以自制的端羟基氟硅共聚物为基础聚合物， ZnO为填料，二月桂酸二丁基锡为催化剂，分别采用正硅酸乙酯、甲基三丁酮肟基硅烷（ D31）、甲基三乙酰氧基硅烷（ D17）为交联剂，制得脱醇型、脱酮肟型和脱醋酸型双组分室温硫化（ RTV-2）氟硅密封胶。探讨了硫化类型对氟硅密封胶表干时间、耐热空气老化性能、耐油性能、热失重性能以及动态热机械性能的影响。结果表明：脱酮肟型氟硅密封胶具有良好的综合性能：玻璃化转变温度为-114℃；热质量损失率为10％时的温度达到482.2℃；经200℃×24 h老化后，拉伸强度降低4％，拉断伸长率降低7％。%The dealcoholic , ketonic oxime and acetate RTV-2 fluorosilicone sealants were prepared by self-made hydroxyl-terminated fluorosilicone copolymer as the polymer matrix , ZnO as the filler , dibutyltin di-laurate as the catalyst , ethyl orthosilicate , trimethylbutylketoneoximesilane ( D31) and triacetoxylmethylsilane ( D17 ) as the crosslinking agents , respectively .The effect of the different vulcanization reagents on the tack free time, the thermal aging properties in air , oil resistance performance , thermogravimetric performance and dynamic thermomechanical properties of fluorosilicone sealants was discussed .Results showed that the ketonic oxime fluorosilicone sealant had better physical and thermal properties with a glass transition temperature of-114℃, a temperature of 10%weight loss at 482.2℃, and a decrease of tensile strength and elongation at break of 4%and 7%, respectively after aging for 24 hours at 200 ℃.
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