关键词: 聚醚聚氨酯~+;稳定剂;热氧降解~+;差热分析;热失重分析

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

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