阻燃腈纶的制备

摘要

采用铜离子处理腈纶,再与水合肼及反应助剂组成的混合水溶液反应,制备了阻燃腈纶,探讨了处理工艺条件对纤维性能的影响.结果表明:在水合肼加入量20 mL,w(NaOH)为5％的NaOH 4.7 mL,质量分数为10％精炼剂9.4mL,甩干时间3 min,热处理温度160℃,热处理时间180 min条件下,得到的阻燃腈纶断裂强度为2.15 cN/dtex,断裂伸长率为21.4％,极限氧指数为32.83％.%A flame-retardant polyacrylonitrile (PAN) fiber was prepared from PAN fiber treated with copper ion by reacting with the blend solution of hydrazine hydrate and reaction promoters. The effects of treatment conditions on fiber properties were discussed. The results showed that the flame retardant PAN fiber can be prepared with the breaking strength of 2.15 cN/dtex, e-longation at break 21.4% and limiting oxygen index of 32. 83% under the conditions as followed: 20 mL hydrazine hydrate, 4. 7 mL 5% NaOH and 9.4 mL 10% scouring agent by mass fraction, dripping time 3 min, heat treating temperature 160 ℃ and time 180 min.