Irradiation of polyisoprene in solution. [Effects of dose rate, time, and oxygen;. gamma. radiation]

Journal Article · Sat Nov 01 04:00:00 EST 1975 · Dokl. Phys. Chem. (Engl. Transl.); (United States)

OSTI ID:7349401

Novikov, S V; Sobolev, V S; Evstratov, V F

Sedimentation studies of ..gamma..-irradiated dilute solutions of polyisoprene are reported. Irradiation with small doses led to a sharp change in the fractional composition of polyisoprene, and the sedimentation curve acquired a pronounced bimodal nature with complete separation of the peaks. At very low dose rates (0.05 Mrad), a peak that moved at high speed had already appeared. With increasing dose rate, the area of peak increases and becomes commensurate with the area of the basic peak. At doses >5 Mrad, precipitation is observed. In dilute hexane, ..gamma.. irradiation led to the formation of two fractions that sediment at different rates due to the formation of associates of macromolecules. The effects of time of irradiation and oxygen on sedimentation are reported also. (BLM)

• Research Organization: Scientific-Research Inst. of the Tire Industry, Moscow
• OSTI ID: 7349401
• Journal Information: Dokl. Phys. Chem. (Engl. Transl.); (United States), Journal Name: Dokl. Phys. Chem. (Engl. Transl.); (United States) Vol. 225:1-3; ISSN DKPCA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
CROSS-LINKING
CRYOGENIC FLUIDS
ELASTOMERS
ELECTROMAGNETIC RADIATION
ELEMENTS
FLUIDS
GAMMA RADIATION
IONIZING RADIATIONS
NONMETALS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXYGEN
POLYISOPRENE
POLYMERIZATION
POLYMERS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
SEDIMENTATION