耐辐照1E级热缩管辐照交联剂量的研究

Study on Radiation Crosslinking Dose of Radiation-resistant 1E Heat Shrinkable Tube

为了满足材料在核电站使用场合的要求,1E级热缩管需具有阻燃、耐热老化、耐辐照老化等特点;但在生产过程中,1E级热缩套管仍需要经过辐照交联这一工序才能使产品具有形状记忆功能,由于其材料本身具有耐辐照的特性,所以为了保证1E级热缩管在辐照过程中达到最优辐照剂量,本文探索了不同辐照剂量对1E级热缩管性能的影响,通过对拉伸强度、断裂伸长率、热老化性能、热延伸以及扩张投入产出比的探究,确定了最佳辐照剂量为20-24Mrad。

In order to meet the requirements of materials used in nuclear power plants,Class 1E heat shrinkable tubes should have the characteristics of flame retardancy,heat aging resistance and radiation aging resistance.However,in the production process,the 1E heat shrinkable tube still needs to undergo the process of irradiation crosslinking to make the product have the shape memory function.Because the material has the characteristics of radiation resistance,in order to ensure the 1E heat shrinkable tube to reach the optimal irradiation dose in the irradiation process,this paper explores the influence of different irradiation doses on the performance of 1E heat shrinkable tube,and determines the optimal irradiation dose to be 20-24Mrad by studying the tensile strength,elongation at break,thermal aging performance,thermal extension and expansion input-output ratio.