氨化改性AN-IA共聚物的表征及对制备碳纤维的影响

摘要

对丙烯腈-衣康酸共聚物进行氨化改性,对氨化处理后的丙烯腈-衣康酸共聚物进行表征,研究氨化改性对最终制备碳纤维性能的影响.结果表明,衣康酸胺配比的增加使AN-IA共聚物的红外谱图发生一定变化,在1730和1700cm-1处出现中等宽峰,并且峰强增大.经过氨化处理后的AN-IA共聚物,所制备的预氧化纤维氧含量超过11％,预氧化能力明显提高,最终碳化处理制备的碳纤维强度可达到3.76GPa.%The AN-IA copolymer was modified by ammoniation and the structure of AN-IA copolymer afier modification was characterized, the effect of ammoniation modification on the final performance of carbon fiber was studied. The results showed the infrared spectrum was changed with the ratio of IA increasing in some way, the moderate broad peaks appeared at 1730 and 1700cm-1 and the intensity of peaks increased. The oxy-gen content of preoxided fiber which prepared by ammoniation modified AN-IA copolymer was over 11%, the pre-oxidization ability significantly improved, and the intensity of carbon fiber after final carbonization can reach 3. 76GPa.