Polymer degradation during radiation-induced emulsion polymerization of styrene. [. gamma. rays]

Journal Article · Thu Jan 01 04:00:00 EST 1976 · J. Polym. Sci.; (United States)

OSTI ID:7313014

Sato, K ^[1]; Rudin, A; Huang, R Y.M.

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1. Polysar Ltd., Sarnia, Ont.

Styrene was polymerized in emulsion with initiation by ..gamma..-rays at a dose rate of 0.6 Mrad/hr. Polymerization rates were as expected from previous reports by others. No branching or crosslinking was detectable, and the anti M/sub w//anti M/sub n/ ratio of the polystyrene did not change significantly during the course of the polymerization reaction. The molecular weight of the product polymer decreased with increasing conversion, in contrast to the behavior of chemically initiated emulsion polymerizations. Monomer-free polystyrene does not degrade under the same radiation conditions, and the progressive decrease of polymer molecular weight with conversion is shown to result from the presence of monomer.

• OSTI ID: 7313014
• Journal Information: J. Polym. Sci.; (United States), Journal Name: J. Polym. Sci.; (United States) Vol. 14; ISSN JPSCA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
AROMATICS
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
COLLOIDS
DECOMPOSITION
DISPERSIONS
ELECTROMAGNETIC RADIATION
EMULSIONS
GAMMA RADIATION
HYDROCARBONS
IONIZING RADIATIONS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLYMERIZATION
POLYMERS
POLYOLEFINS
POLYSTYRENE
POLYVINYLS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
STYRENE