推进剂用热塑性聚氨酯弹性体的合成及表征

推进技术 ›› 2004, Vol. 25 ›› Issue (3): 271-273.

推进剂用热塑性聚氨酯弹性体的合成及表征

何吉宇,谭惠民

北京理工大学材料科学与工程学院北京100081;北京理工大学材料科学与工程学院北京100081

发布日期:2021-08-15

Synthesis and characterization of thermoplastic polyurethane elastomer for propellants

Coll. of Material Science and Engineering,Beijing Inst.of Technology,Beijing 100081,China;Coll. of Material Science and Engineering,Beijing Inst.of Technology,Beijing 100081,China

Published:2021-08-15

摘要/Abstract

摘要： 以聚己二酸乙二醇酯(PEA)、环氧乙烷四氢呋喃无规共聚醚(PET),异佛尔酮二异氰酸酯(IPDI)及1,4 丁二醇(BDO)为原料;采用熔融二步法合成了一种能为硝酸酯增塑并满足推进剂使用要求的醚酯共聚型热塑性聚氨酯弹性体(TPUE)。采用凝胶渗透色谱(GPC),傅里叶变换红外光谱FTIR,力学性能测试和硝化甘油吸收实验等对TPUE进行表征。结果表明,制备的TPUE具有较高的相对分子质量(Mn>50000)和聚氨酯的结构特征,软段具有较低的玻璃化转变温度,以及具有与硝酸酯良好的相容性,具有满足推进剂使用要求的力学性能。

关键词: 聚氨脂推进剂;热塑性;弹性体

Abstract: Nitroester plastisized thermoplastic Ether/Ester polyurethane elastomer suitable for thermoplastic propellant binders were prepared basing on polyethylene adipate,ethylene oxide/tetrahydrofuran random copolyether,isophorone diisocyanate and 1,4- butanediol. Melt-prepolymerization method was adopted to synthesize thermoplastic polyurethane elastomer with different fraction of hard segments. GPC,FTIR,tensile test techniques and the miscibility with nitrate ester were applied to make further characterization of the TPUE.It shows that the TPUE has a higher molecular weight((Mn)>50000)with polyurethane characterization and exhibits excellent integrate properties to meet requirements of lower T_g of soft segments and good miscibility with nitrate ester and mechanical properties.

Key words: Polyurethane propellant;Thermoplasticity;Elastomer

何吉宇,谭惠民. 推进剂用热塑性聚氨酯弹性体的合成及表征[J]. 推进技术, 2004, 25(3): 271-273.