ARMOS纤维的紫外老化

Ultraviolet aging of ARMOS fiber

摘要: 通过氙灯辐照试验对ARMOS纤维进行了紫外老化试验，采用单丝拉伸、FTIR、SEM和XRD研究了紫外光辐照对ARMOS纤维的影响。结果表明，短时间的紫外光辐照引起ARMOS纤维的拉伸强度在辐照6h后上升了13.7%，36h后又下降了2.1%。利用FTIR、SEM和XRD发现，经过紫外光辐照后，ARMOS纤维中酰胺基团的C—N键发生了断裂，同时氢键缔合能力增强，纤维结晶度增加，从而导致纤维表面出现沟槽，断口方式由微纤劈裂转向脆性断裂，说明短时间的紫外辐照对ARMOS纤维有削弱和强化2种相互矛盾的影响作用。

Abstract: An ultraviolet aging test of ARMOS fiber was carried out with the irradiation of xenon lamp，in which the effects of ultraviolet aging on ARMOS fiber were studied by single fiber tension，FTIR，SEM and XRD. The results show that the tensile strength of ARMOS fiber increases 13.7% after UV irradiation for 6 h and decreases 2.1% after 36 h. The C—N in amide of the ARMOS fiber is broken；hydrogen bond combination ability and crystallinity increase；grooves appear on the surface of ARMOS fiber；the tensile failure mode changes from fibril splitting to brittle fracture by FTIR，SEM and XRD. It could，therefore，be concluded that short time UV irradiation can cause two contradictory effects on the ARMOS fiber.