摘要
以1,4-丁二醇（BDO）为引发剂,三氟化硼-乙醚（BF3-Et2O）为催化剂,二氯甲烷（CH2Cl2）为溶剂,3-硝酸酯甲基-3-甲基氧杂环丁烷（NIMMO）发生阳离子开环聚合得到端羟聚3-硝酸酯甲基-3-甲基氧杂环丁烷（PNIMMO）。讨论了催化剂与引发剂的摩尔比、反应温度、单体滴加速度对聚合反应的影响,得到最佳反应条件为：催化剂与引发剂的摩尔比为0.50-0.75,反应温度为10℃左右,缓慢滴加单体。用红外光谱与核磁共振碳谱对聚合物结构进行了表征。性能测试结果表明：PNIMMO的玻璃化转变温度为-24.52℃,分解焓为＋1212J/g,分解峰温为221.78℃,与N-100固化后所得的聚氨酯胶片室温下的力学性能：δ为3.5-3.7MPa,ε为260%-280%。
Using 1,4-butanediol as initiator,boron trifluoride etherate as catalyst and CH2Cl2 as solvent, poly（3- nitratomethyl- 3- methyl oxetane） （PNIMMO） was prepared by 3 -nitratomethyl-3-methyloxetane via cationic ringopening polymerization. The effect of molar ratio for catalyst and initiator, reaction temperature and the dropping rate of monomer on polymerization was discussed. The optimum conditions were determined as： molar ratio for catalyst and initiator was 0. 50-0. 75, reaction temperature was around 10℃ and dropping monomer slowly. The polymer was characterized by IR and ^13CNMR. The results show that the glass transition temperature, the enthalpy of decomposition and the decomposition peak temperature of the polymer are -24.52℃, ＋1 212 J/g and 221.78 ℃, respectively. The mechanical properties of polyurethane film cured by N-100 are 3.5 3.7MPa for δ and 260%-280% for ε at room temperature.
出处
《火炸药学报》
EI
CAS
CSCD
2008年第5期24-27,共4页
Chinese Journal of Explosives & Propellants
