摘要
经强极性溶剂二甲基甲酰胺（ＤＭＦ）和二甲基亚砜（ＤＭＳＯ）预处理的芳香族聚酰胺纤维Ｎｏｍｅｘ（ｍ－ＰＩＡ）和Ｋｅｖｌａｒ（ｐ－ＰＴＡ），再经紫外线和低温等离子体处理后，用电子自旋共振（ＥＳＲ）研究了纤维基质中自由基强度的变化．芳香族聚酰胺纤维经紫外线和低温等离子体照射后，在纤维基质中能生成自由基；自由基强度与纤维自身性质及预处理引起的纤维形态变化有关；自由基的稳定性随温度升高而减小；在一定温度下，放置短时间后，自由基趋于稳定．
After the pretreatment with strongly-interacting solvents as dimethylformamide (DMF) and dimethyl sulfoxide (DMSO),and then with the ultraviolet radiation and low temperature plasma treatment, the relative free radical intensity within the treated m-Aramid Nomex (mPLA)and p-Aramid Kevlar(p-PTA)fibers were studied by means of electron-spin-resonance (ESR )spectroscopy.The results tell us that after ultraviolet radiotion and low temperature plasma treatment, there formed free radicals in the Aramid fibers,and the free radical intensity has close connection with the fiber itself and the structural changes of fiber caused by the pretreatment with solvents. They also tell us that with the increase of temperature,the stabilities of free radicals decreased,and at a certain temperature, the free radicals tend to become more stable after disposing for a short tims.
出处
《西北纺织工学院学报》
1995年第4期302-306,共5页
Journal of Northwest Institute of Textile Science and Technology
基金
国家教委优秀年轻教师基金
关键词
聚酰胺纤维
紫外线
等离子体
变性处理
自由基
ltraviolet
low temperature plasma
Aramid fibers
ESR
dimethylformamide
dimethyl sulfoxide
