聚合物光纤辐照特性的实验研究(英文)

Experimental Research on Polymer Optical Fiber Under Irradiation1

分析了聚合物受辐照后发生物理化学变化的机理 ,实验研究了聚苯乙烯 (PS)、聚碳酸脂 (PC)、聚甲级丙烯酸甲脂 (PMMA)三种聚合物光纤在不同辐照剂量下光传输性能的变化以及其恢复特性 在各种辐照剂量下 ,光透过率有不同程度的下降 ,经过一段时间后也有不同程度的回复 ,并且恢复主要发生在停止辐照后的较短时间内 在 10 2 Gy以下 ,辐照造成的光损伤经过一段时间基本可以恢复 ,在更高剂量的辐照下 (超过 5 10 3Gy) ,辐照对光纤造成了永久损伤 ,经过很长时间也只能恢复一部分 实验结果表明 ,PS光纤的抗辐照特性最好 。

The physical and chemical characteristics changes of polymer under irradiation environment were analyzed. The radiation damage and recovery property for Polystyrene (PS) optical fiber, polycarbonate (PC) optical fiber, and polymethylmethacrylate (PMMA) optical fiber under γ-ray irradiation were researched experimentally. Under different irradiation dose, the light transmission rate reduced by different ratio, and the irradiation damage of fibers could recover by different extent after stopping irradiating, moreover, the recovery happened mainly during the shorter time after irradiation. Under low dose irradiation 10 2 Gy, the transmission rate reduced a little, and the irradiation damage can recover during a short time. When the irradiation dose reached 10 3 Gy, the recovery process need longer time. When the irradiation dose exceeded 5×10 3 Gy, the transmission rate reduced obviously, and the recovery process is slow and the irradiation damage can′t recover completely, that indicated fiber suffered lasting damage. By comparing experimental results of PS, PMMA, and PC opitcal fiber, It is discovered that the anti-irradiation performance of the PS optical fiber is better than that of both PMMA and PC optical fiber.