功能性聚脲弹性体的制备及γ射线辐照对其性能的影响  

Preparation of functional polyurea elastomer and effect ofγ-ray irradiation on its performance

作　　者：李君雅 郭辉[1] 何川 李可天 何潘庆 姜欣怡 Li Junya;Guo Hui;He Chuan;Li Ketian;He Panqing;Jiang Xinyi(Southwest University of Science and Technology,Mianyang 621000;Nuclear Power Institute of China,Chengdu 610005)

机构地区：[1]西南科技大学,绵阳621000 [2]中国核动力研究设计院,成都610005

出　　处：《化工新型材料》2021年第12期93-97,102,共6页New Chemical Materials

基　　金：国家自然科学基金(11902279);四川省科技计划项目(2020YJ0420);四川省科技计划项目苗子工程培育项目(2021098)。

摘　　要：利用二苯基甲烷二异氰酸酯和聚四亚甲基醚二对氨基苯甲酸酯通过预聚体法合成了一种功能性聚脲弹性体材料,并对其进行了γ射线辐照,研究了辐照前后试件的微观结构形态以及准静态和动态力学性能变化规律,红外光谱结果表明,合成了合格的聚脲分子结构,且辐照后该聚脲没有新的基团出现或消失。观察辐照后试件的表观形态发现,随着累积剂量的增加,试件颜色由淡黄色变为暗红色,且外侧面处颜色变化更为显著。与未辐照试件的性能相比,辐照累积剂量在60~150KGy的聚脲性能有显著提升;且聚脲在不同应变率下表现出由橡胶态向玻璃态转变的力学特征,表明合成的聚脲弹性体有良好的耐冲击和耐γ射线辐照性能。A functional polyurea elastomer material was synthesized from diphenyl-methane-diisocyanate and poly(1,4-butanediol)bis(4-aminobenzoate)by prepolymer method,and it was irradiated byγ-rays.The change law of microstructure morphology,quasi-static and dynamic mechanical properties of the samples before and after irradiation were studied.The results of infrared spectra showed that the qualified polyurea molecular structure was synthesized,and no new group appeared or disappeared after irradiation.After irradiation,it was found that with the increase of cumulative dose,the color of the specimen changed from light yellow to dark red,and the color change on the outer surface was more significant.Compared with the unirradiated specimens,the properties of the polyurea with cumulative irradiation dose of 60-150 KGy were significantly improved,and the polyurea exhibited the mechanical characteristics of the transition from rubber state to glass state at different strain rates,which shown that the polyurea synthesized had good impact resistance and gamma ray irradiation resistance.

关 键 词：聚脲弹性体 伽玛射线 辐照性能 力学性能 

分 类 号：TQ317[化学工程—高聚物工业]