59加工与应用NO.022023塑料科技PlasticsScienceandTechnologyHTPB液体橡胶/纳米SiO2协同增韧环氧树脂的研究何勇1,陈金威1,张卫康2,田烨杰1*(1.国网浙江省电力有限公司嘉善县供电公司,浙江嘉兴314100;2.嘉善恒兴电力建设有限公司,浙江嘉兴314100)摘要:为了解决单一材料改性环氧树脂(EP)综合性能不足的问题,采用端羟基聚丁二烯(HTPB)和纳米二氧化硅(SiO2)对EP进行协同改性。结果表明:HTPB的端羟基和纳米SiO2表面的硅羟基可以与树脂基体的环氧基团反应,形成良好的界面结合。HTPB可以显著提升EP的韧性,但增强作用有限,且耐热性较差。纳米SiO2能够起增强、增韧作用,同时也具有很好的热稳定性,但增韧效果不如HTPB。采用两者共同改性EP,具有很好的协同增强增韧效果。当HTPB添加量为3份、纳米SiO2添加量为1份时,复合材料的拉伸强度、弯曲强度和冲击强度相比于未改性EP,分别提升52.3%、54.0%和106.5%。添加HTPB和纳米SiO2后,复合材料相比纯EP具有更低的介电常数。关键词:环氧树脂;液体橡胶;纳米二氧化硅;力学强度;冲击韧性中图分类号:TQ322.4+1文献标识码:A文章编号:1005-3360(2023)02-0059-05DOI:10.15925/j.cnki.issn1005-3360.2023.02.012SynergisticTougheningofEpoxyResinbyHydroxylTerminatedPolybutadieneLiquidRubber/NanoSiO2HEYong1,CHENJin-wei1,ZHANGWei-kang2,TIANYe-jie1*(1.JiashanPowerSupplyCo.,StateGridZhejiangElectricPowerCo.,Ltd.,Jiaxing314100,China;2.JiashanHengxingElectricPowerConstructionCo.,Ltd,Jiaxing314100,China)Abstract:Inordertosolvetheproblemofinsufficientcomprehensiveperformanceofepoxyresin(EP)modifiedbysinglematerial,hydroxyl-terminatedpolybutadiene(HTPB)andnanosilica(SiO2)wereusedtosynergisticallymodifyEP.TheresultsshowthattheterminalhydroxylgroupofHTPBandthesiliconhydroxylgrouponthesurfaceofnanoSiO2canreactwiththeepoxygroupoftheresinmatrixtoformagoodinterfacebonding.HTPBcansignificantlyimprovethetoughnessofEP,buttheenhancementeffectislimitedandtheheatresistanceispoor.NanoSiO2canplayaroleinbothstrengthandtoughness,andalsohasgoodthermalstability,butthetougheningeffectisnotasgoodasHTPB.UsingbothtomodifyEPhasagoodsynergistictougheningeffect.WhentheadditionamountofHTPBis3phrandtheadditionamountofnanoSiO2is1phr,...