新型推进剂中聚氨酯粘合剂的稳定研究

STABILIZATION OF POLYETHER URETHANE BINDER IN SOLID PROPELLANT

关键词:  聚醚聚氨酯~+  稳定剂  热氧降解~+  差热分析  热失重分析

Key words:  Polyether urethane +  Stabilizer agent  Thermooxidation +  Differential thermal analysis  Weightlessness by heating analysis

摘要:

采用热失重分析法研究了２， ６－二叔丁基对甲基酚（ＢＨＴ）、吩噻嗪、亚磷酸三苯酯和中定剂二苯基二甲基脲等４种典型稳定剂对推进剂中ＥＯ／ＴＨＦ共聚醚及聚醚聚氨酯粘合剂的热氧稳定效果。吩噻嗪对共聚醚的热氧降解以及聚醚聚氨酯初始阶段的热氧降解具有良好的稳定作用，但在较高温度下，对聚醚聚氨酯的稳定效果急剧下降。亚磷酸三苯酯对共聚醚和聚醚聚氨酯的稳定效果均较差， 但与ＢＨＴ组合使用能获得较好的结果。中定剂对共聚醚没有稳定作用， 但对聚醚聚氨酯表现出较好的稳定效果。ＢＨＴ对共聚醚和聚醚聚氨酯均有较好的稳定效果， 尤其是与中定剂配合使用

Abstract:

The stabilization effect of four typical stabilizers (2,6 di t buty1 4 methy1 phenol (BHT),phenothiazine,tripheny1 phosphite and centralite Ⅱ) was evaluated by thermogravimetric analysis of their performance on EO/THF co polyether and polyether urethane Phenothiazine was the most efficient stabilizer for both co polyether and polyether urethane,however,a self restraining effect was observed at high temperature Tripheny1 phosphite was less effective for both co polyether and polyether urethane when it was used alone;when used in combination with other stabilizers,however,it manifested evident stabilizaiton Centralite Ⅱ showed no effect on EO/THF co polyether,but protected polyether urethane to some extent BHT resulted in good stability for both co polyether and polyether urethane,and was the best choice for use in combination with centralite Ⅱ