浇注型环氧树脂基耐高温中子屏蔽复合材料  

High Temperature Resistant Epoxy Resin-Based Composites by Casting Process for Neutron Shielding

作　　者：韩志鹏 秦冲 周金向[2] 余明 陈兆彬[2] HAN Zhi-Peng;QIN Chong;ZHOU Jin-Xiang;YU Ming;CHEN Zhao-Bin(Marine Equipment Shenyang Bureau,Changchun 130033,China;Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Polymer Composites Engineering Laboratory,Changchun 130022,China;Second Institute of Ship Design and Research of Wuhan,Wuhan 430205,China)

机构地区：[1]海装沈阳局,长春130033 [2]中国科学院长春应用化学研究所,高分子复合材料工程实验室,长春130022 [3]武汉第二船舶设计研究所,武汉430205

出　　处：《应用化学》2023年第10期1420-1429,共10页Chinese Journal of Applied Chemistry

摘　　要：提出“自驱动梯度升温”概念,研制了一种耐高温,且综合性能优异的环氧树脂基中子屏蔽复合材料。通过反应动力学研究,确定基体为混合多官能度缩水甘油胺环氧树脂和混合改性酚醛胺固化剂,基体中高反应活性树脂体系固化反应放热触发低反应活性树脂体系的固化反应,实现了室温浇注工艺条件下,高性能环氧树脂无外部热源输入即可固化成型,制备耐高温中子屏蔽材料的目的。在基体材料分子结构中刚/柔性基团的匹配、体系复杂相态下的传热和功能填料的筛选等几方面研究基础上,最终得到了玻璃化转变温度(T_(g))>150℃、负荷热变形温度>150℃、快中子屏蔽系数(^(252)Cf,40 mm)>2.5、热中子屏蔽率(^(252)Cf,40 mm)>99.98%、物理机械性能优异的中子屏蔽复合材料。该材料在服役工况苛刻的核辐射二次屏蔽领域具有现实应用场景。Based on the proposed concept of“self-driven gradient temperature rising”,the epoxy resin-based composites with high temperature resistance for neutron shielding are developed,which is realized by casting and curing at room temperature.The matrix of the composite is determined by the reaction kinetics study as a mixture of mixed multifunctional glycidylamine epoxy resins and mixed modified phenolic amine curing agents.Through comprehensive studies on the matching between rigid and flexible groups in the molecular structure of resins and curing agents,heat transfer in complex phases,and screening of functional fillers,the composites for neutron shielding with excellent physical and mechanical properties are obtained,of which the glass transition temperature(T_(g))is higher than 150℃,the load heat deformation temperature is higher than 150℃,the fast neutron shielding coefficient(^(252)Cf,40 mm)is higher than 2.5,and the thermal neutron shielding rate(^(252)Cf,40 mm)is higher than 99.9%.This kind of high temperature resistant epoxy resin-based composites shows great potentials in the field of secondary shielding of nuclear radiation under harsh service conditions in real applications.

关 键 词：室温浇注 环氧树脂 酚醛胺类固化剂 耐高温 中子屏蔽 

分 类 号：O615.5[理学—无机化学]