A M; Barkalov, I M; Gol'danskii, V I

A calorimetric method suitable for use at liquid helium temperatures was used for low-temperature studies of post-irradiation polymerization of formaldehyde. Chain polymerization of formaldehyde was demonstrated at 15-20 deg K. The rate of heat release increased with tcmperature, then decreased, again increased to the melting point of formaldehyde, and then dropped to zero. The temperatures of the first rise and fall depended on the radiation dose. The effect of optical bleaching differed in the two fields, polymerization being more effectively depressed in the first field. The course of postpolymerization at low temperatures (20-7O deg K) apparently is governed by the presence of stabillzed ions. At higher temperatures, the process is governed by radical formation. (TTT)

• Research Organization: Inst. of Chemical Physics, Moscow
• NSA Number: NSA-29-000197
• OSTI ID: 4424870
• Journal Information: Dokl. Akad. Nauk SSSR, v. 211, no. 3, pp. 632-635, Journal Name: Dokl. Akad. Nauk SSSR, v. 211, no. 3, pp. 632-635; ISSN DANKA
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

*FORMALDEHYDE-- CHEMICAL RADIATION EFFECTS
BLEACHING
CHEMICAL REACTION KINETICS
GAMMA RADIATION
LOW TEMPERATURE
N40300* --Chemistry--Radiation Chemistry
PHOTON BEAMS
POLYMERIZATION
VERY LOW TEMPERATURE