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METHOD OF THERMO-RADIATIONAL TREATMENT OF POLYTETRAFLUORETHYLENE (PTFE) AND COMPOSED MATERIALS ON PTFE BASED
METHOD OF THERMO-RADIATIONAL TREATMENT OF POLYTETRAFLUORETHYLENE (PTFE) AND COMPOSED MATERIALS ON PTFE BASED
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机译：基于PTFE的聚四氟乙烯（PTFE）及其复合材料的热辐射处理方法。
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摘要
This is a discovery in radiational-chemical technology area of producingpolymers withenhanced mechanical characteristics. The discovery is the thermo-radiationaltreatmentof PolyTetraFluorEthylene (PTFE) and composed materials on its' base(including nano-composedmaterials) wherein the blank PTFE are irradiated by gamma-quantum (.gamma.-quantum)under certain temperature in melting condition in an inert gas environment.The temperature of blank PTFE should be a bit higher (but no more than 20 0 C)than PTFEmelting point temperature. Wherein the closer blank PTFE temperature to PTFEmeltingpoint temperature the faster modification is.Liner impulse accelerator of electrons working in gamma mode or Isotope 60Co(Co60)can be a source of y-quantum for irradiation till absorption doze of 50-350kGrey (5-35MRad).Due to the fact that during irradiation the malting point temperature of blankPTFE is reducing the temperature of blank PTFE can be also reduced on 0.5 0-1,5 0 C pereach 10 kGrey of absorbed irradiation. By doing that the requiredcharacteristics ofmodified PTFE can be achieved faster. The required characteristics of modifiedPTFE canalso be achieved without reducing its' temperature. In this case theirradiation will take alonger timeframe.As a result of irradiation, the modified PTFE's molecular structure(morphology) is changedon micro- and nano-level. The net result is a stronger and more versatilepolymer(modified PTFE) that has improved wear resistance and viscosity under staticpressure;becoming 2 ¨ 4 dimensions better than ordinary PTFE. In addition to that themodifiedPTFE can resist radiation up to 100 MRad. All other characteristics ofordinary PTFE arestays with a limited improvement (on 5%-15% better). The method allows tomanage thecharacteristics of modified PTFE to achieve the required mechanicalcharacteristics likeelasticity vs. hardness, melting point temperature and vitrificationtemperature changesand etc.The new material could be utilized in a much broader application than ordinaryPTFE andextend the useful life of ordinary PTFE application by several times. Themodified PTFE hasa proven application in the following areas:.cndot. Isolated laying in oil & gas pipes;.cndot. Seat Seals in Valves;.cndot. Soft components of compressors and etc.;
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