连续水相沉淀聚合中聚丙烯腈颗粒形态的影响因素Influencing Factors of Polyacrylonitrile Particle Structure in the Continuous Aqueous Depositional Polymerization
李鹏,宋文迪,张捷
LI Peng,SONG Wen-di,ZHANG Jie
摘要(Abstract)：
研究了中试规模的连续搅拌釜内丙烯腈/丙烯酸甲酯/衣康酸(AN/MA/IA)三元水相沉淀聚合，考察了共聚序列结构、共聚单体用量、引发剂用量和反应pH值对聚丙烯腈颗粒形态的影响。研究发现：共聚物序列结构改善、均匀性变好，可以提高颗粒稳定性，减小颗粒粒径及分布指数，增加颗粒密实度，降低沉降值；适当增加共聚物IA组分、提高引发剂用量、提高pH值，可以提高共聚物的颗粒稳定性，改善颗粒形态。
The ternary aqueous precipitation polymerization of acrylonitrile/methyl acrylate/itaconic acid(AN/MA/IA) in a continuous stirring reactor of middle scale was studied, and the effects of copolymerization sequence structure, polymeric monomer dosage, initiator dosage and reaction pH value on particle morphology of polyacrylonitrile were investigated. The researches reveal that the improvement of sequence structure and uniformity of copolymer can improve the particle stability, reduce the particle size and distribution index, increase the particle density and decrease the sedimentation value; the stability and morphology of copolymer particles can be improved by appropriately increasing the copolymer IA component, initiator dosage and pH value.
关键词(KeyWords)：
连续水相沉淀聚合;聚丙烯腈;颗粒形态
continuous aqueous precipitation polymerization;polyacrylonitrile;particle morphology
基金项目(Foundation):
作者(Author):
李鹏,宋文迪,张捷
LI Peng,SONG Wen-di,ZHANG Jie
DOI: 10.16090/j.cnki.hcxw.2023.04.017
参考文献(References)：
- [1]陈焕锦.丙烯腈水相沉淀共聚合产物结构调控的研究[D].杭州:浙江大学, 2012.
- [2]吴林波,曹堃,李宝芳,等.高单体进料浓度下丙烯腈连续水相沉淀共聚的研究Ⅰ转化率和分子量及其分布[J].化学反应工程与工艺,1999(4):364-372.
- [3]吴林波,李宝芳,曹堃,等.高单体进料浓度下丙烯腈连续水相沉淀共聚的研究Ⅱ聚合物颗粒形态[J].化学反应工程与工艺, 1999(4):373-381.
- [4]唐施华,袁惠根. AN水相沉淀聚合颗粒形态和聚合机理[J].合成纤维工业, 1987(1):12-16.
- [5]赵亚奇,王成国,朱波,等.丙烯腈水相沉淀聚合引发机理的研究[J].材料工程, 2008(3):77-80.
- [6]任国强,史子瑾,童克锦.聚丙烯腈的颗粒特性[J].合成纤维,1988, 17(2):41-46.
- [7]任国强,史子瑾,童克锦.混合对丙烯腈连续水相沉淀共聚的影响——Ⅱ丙烯腈共聚物的颗粒形态[J].合成树脂及塑料, 1993(2):13-18.