METHOD FOR THERMORADIATION TREATMENT OF POLYTETRAFLUOROETHYLENE PRODUCTS

FIELD: polymer materials. SUBSTANCE: method consists in gamma-irradiation of product at elevated temperature in melt in inert medium. Melt is first cooled and irradiation is carried out until dose 5-35 Mrad is absorbed, while temperature of product is reduced during irradiation procedure by 0.8- 1 C...

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Bibliographic Details
Main Authors SOBOLEV G.P, BRUK M.A, IVANCHENKO V.K, SICHKAR' V.P, KHATIPOV S.A, VORONINA E.N
Format Patent
LanguageEnglish
Published 27.08.2003
Edition7
Subjects
AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G
CHEMISTRY
COMPOSITIONS BASED THEREON
GENERAL PROCESSES OF COMPOUNDING
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
WORKING-UP
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Summary:FIELD: polymer materials. SUBSTANCE: method consists in gamma-irradiation of product at elevated temperature in melt in inert medium. Melt is first cooled and irradiation is carried out until dose 5-35 Mrad is absorbed, while temperature of product is reduced during irradiation procedure by 0.8- 1 C per 1 Mrad so that temperature of product is maintained below melting temperature of polytetrafluoroethylene but above crystallization temperature. EFFECT: decreased creeping and increased wear resistance of products at the same coefficient of fiction characteristic of polytetrafluoroethylene non-modified by radiation. 2 cl, 1 dwg, 1 tbl, 5 ex
Bibliography:Application Number: RU20010104473