发明名称 |
METHOD FOR PREPARING CARBON FIBER |
摘要 |
FIELD: chemical technology. ^ SUBSTANCE: invention relates to technology for preparing carbon fibers. Method involves thermal treatment of thermostabilized fiber consisting of homo- or copolymers of acrylonitrile at heating to 1200-2400°C and removing pyrolysis products by countercurrent of inert gas. In zone with maximal temperature the gas rate flow is increased by 4-7 times, i. e. from 18 to 72-126 m/min. Time for thermal treatment of fiber in this zone is 10-20% of the total thermal treatment time. The sodium content is decreased from 0.3% in the parent acrylonitrile fiber to 0-0.02% in carbon fiber after thermal treatment. The onset combustion temperature of carbon fiber is increased from 450°C to 480-660°C in case for constant inert gas feeding, and increasing the content of sodium from 0.1% in the parent acrylonitrile fiber to 0.14% in carbon fiber. ^ EFFECT: improved preparing method. ^ 1 tbl, 10 ex |
申请公布号 |
RU1840615(C) |
申请公布日期 |
2007.08.27 |
申请号 |
SU19813027991 |
申请日期 |
1981.10.19 |
申请人 |
Научно-производственное объединение "Химволокно" |
发明人 |
BONDARENKO VLADIMIR MIKHAJLOVICH;SHIBAEVA GALINA ANDREEVNA;AZAROVA MAJJA TIMOFEEVNA;NAZAROVA VALENTINA ALEKSANDROVNA;BUDYLINA ELENA GRIGOR'EVNA |
分类号 |
D01F9/22 |
主分类号 |
D01F9/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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