CAJ | 학술논문

研究了200℃热空气老化时间对氟硅橡胶性能与结构的影响。结果表明，氟硅橡胶在200℃热空气老化22天后仍保持一定的力学性能；其玻璃化转变温度（ Tg ）及损耗因子峰值（ tanδmax ）随老化时间的延长下降；氟硅橡胶的储能模量（ E′）和损耗模量（ E″）在温度高于-50℃时的变化幅度较小。老化后的氟硅橡胶在红外谱图上没观察到明显的结构变化；拉伸断面的SEM图显示老化后形貌越来越粗糙，断层厚度增大，填料聚集体数量及体积增大。
연구료200℃열공기노화시간대불규상효성능여결구적영향。결과표명，불규상효재200℃열공기노화22천후잉보지일정적역학성능；기파리화전변온도（ Tg ）급손모인자봉치（ tanδmax ）수노화시간적연장하강；불규상효적저능모량（ E′）화손모모량（ E″）재온도고우-50℃시적변화폭도교소。노화후적불규상효재홍외보도상몰관찰도명현적결구변화；랍신단면적SEM도현시노화후형모월래월조조，단층후도증대，전료취집체수량급체적증대。
The effect of 200℃hot air aging time on the structure and properties of fluorinated silicon rub-ber was discussed .Result indicates that the fluorinated silicon rubber maintained good mechanical property af -ter heat aging for 22 days under 200℃.The maximum dissipation factor and the glass-transition temperature of the fluorinated silicone rubber decreased with the increase of aging time .The storage modulus and loss modu-lus almost remained the same after heating for 22 days, which makes the rubber achieve a fast-elastic recovery of the deformation with temperature.Meanwhile, tts glass transition temperature (Tg) and loss factor peak ( tanδmax ) decreased with the extended aging time .Furthermore, the storage modulus and loss modulus of fluorinated silicone rubber changed little when the temperature higher than -50℃.FTIR results suggested that the aged rubber showed no significant structure change .SEM of the tensile broken profile showed the ap-pearance became more and more rough , the thickness of the fault increased and the filler aggregate increased in number and volume .