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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6 h后上升了13.7%,36 h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.

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