聚硫密封胶与氟硅密封胶人工加速老化研究 - 南昌航空大学期刊网.PDF

46 ,, (, 330063) []; ;; [ ] (XM - 22BXM - 23) (FVMQ) XM- 22B FVMQ XM- 23, , FT- IR :; 28 d, ,XM- 22B FVMQ 2% 5%, XM- 23 3% ;, A, XM - 22BXM - 23 FVMQ 15% 23% 11%; 28d, XM- 23 [] TU57814 [] A [] 1001- 4926(2010) 02- 0046- 04 Study on A eronau tical Sea lan ts after A rtificial A ccelerated A ging ANG Yun- ying, ZHANG Jian-ming,MENG Jiang- yan (N anchang H angK ong Un iv ersity, N anchang , J iangx i 330063, Ch ina ) K ey w ord s: polysulfide sealants; fluorosilicone sealant; artificial hot- air aging; artificialxenon arc lamp aging A bstract: Artificial accelerated aging behaviors of the polysulfide sealants(XM - 22BXM - 23) and the fluorosilicone sealant (FVMQ) were studied. Artificial accelerated aging expermi entsofXM - 22B and FVMQ sampleswere carried out bymeansofhot- air, andXM- 23 sampleswere carried out bymeansof xenon arc lamp. Then theappearancesof the sampleswere analyzed, and their tensile strengthsweremeasured. Finally, the change of radicals of the sealantswas analyzed by FT- IR. The results show that the gloss of sealants little changed before and after aging. The tensile strength of aeronautical sealantswas lessobviousafter aged for28 days. The tensile strength ofXM- 22B increased by 2% afterbeing agedbyhot- air aging, FVMQ increased by 5% afterbeing aged by hot- airaging, and the tensile strength ofXM - 23 decreasedby3% afterbeing agedbyxenon lamp aging. hether it ishot- air aging orxenon lamp aging, ShoreA hardnessof aeronautical sealantswas increased. Shore A hardness of XM - 22B, XM - 23 and FVMQ increasedby 15%, 23% and 11% respectively. It is concluded thatXM - 23 hasno cleardegradation afterbeing aged for28 days. [ 2] , ,