摘要
为了提高芳氧基聚磷腈包覆层的力学性能,以六氯环三磷腈、苯酚、4-羟基苯甲醛和2-烯丙基苯酚为原料合成出4种含醛基/烯丙基交联型芳氧基聚磷腈(PDPP),通过红外光谱和凝胶渗透色谱对其结构进行了表征。将所得PDPP经复配、硫化,制备出自由装填推进剂用芳氧基聚磷腈包覆层,分析了包覆层胶料的硫化特性,并通过静态拉伸试验及动态机械热分析研究了包覆层胶料在高温(+50℃)、低温(-40℃)和常温(+20℃)下的力学性能。结果表明,随着芳氧基聚磷腈包覆层中醛基/烯丙基摩尔比的减小,包覆层的玻璃化转变温度由-7.55℃逐渐提高至-3.85℃,拉伸强度(+20℃)由6.19 MPa升至6.92 MPa,延伸率(+20℃)由165.35%降至90.95%;随着包覆层体系中醛基/烯丙基摩尔比的减小,胶料的正硫化时间(t 90)由401.3 s缩短至208.4 s,最低转矩(M L)和最高转矩(M H)分别由0.069 N·m和1.451 N·m升高至0.373 N·m和2.093 N·m。
To improve the mechanical properties of aryloxypolyphosphazene-based inhibitor,four aldehyde/allyl-aryloxypolyphosphazenes(PDPP)were synthesized using hexachlorocyclotriphosphzene,phenol,4-hydroxybenzaldehyde and 2-allylphenol as the starting materials.The polymers were characterized by FT-IR and gel permeation chromatography.The aryloxypolyphazene-based inhibition formulas for inserting charge of solid propellant were prepared via compounding and vulcanization.The vulcanization characteristics were analyzed,and their mechanical properties at+50℃,-40℃and+20℃were determined via the static strain test and dynamic mechanical thermal analyses.The results show that,with decreasing the molar ratio of aldehyde to allyl,the glass transition temperature and the tensile strength(+20℃)of the inhibitor increase from-7.55℃to-3.85℃and from 6.19 MPa to 6.92 MPa,respectively,whereas the elongation(+20℃)decreases from 165.35%to 90.95%.The optimum cure time(t 90)decreases from 401.3s to 208.4s with decreasing the aldehyde-to-allyl molar ratio,whereas the minimum torque(M L)and maximum torque(M H)increase from 0.069 N·m to 0.373 N·m and from 1.451 N·m to 2.093 N·m,respectively.
作者
曹继平
肖啸
魏乐
赵凤起
杨士山
CAO Ji-ping;XIAO Xiao;WEI Le;ZHAO Feng-qi;YANG Shi-shan(Xi′an Modern Chemistry Research Institute,Xi′an 710065,China;Science and Technology on Combustion and Explosion Laboratory,Xi′an Modern Chemistry Research Institute,Xi′an 710065,China)
出处
《火炸药学报》
EI
CAS
CSCD
北大核心
2019年第5期504-510,I0005,共8页
Chinese Journal of Explosives & Propellants
基金
陆军装备部预研项目(No.301110402)
关键词
材料科学
自由装填式推进剂装药
芳氧基聚磷腈
包覆材料
硫化特性
material science
inserting charge of solid propellant
aryloxypolyphosphazene
inhibition material
vulcanization characteristics
作者简介
曹继平(1970-),男,研究员,从事固体推进剂装药绝热包覆技术研究。E-mail:cjp20434@163.com;通信作者:杨士山(1977-),男,研究员,从事固体推进剂装药绝热包覆技术研究。E-mail:358240234@qq.com。
