嵌段型含氟中性聚合物键合剂的合成及应用
Synthesis and application of block type fluorine-containing neutral polymeric bonding agent
董亚希 1白国强 1李晓峰 1王丽丽 1陈洛亮1
作者信息
- 1. 黎明化工研究设计院有限责任公司,河南洛阳 471000
- 折叠
摘要
以丙烯腈、甲基丙烯酸甲酯、丙烯酸羟乙酯、甲基丙烯酸六氟丁酯为聚合单体,偶氮二异丁腈(AIBN)为引发剂,2-(2-氰基丙基)二硫代苯甲酸酯(CPDB)为链转移剂,通过控制加料顺序,采用可逆加成-断裂链转移(RAFT)活性自由基聚合工艺,一锅法制备了一种嵌段型含氟中性聚合物键合剂(LBA-311键合剂).用核磁共振氢谱(1H-NMR)、高效液相色谱(HPLC)、元素分析、凝胶渗透色谱(GPC)对所合成的中间产物及产品进行了结构表征与分析.结果表明,所合成的嵌段型含氟中性聚合物键合剂分子量和分子结构可控.与硝胺填料奥克托今(HMX)的界面作用研究表明LBA-311键合剂与HMX之间具有较好的浸润性和黏结强度.初步应用研究表明,LBA-311键合剂应用于叠氮高能固体推进剂配方中,使推进剂药柱常温拉伸强度和最大延伸率分别提高了 51.9％和57.3％,具有较好的应用前景.
Abstract
Using acrylonitrile,methyl methacrylate,hydroxyethyl acrylate,and hexafluorobutyl methacrylate as the polymerization monomers,azodiisobutyronitrile(AIBN)as the initiator,and 2-(2-cyanopropyl)dithiobenzoate(CPDB)as the chain transfer agent,a block type fluorine-containing neutral polymeric bonding agent(LBA-311 bonding agent)was prepared by one-pot method through controlling the feeding sequence and using the reversible addition-fragmentation chain transfer(RAFT)active radical polymerization process.The structural characterization and analysis of the synthesized intermediates and products were carried out by nuclear magnetic resonance hydrogen spectrum(1H-NMR),high performance liquid chromatography(HPLC),elemental analysis and gel permeation chromatography(GPC).The results showed that the molecular weight and molecular structure of the synthesized block type fluorine-containing neutral polymeric bonding agent were controllable.Interfacial interaction studies with the nitramine filler octogen(HMX)showed that there was good wettability and bonding strength between LBA-311 bonding agent and HMX.Preliminary application studies showed that LBA-311 bonding agent applied in azide high energy solid propellant formulation increased the ambient temperature tensile strength and maximum elongation of propellant grains by 51.9％and 57.3％,respectively,which has good application prospects.
关键词
叠氮推进剂/中性聚合物键合剂/RAFT聚合/界面作用/力学性能Key words
azide propellant/neutral polymeric bonding agent/RAFT polymerization/interfacial interaction/mechanical performance引用本文复制引用
出版年
2024
NETL
NSTL
万方数据