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，开展了无损检测中光纤在线监测定量评价的研究。开始，将用作耐腐蚀FRP的基体树脂的结晶型不饱和聚酯树脂浸渍在氢氧化钠水溶液中，观察到变色层的形成并在内部进行，然后将腐蚀澄清为腐蚀层形成类型。结果表明，变色层与碱的渗透层和水解反应层一致，即腐蚀层。接下来，尝试了具有检测化学结构变化功能的智能材料的制造。作为监测这种腐蚀劣化的方法，通过将芯部区域暴露的光纤嵌入UP树脂中，测量波长特性的变化。 关于我们 尝试用红外分光光度计（FT-IR）检测光在光纤中通过时的反射率。在第一年，使用该在线监测系统对固化前的纯树脂进行FT-IR分析。发现通过树脂的水解检测降解的可能性，因为在树脂中观察到表明酯键水解的IR峰的变化，在其中加入氢氧化钠水溶液。检查了在各种条件下对其中嵌入光纤的固化树脂的监测。虽然很容易获得透射光量的变化，但作为该结果，波长特性的变化被认为是轻微的，因为最终充分穿透红外区域的光的硫属化物纤维也溶解。然后，在可能发生硝化的硝酸溶液中进行相同的实验。通过红外光谱变化结果的比较，发现了降解反应的差异。通过这种智能材料，实现了化学结构的健康监测。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