用称重法研究聚丙烯腈树脂的凝固过程
注意:本论文已在《新型碳材料》 Vol.19, No. 1, pp. 16–20, 2004发表
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吕永根1 , 杨常玲2 , 翟磊3 , 李永红3 , 吕春祥3 , 贺福3 , 凌立成3
(1 东华大学材料科学与工程学院,上海200051; 2.东华大学化学与化工学院,上海200051;
3.中国科学院山西煤炭化学研究所炭材料重点实验室,山西太原030001)
摘要: 将聚丙烯腈二甲亚砜纺丝液在试管中于二甲亚砜水溶液中成型并凝固,通过计量凝固样品重量随时间
的变化来考察在不同凝固浴条件下的凝固速率,并观察了凝固样品的横断面形貌。结果表明:凝固样品重量的变
化可以直观地反应不同凝固浴条件下聚丙烯腈一-FO亚砜(DMs0)一水体系凝固速率的变化。随凝固浴浓度的提高,
凝固速度减小,样品横截面趋于均匀化、致密化;凝固温度从30℃升高到50℃ ,凝固速度加快,截面由非圆形变为
圆形,但在80℃下凝固速度反而下降;凝固浴中第三组份的添加降低了扩散速度,但会引起孔洞的产生。
关键词: 聚丙烯腈纤维;凝固;称重法
中图分类号: TQ 342 .3
基金项目:中国科学院创新方向性项目( KGCX2-SW-204),山西省自然科学青年科技研究基金(20021013),太原市科技启明星计划项目
作者简介:吕永根(1966-),男,山西原平人,博士,主要从事炭素材料研究。
A study of coagulation in wet—spining by a weighing method
LU Yong-gen1 , YANG Chang-1ing2, ZHAI Lei3, LI Yong-hong3, LU Chun-xiang3. HE Fu3, LING Li-cheng3
(1.College ofMaterial Sciences and Engineering, Dognhua University, Shanghai 200051, China;
2.Colege of Chemistry and Chemical Engineenng, Dognhua University, Shanghai 200051, China;
3.Key Lab of Carbon Material, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China)
Abstract: The influence of coagulation variables on diflusion during wet-spinning was investigated by measuring the
remaining weight of the samples. The transverse structure of the coagulated sam ples was also studied. It is found that
coagulation slows down with increasing dimethyl sulforide(DMSO)concentration while the transverse structure of the
coagulated sam ple becomes finer. The coagulation speed is faster and the transverse structure is finer at 50℃ than at
30℃ and 80℃. The additive makes coagulation slower,however,some voids are generated across the coagu lated
sam ples.
Key words:Polyacrylonitrile fiber; Coagulation; Mass weighting
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