硫化剂对聚硫代醚密封剂耐热性能的影响

摘要

分别以二氧化锰、环氧树脂、异氰酸酯为硫化剂制备聚硫代醚密封剂,通过不同条件下热空气老化后力学性能的变化和热失重分析,研究了硫化剂对聚硫代醚密封剂耐热性的影响.结果表明,用二氧化锰为硫化剂的聚硫代醚密封剂耐热性最好.%Manganese dioxide,epoxy resin and isocyanate were used as vulcanizing agents to prepare the polythioether sealants.The effect of vulcanizing agents on the heat-resistance of the sealants was investigated through the change of mechanical properties after air heat ageing under different conditions and the thermogravimetric analysis (TGA).The results indicated that the polythioether sealant cured hy manganese dioxide had the best heat-resistance for all the three vulcanizing agents.