羟胺改性对聚丙烯腈预氧化纤维低温碳化的影响  

Effect of Hydroxylamine Hydrochloride on Pre-oxidized Polyacrylonitrile Fibers in Low-Temperature Carbonization

作　　者：于法涛[1,2] 王浩静[1] 李宝峰[1,2] 

机构地区：[1]中国科学院山西煤炭化学研究所碳材料重点实验室,山西太原030001 [2]中国科学院研究生院,北京100039

出　　处：《合成纤维》2008年第10期8-10,14,共4页Synthetic Fiber in China

摘　　要：分别将未经过与经过盐酸羟胺处理的预氧化纤维在氮气(99.999%)气氛下,以5℃/min的升温速率加热至800℃进行低温碳化。通过定量傅里叶变换红外光谱、差示扫描量热分析、热失重分析等手段研究了羟胺改性对预氧化纤维在低温碳化过程中的影响。结果表明:羟胺改性可以使原来环化不完全的预氧化纤维在较低温度下进一步环化,从而提高了其热稳定性和碳化收率,所得碳纤维的性能也得到了较大幅度的提高。Two kinds of pre-oxidized polyacrylonitrile fibers, treated and untreated by hydroxylamine hydrochloride, were heated to 800 ℃ at the rate of 5℃/min in N2 atmosphere. The effect of hydroxylamine hydrochloride on pre-oxidized polyacrylonitrile fibers during low-temperature carbonization was characterized by FT-IR, DSC, TG. The results demonstrated that with hydroxylamine hydrochloride modification, the cyclize degree of pre-oxidized polyacrylonitrile fibers at a relative low temperature was increased, the thermal stability and C yield were both improved and the performence of carbon fibers was also improved.

关 键 词：聚丙烯腈 碳化 预氧化纤维 碳纤维 盐酸羟胺 

分 类 号：TQ342.742[化学工程—化纤工业]