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以聚3–叠氮甲基–3–甲基氧杂环丁烷(PAMMO)为软段,2,4–甲苯二异氰酸酯和1,4–丁二醇为硬段,1,2–二氯乙烷为溶剂,采用溶液聚合一步法合成了含叠氮基热塑性弹性体(ATPE)。通过IR、GPC、DSC、力学性能测试等手段对ATPE的结构和性能进行了表征。结果表明:所合成的ATPE具有典型的叠氮聚醚聚氨酯特征;当R值为0.98,硬段质量分数为40%~45%时,聚合物的力学性能较优;ATPE的数均相对分子质量为50 000左右,玻璃化转变温度为–21.26℃,分解峰温为260.2℃。
Poly-3-azidomethyl-3-methyloxetane (PAMMO) was used as the soft segment and 2,4-tolylene diisocyanate and 1,4-butanediol were hard segments. Ethane as solvent, one-step synthesis of azide-based thermoplastic elastomer (ATPE) by solution polymerization. The structures and properties of ATPE were characterized by means of IR, GPC, DSC and mechanical properties test. The results show that the synthesized ATPE has the typical characteristics of azido polyether polyurethane. When the R value is 0.98 and the hard segment mass fraction is 40% -45%, the mechanical properties of the polymer are better. The number average molecular weight About 50 000, the glass transition temperature of -21.26 ℃, decomposition peak temperature of 260.2 ℃.