Epoxy-POSS/silicone rubber nanocomposites with excellent thermal stability and radiation resistance

作     者：Mengni Shi Yinyong Ao Lei Yu Lang Sheng Shuangxiao Li Jing Peng Hongbing Chen Wei Huang Jiuqiang Li Maolin Zhai Mengni Shi;Yinyong Ao;Lei Yu;Lang Sheng;Shuangxiao Li;Jing Peng;Hongbing Chen;Wei Huang;Jiuqiang Li;Maolin Zhai

作者机构：Beijing National Laboratory for Molecular SciencesRadio Chemistry and Radiation Chemistry Key Laboratory of Fundamental ScienceThe Key Laboratory of Polymer Chemistry and Physics of the Ministry of EducationCollege of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China Institute of Nuclear Physics and ChemistryChina Academy of Engineering PhysicsMianyang 621900China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2022年第33卷第7期

页      面：3534-3538页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：financially supported by the Science Challenge Project(No.TZ2018004) the National Natural Science Foundation of China(NSFC,Nos.11575009 and 12075010) 

主　　题：POSS Silicone rubber Thermal stability Radiation resistance Radiation crosslinking and degradation mechanism 

摘      要：Due to the rigid Si-O-Si backbone,silicone rubber(SR)have a widespread application in extreme environment such as high temperature and high-level ***,the radiation stability of SR still does not meet the practical needs in special radiation *** we prepared epoxy POSS(e POSS)/SR nanocomposites with excellent thermal stability and radiation *** a physical crosslinking point in the SR,addition of small amount of ePOSS not only enhanced the mechanical properties of the matrix,but also improved its thermal stability greatly due to their good compatibility.e POSS/SR had higher radiation stability in air than SR owing to the inhibition of radiation oxidation by ePOSS,and the yield of main gaseous radiolysis products(CH_(4),H_(2),CO and CO_(2))of SR and ePOSS/SR nanocomposites was *** analyzing the changes of chemical structure,thermal properties and mechanical properties of the ePOSS/SR nanocomposite,combined with the characteristics of gas products afterγ-irradiation,the radiation induced crosslinking and degradation mechanism of the nanocomposites was proposed comprehensively.