Study on Smart Materials to Detect a Chemical Structures of Matrix Resin Using Optical Fiber Sensor.

针对耐腐蚀玻璃钢的化学降解问题，进行了光纤在线监测无损检测定量评价的研究。首先，将用作耐蚀玻璃钢基体树脂的间苯型不饱和聚酯树脂浸泡在氢氧化钠水溶液中，观察到变色层在内部形成和发展，然后将腐蚀定性为腐蚀层形成类型。证实变色层与碱的渗透层和反应水解层一致，即为腐蚀层。其次，尝试了具有检测化学结构变化功能的智能材料的研制。作为监测这种腐蚀降解的方法，通过在不饱和聚酯树脂中嵌入其中裸露芯区的光纤，波长特性的变化为…尝试用红外光谱仪(FT-IR)检测光纤中更多的TiC光。第一年，使用该在线监测系统对固化前的纯树脂进行了FT-IR分析。在加入氢氧化钠水溶液的树脂中，观察到了表明酯键水解的红外光谱峰的变化，从而发现了通过树脂的水解来检测降解的可能性。考察了光纤在不同条件下对固化树脂的监测情况。虽然透射光体积的变化很容易得到，但由于充分穿透红外区光的硫化物光纤最终也溶解了，所以波长特性的变化被轻微地识别为这一结果。然后，在硝酸溶液中进行了同样的实验，可能发生硝化反应。通过对红外光谱变化结果的比较，发现了降解反应的差异。从这种类型的智能材料，实现了对化学结构的健康监测。较少

For the chemical degradation of corrosion resistant FRP, the study was carried out for the purpose of carrying out the quantitative evaluation by monitoring on-line using optical fiber in the non-destructive inspection. To begin with, isophthalic type of unsaturated polyester resin used as a matrix resin for corrosion resistant FRP was immersed in sodium hydroxide aqueous solution, and it was observed that discoloration layer was formed and progressed in the inside, then the corrosion was clarified to the corrosive layer formation type. It was confirmed that the discoloration layer agreed with penetration layer of the alkali and the layer in which reacted the hydrolysis, that was corroded layer. Next, the manufacture of the smart material with the function of detecting the chemical structure change of was tried. As a method for monitoring such corrosion degradation, by embedding the optical fiber in which core region was exposed in the UP resin, the change of the wavelength characteris … More tic of the light which passes through in optical fiber was tried to be detected using infrared spectrophotometer (FT-IR). In the first year, the FT-IR analysis was carried out on the neat resin before curing using this on-line monitoring system. The possibility of detecting degradation by the hydrolysis of the resin was found, because the change of IR peak which showed the hydrolysis of the ester linkage was observed in the resin in which sodium hydroxide aqueous solution was added. The monitoring of the cured resin in which the optical fiber was embedded in various conditions was examined. Although the change of transmitted light volume was easily obtained, the change of wavelength characteristic was recognized slightly as this result, since also the chalcogenide fiber finally which sufficiently penetrates the light of infrared region dissolves. Then, it was conducted that same experiment under nitric acid solution which nitration might occur. From the comparison of the results of change of the IR spectrum, the difference in reaction of degradation was detected. From this type of smart materials, the health monitoring of chemical structure was achieved. Less