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ID:34826134
大小:2.56 MB
页数:69页
时间:2019-03-11
《有机无机核-壳粒子增韧环氧树脂的初步研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、复旦大学硕士学位论文有机/无机核-壳粒子增韧环氧树脂的初步研究姓名:朱立元申请学位级别:硕士专业:化学工程指导教师:钟伟20070515论文独创性声明本论文是我个人在导师指导下迸行的研究工作及取得的研究成果。论文中除了特别加以标注和致谢的地方外,不包含其他人或其它机拇已经发表或撰写过的研究成果。其他同志对本研究的启发和所傲盼贡献均已在论文中作了明确的声明并表示了谢意。作者签名:二圭二丘眨日期:之羔勉口论文使用授权声明本人完全了解复旦大学有关保留、使用学位论文的规定。即:学校有权保留送交论文的复印件,允许论文被查阅和借阅;学校可以公布论文的全
2、部或部分内容,可以采用影印、缩印或其它复制手段保存论文。保密的论文在解密后遵守此规定。作者签名:导师签名:日期:,主2幺纽复旦大学硕士论文有机无机核一壳粒子增韧环氧树脂的初步研究ABS’rRACTEpoxyrcsinsarethermosetmaterialcombiningattractiveproperties,suchashiighstrengthandstiffness,excellentdimensional,thermalaswellasenvironmentalstabifities.Epoxy·basedmaterialsa
3、rebeingappliedasmatrixresinsofcoatings,adhesivesandcomposites.Thewell—knowndrawbackassociatedwiththeapplicationofhighlycross-linkedthermosettingpolymersisrelatedtotheftinherentbrittlenesswhichincreaseswithcrosslinkingdensity.Therearebundleoftougheningmethodsinventedinpast,
4、e.g.rubberparticle,thermalplasticsparticle,core—shellpolymerparticle,interpenetrationnetwork,thermalliquidcrystalpolymer,hyperbranchedpolymerparticles,etc.Thesemethodseitherinvolvedsignificantcostimpactorreductionofthestiffnessandglasstransfertemperatureofthematerial.Core·
5、shellpolymerandhyperbranchedpolymerhavegoodperformanceonepoxytougheningwithoutsignificantlycompromisethematerialstiffnessandglasstransfertemperature.Bothofthesetwopolymershavesimilarparticlestructure:1)astiffcore:coretakesmajorweightandvolumepercentofthewholeparticle,SOthe
6、impactsonthetoughenedepoxy’Smechanicalandthermalpropertiesaredeterminedbycoreproperty.2)Theshelloftheparticleis㈥softpolymerchain,thustheshellCarlplaythetougheningroletoepoxysystem.∞Designtoaddtheepoxyfunctionalgroupsontheshellpolymer,makinggoodadhesivebetweentougheningpart
7、iclesandepoxymatrix.Thispaperdesigntograftpolymerfromnanosilicasurface,whichhavesimilarstructureascore-shellpolymerandhyperbranchedpolymer:1、Silicaparticleasthestiffcore∞“soft”polymerasshell.Inthispaper,effortsarepresentedtothreemajorportions:11Usingatomtransferradicaladdi
8、tion(ATRP)methodtograftPMMAfromsilicasurface.Throughthismethod,wegotsilicaparticleswithhi
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