Zheng Yu-ying, Wang Can-yao, Fu Ming-lian, Cai Wei-long, Wang Liang-en
College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350002, China.
Guang Pu Xue Yu Guang Pu Fen Xi. 2005 Mar;25(3):402-4.
The mechanism of the modification of Kevlar fiber by polypropylene glycol(PPG) and cis-2-butene-1, 4-diol was studied in the paper, the authors learned the esterification of toluene-2, 4-diisocyanate (TDI) onto Kevlar fiber by infrared spectrum. In the mean time, the infrared spectrograms of the productions which steadily disposed by PPG and butendiol were analysed respectively, the result showed that the intensity of the bands was reinforced at about 1700-1720 cm(-1) after the samples were steadily disposed, that is to say, the group of --NCO has been stabilized into --NHCO group, the effect of steady disposal was obvious; but the disposal effect of butendiol was apparently better than PPG's at the same condition. Finally, the authors compared the influence of different mol rates between TDI and butendiol on the productions. Based onthe consequence, excessive butendiol would prevent the Kevlar fiber from farther reaction, therefore, the mol rate between TDI and butendiol should approach 1:1.
本文研究了聚丙二醇（PPG）和顺-2-丁烯-1,4-二醇对芳纶纤维的改性机理，作者通过红外光谱研究了甲苯-2,4-二异氰酸酯（TDI）与芳纶纤维的酯化反应。同时，分别分析了经PPG和丁二醇稳定处理后的产物的红外光谱图，结果表明，样品经稳定处理后，在约1700 - 1720 cm(-1)处的谱带强度增强，也就是说，-NCO基团已稳定转化为-NHCO基团，稳定处理效果明显；但在相同条件下，丁二醇的处理效果明显优于PPG。最后，作者比较了TDI与丁二醇不同摩尔比时对产物的影响。基于结果，过量的丁二醇会阻止芳纶纤维进一步反应，因此，TDI与丁二醇的摩尔比应接近1:1。
