化工新型材料

化工新型材料 ›› 2021, Vol. 49 ›› Issue (12) : 93-97. DOI: 10.19817/j.cnki.issn 1006-3536.2021.12.019

新材料与新技术

功能性聚脲弹性体的制备及γ射线辐照对其性能的影响

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

Li Junya¹, Guo Hui¹, He Chuan², Li Ketian², He Panqing², Jiang Xinyi¹

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Received		Published
2021-06-22		2021-12-20
Issue Date	Revised Date
2021-12-31	2021-06-22

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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。

Abstract

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 by γ-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 60-150KGy 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

Key words

polyurea / gamma ray / irradiation performance / mechanical performance

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功能性聚脲弹性体的制备及γ射线辐照对其性能的影响[J]. 化工新型材料, 2021, 49(12): 93-97 DOI:10.19817/j.cnki.issn 1006-3536.2021.12.019

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