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

作　　者：董亚希 白国强 李晓峰 王丽丽 陈洛亮 Dong Yaxi;Bai Guoqiang;Li Xiaofeng;Wang Lii;Chen Luoiang(Liming Research&Design Institute of Chemical Industry Co.,Ltd.,Luoyang 471000,China)

机构地区：[1]黎明化工研究设计院有限责任公司,河南洛阳471000

出　　处：《化学推进剂与高分子材料》2024年第2期43-47,共5页Chemical Propellants & Polymeric Materials

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(^(1)H–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。Using acrylonitrile,methyl methacrylate,hydroxyethyl acrylate,and hexafluorobutyl methacrylate as the polymerization monomers,azodisobutyronitrile(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(^(1)H-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 

分 类 号：V512[航空宇航科学与技术—航空宇航推进理论与工程] TQ564[化学工程—炸药化工]