FIELD: chemistry.
SUBSTANCE: moulded fibres are subjected to heat treatment in an air medium while heating and maintaining a constant length. Content of carbon nanotubes in the fibres is 0.3-0.5%. The surface of the nanotubes contains oxygen in amount of not less than 3.5 at %. Oxidative stabilisation is carried out by raising temperature from 180°C to 230°C at a rate of 0.5°C per minute for 110-130 minutes.
EFFECT: simple technique owing to shorter process duration and improved strength properties of polyacrylonitrile fibres owing to low content of carbon nanotubes.
1 tbl, 7 ex
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RU2790823C1 |
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Authors
Dates
2014-12-10—Published
2013-05-13—Filed