二氧化锰混合体系在聚硫密封剂中的应用  

Application of manganese dioxide mixed system in polysulfide sealant

作　　者：张立国 陈京帅 吴松华 ZHANG Li-guo;CHEN Jing-shuai;WU Song-hua(AVIC First Aircraft Institute,Xi’an 710089,China;School of Chemistry and Chemical Engineering,Anhui University,Hefei 230601,China;Beijing Institute of Aeronautical Materials Co.,Ltd.,Beijing 100094,China)

机构地区：[1]航空工业第一飞机设计研究院,陕西西安710089 [2]安徽大学化学化工学院,安徽合肥230601 [3]北京航空材料研究院股份有限公司,北京100094

出　　处：《应用化工》2024年第3期588-591,共4页Applied Chemical Industry

基　　金：安徽省自然科学基金(2108085QB48);安徽省高校自然科学研究重点项目(KJ2021A0029,KJ2021A0033)。

摘　　要：通过水热合成法制备出3种不同晶型的二氧化锰,通过X射线衍射(XRD)和扫描电镜(SEM),最终分别确定δ-MnO_(2),γ-MnO_(2)和α-MnO_(2)这三种晶型。利用非介入式材料均质机进行物理混合制备了一系列二氧化锰混合体系。探究不同晶型二氧化锰、不同二氧化锰混合体系对聚硫密封剂的硫化性能和力学性能的影响。研究表明,用δ-MnO_(2)作为硫化剂硫化后的聚硫密封剂具有更好的力学性能。在不同混合体系中,δ-MnO_(2)和Mn_(2)O_(3)定量存在有助于聚硫密封剂的硫化,有利于提高聚硫密封剂的力学性能。Three different crystalline forms of manganese dioxide were prepared by hydrothermal synthesis,and the three crystalline forms ofδ-MnO_(2),γ-MnO_(2)andα-MnO_(2)were finally determined by X-ray diffraction(XRD)and scanning electron microscopy(SEM).A series of manganese dioxide hybrid systems were prepared by physical mixing using a non-invasive material homogenizer.The effects of different crystalline manganese dioxide and different manganese dioxide blending systems on the vulcanization properties and mechanical properties of polysulfide sealants were investigated.The study showed that the polysulfide sealants vulcanized withδ-MnO_(2)as vulcanizing agent had better mechanical properties.The quantitative presence ofδ-MnO_(2)and trivalent manganese in different mixing systems contributes to the vulcanization of polysulfide sealants and is beneficial to improve the mechanical properties of polysulfide sealants.

关 键 词：二氧化锰 聚硫密封剂 混合体系 晶型 硫化 

分 类 号：TQ436.6[化学工程]