资源描述：
《毕业论文-张巍-最终》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。
1、蒙脱土是层状结构的硅酸盐，即由中心层为铝或氧化镁的八面体，层外为二氧化硅四面体所构成的层状结构所组成。超支化聚合物由于具有独特的结构和性能而成为研究热点之一。本论文成功地合成了超支化有机蒙脱土。结果表明，有机蒙脱土经超支化改性后，呈纳米片层结构，改性后的有机蒙脱土具有较大的层间距。本论文成功地将超支化有机蒙脱土应用到天然橡胶中，提高了橡胶的物理机械性能。实验结果表明，加入4份超支化蒙脱土的天然橡胶可以取代40份炭黑所带来的补强效果。加入超支化蒙脱土后，天然橡胶所表现出的拉伸强度、断裂伸长率和300%定伸强度得到提高。热
2、失重分析显示，与有机蒙脱土相比，经过超支化改性的有机蒙脱土的热稳定性能得到提高，其中热失重中心温度提高了20°Co关键词：超支化改性技术，蒙脱土，天然橡胶，插层ApplicationofHyperbranchedMontmorilloniteinNaturalRubberSystemsABSTRACTHyperbranchedpolymersareoneofthestudyinghotspotsbyscientistsinthepolymerfieldbecauseoftheirspecialstructuresand
3、properties.Thepreparationmethodsofhyperbranchedpolymers,forexample,thecondensationreaction,additionreaction,ring-openingreaction,graftingreactionetc.areintroduced.Theresearchandapplicationsofhyperbranchedpolymersarepresented,suchassynthesizingblockcopolymers,tou
4、gheningforpolymer,slowreleasingagentfbrmedicineetc.Inthisarticle,wedescribthepreparationofhyperbranchedorganicmontmorilloniteandifsapplicationinnaturalrubber.Inthispaper,hyperbranchedOMMTwithhydroxyl(-OH)groupsisprepared.ThisOMMThasdifferentintercalatingdegreeof
5、silicatelayers,whichisduetothespecialstructureandintercalationproperties・Theorganicmontmorilloniteisusedandasaresult,thehyperbtanchedOMMTshowstheintercalatingdegreeofsilicatelayers.ThehyperbranchedOMMTmodifiednaturalrubberhasgoodmechanicalpropertieswiththeadditi
6、veofthiskindofhyperbranchedOMMT.Inthisarticle,thehyperbranchedOMMTissuccessfullysynthesizedandimprovedthemechanicalpropertiesofnaturalrubber.Thetensilestrengthofnaturalrubberwith4-5phrhyperbranchedOMMTisthebest.Thispropertyisequalto40phrcarbonblackstensilestreng
7、th.Intheformulaofthebestcomprehensiveperformance,acalciumcarbonatefillernaturalrubbershowsahighertensilestrength,elongationatbreakand300percentstrengthofthestretch.TGAanalysisshowsthat,comparedwiththatofmontmorillonite,theweightlosscentertemperatureofhyperbranch
8、edOMMTincreased20°C,whichalsoshowsthethermalstabilityisimproved・Keywords:hyperbranched,montmorillonite,naturalrubber,intercalate超支化有机蒙脱土在天然橡胶中的应用性能研究张巍0412042230引言纳米复
