【摘要】 为改善叠氮聚醚推进剂的力学性能,拟在叠氮固化剂结构中引入极性强的氮杂环结构,通过增强分子间的作用力,来提高叠氮聚氨酯弹性体的力学性能。以氮杂环结构三元醇三羟乙基异氰尿酸酯(THEIC)为起始剂,环氧氯丙烷(ECH)为单体,按阳离子开环聚合反应制得氯化聚醚多元醇(CPP);CPP经叠氮化取代反应制备出叠氮聚醚多元醇(APP);APP与六次甲基二异氰酸酯(HDI)加成反应制得未见文献报导的叠氮固化剂(HAP)。通过对红外光谱、VPO数均相对分子质量(Mr)、羟值(OH)和异氰酸酯基含量(wNCO)等分析,对产物进行了结构鉴定与性能表征。胶片测试结果表明,在叠氮固化剂中引入强极性的氮杂环结构后,叠氮聚氨酯弹性体的力学性能有较大提高。GAP/HAP弹性体的拉伸强度和断裂伸长率分别为0.945 MPa和149.4%。引入乙二醇作扩链剂,相应弹性体的力学性能分别提高到1.438 MPa和161.16%。更多还原

【Abstract】 To improve the mechanical property of the azide polyether propellant,nitrogen heterocyclic ring was introduced to the azide curing agent to enhance the intermolecular force,which would develop the mechanical property of the azide polyurethane elastomer.At the present of initiator of trihydroxyethyl isocyanurate(THEIC),the chloride polyether polyol(CPP) was synthesized by cationic ring-opening polymerization of epichlorohydrin.CPP reacted with NaN3 to give the azide polyether polyol(APP).The azide curing agent(HAP) was prepared by the addition of APP with HDI.These products were identified by IR,Mr(VPO),hydroxyl number(OH) and NCO group content(wNCO).The test data show that the mechanical property of azide polyurethane elastomer increased much by introducing nitrogen heterocyclic ring to the azide curing agent.The tensile strength and elongation at break of GAP/HAP are 0.945 MPa and 149.4%.When adding ethylene glycol as chain extender,the tensile strength and elongation at break of the corresponding elastomer are 1.438 MPa and 161.16%.更多还原