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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| Main Authors | , , , , , |
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| Format | Patent |
| Language | English |
| Published |
27.08.2003
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| Edition | 7 |
| Subjects | |
| Online Access | Get full text |
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| Abstract | 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 |
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| AbstractList | 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 |
| Author | IVANCHENKO V.K SICHKAR' V.P SOBOLEV G.P VORONINA E.N KHATIPOV S.A BRUK M.A |
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| Snippet | FIELD: polymer materials. SUBSTANCE: method consists in gamma-irradiation of product at elevated temperature in melt in inert medium. Melt is first cooled and... |
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| SubjectTerms | 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 |
| Title | METHOD FOR THERMORADIATION TREATMENT OF POLYTETRAFLUOROETHYLENE PRODUCTS |
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