模型辅助AN-HEA自由基共聚过程的调控:动力学、组成漂移及其抑制  

Model⁃assisted regulation of AN⁃HEA copolymerization process:kinetics,composition drift and prevention

作　　者：李娓 王小波 胡笑晨 郑东升 黄志萍[2] 姚俊 LI Wei;WANG Xiaobo;HU Xiaochen;ZHENG Dongsheng;HUANG Zhiping;YAO Jun(Hubei Aerospace Chemical New Material Technology Co.Ltd.,Xiangyang 441057,China;Hubei Institute of Aerospace Chemical Technology,Xiangyang 441003,China)

机构地区：[1]湖北航天化学新材料科技有限公司,襄阳441057 [2]湖北航天化学技术研究所,襄阳441003

出　　处：《固体火箭技术》2023年第6期809-816,共8页Journal of Solid Rocket Technology

基　　金：国家重点研发“大科学装置前沿研究”重点专项项目(2022YFA1604004)。

摘　　要：在以丙烯腈(AN,M_(1))和丙烯酸羟乙酯(HEA,M_(2))为单体、自由基无规共聚制备中性聚合物键合剂过程中,由于两种单体活性不同,会造成共聚前期和后期生成的共聚物中单体含量不同,即产生组成漂移现象。采用模拟的方法讨论了某一典型AN和HEA间歇共聚反应体系自由基浓度、单体转化率、单体瞬时组成、共聚物的瞬时组成和平均组成的变化。结果表明,为了抑制组成漂移现象的发生,应当采用连续滴加活性较高的HEA单体的半连续共聚工艺,并且通过模型计算可得到HEA的滴加速率。文中所研究的方法和结果将为单体组成均匀AN-HEA无规共聚物的制备提供重要参考。With acrylonitrile(AN,M_(1))and hydroxyethyl acrylate(HEA,M_(2))as monomers,in the process of preparing neutral polymer bonding agent by means of the free radical random copolymerization,monomer content of copolymer generated at the early and late stage are different due to the different reaction activity of two monomers,which can cause composition drift phenomenon.In pres-ent study,the changes of free radical concentration,monomer conversion and instantaneous composition,copolymer instantaneous composition and average composition during a typical batch copolymerization of AN and HEA were investigated by kinetics model.In order to prevent composition drift,a semi-continuous copolymerization process should be used by continuously adding the higher reac-tion activity monomer—HEA,and the dosing rate of HEA can be available by model simulation.The methods and results of this study will provide an important reference for the preparation of various AN-HEA random copolymers with uniform monomer composition.

关 键 词：中性聚合物键合剂 自由基共聚 动力学模型 组成漂移 间歇共聚 半连续共聚 

分 类 号：V512[航空宇航科学与技术—航空宇航推进理论与工程]