Radiation-induced bulk polymerization of vinyl chloride under centrifugation. [Gamma radiation]

Journal Article · Sun Jul 01 04:00:00 EDT 1979 · J. Polym. Sci., Polym. Chem. Ed.; (United States)

DOI:https://doi.org/10.1002/pol.1979.170170717· OSTI ID:6062708

Carenza, M; Tavan, M; Palma, G

Radiation-induced bulk polymerization of vinyl chloride has been carried out under centrifugation at 21/sup 0/C. The polymerization rate and the molecular weight of the polymer produced were found to remain constant in the low-conversion region and to be equal to the corresponding values that were obtained by extrapolation at zero conversion in normal polymerization. This was at variance with the case of normal polymerization in which both quantities exhibit a continuous increase from the start of the polymerization. Such an increase is to be associated with the presence of large agglomerates, formed through flocculation of initially originated particles, in the liquid monomer phase during the polymerization under quiescent conditions. For the constancy of the kinetic parameters in the polymerization under centrifugation it should be assumed that in the system there remain dispersed only particles not yet flocculated. 1 figure, 1 table.

• Research Organization: CNR, Bologna, Italy
• OSTI ID: 6062708
• Journal Information: J. Polym. Sci., Polym. Chem. Ed.; (United States), Journal Name: J. Polym. Sci., Polym. Chem. Ed.; (United States) Vol. 17:7; ISSN JPLCA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360406 -- Materials-- Polymers & Plastics-- Radiation Effects-- (-1987)
38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
CENTRIFUGATION
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
ELECTROMAGNETIC RADIATION
GAMMA RADIATION
IONIZING RADIATIONS
MEDIUM TEMPERATURE
MONOMERS
POLYMERIZATION
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
SEPARATION PROCESSES
VINYL MONOMERS