Post-irradiation grafting of tetrafluoroethylene at low temperatures. [Gamma rays]

Journal Article · Tue Sep 01 04:00:00 EDT 1981 · J. Polym. Sci., Polym. Chem. Ed.; (United States)

DOI:https://doi.org/10.1002/pol.1981.170190918· OSTI ID:6165969

Barkalov, I M; Kiryukhin, D P; Muydinov, M R

Low-temperature postirradiation grafting of tetrafluoroethylene (TFE) to polyolefines and silicone elastomers was the subject of study. After preliminary dissolution of TFE in the polymer at 273/sup 0/K the system was slowly cooled to 77/sup 0/K. In this process a certain part of TFE in polyolefines (ethylene-propylene copolymer and polypropylene) is retained by the vitreous polymer matrix. When slowly heated after radiolysis at 77/sup 0/K this system shows graft polymerization of dissolved TFE after T/sub g/. The graft copolymer is soluble and its IR spectra contain absorption bands characteristic of polytetrafluoroethylene. In polydimethylsiloxane rubber (SKT) the dissolved TFE when frozen to 77/sup 0/K remains sorbed between the SKT crystallites rather than in a separate phase. When those radiolyzed samples are heated the graft-polymerization occurs primarily over the temperature range between the TFE and SKT melting points. The technique provides for 100 to 150% grafting of TFE. This method also permits grafting to silicone rubbers and to several other polymers and elastomers.

• Research Organization: Inst. of Chemical Physics, Moscow, USSR
• OSTI ID: 6165969
• Journal Information: J. Polym. Sci., Polym. Chem. Ed.; (United States), Journal Name: J. Polym. Sci., Polym. Chem. Ed.; (United States) Vol. 19:9; ISSN JPLCA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
ABSORPTION SPECTROSCOPY
CALORIMETRY
CHEMICAL RADIATION EFFECTS
CHEMISTRY
COPOLYMERS
ELECTROMAGNETIC RADIATION
FLUORINATED ALIPHATIC HYDROCARBONS
GAMMA RADIATION
GRAFT POLYMERS
HALOGENATED ALIPHATIC HYDROCARBONS
HEATING
INFRARED SPECTRA
IONIZING RADIATIONS
LOW TEMPERATURE
MEDIUM TEMPERATURE
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC POLYMERS
POLYMERS
POLYOLEFINS
POLYPROPYLENE
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
SILICONES
SILOXANES
SPECTRA
SPECTROSCOPY