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基于PEO的杂臂星型聚合物的合成.docx

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基于PEO的杂臂星型聚合物的合成 摘要： 杂臂星型聚合物是一类以多个功能基团为中心，具有分支肢和主链的三维聚合物结构，具有广泛的应用前景。本文以硅烷基和螯合基为中心，通过PEO单体与活性烯丙基化学亲和反应合成了一系列杂臂星型聚合物。通过FT-IR、1HNMR和GPC等手段对产物进行表征，证明了产物的成功合成。同时，研究了不同比例PEO单体引入的影响，并探究了杂臂星型聚合物在水中的自组装行为和热响应性能。结果表明，PEO单体比例不足时，聚合物分子间作用力较弱，自组装行为不明显；但过多引入PEO单体则会导致聚合物水溶性增强，自组装能力下降。此外，随着温度升高，聚合物分子链会发生收缩，导致自组装形态发生改变。本研究为基于PEO的杂臂星型聚合物的合成和应用提供了一定的参考。 Abstract: Heteroarmstar-shapedpolymersareaclassof3Dpolymerstructureswithmultiplefunctionalgroupsatthecenter,branchingarms,andmainchains.Theyhavebroadapplicationprospects.Inthisstudy,aseriesofheteroarmstar-shapedpolymersweresynthesizedthroughthechemicalaffinityreactionbetweenPEOmonomersandactiveallylgroupsbasedonsilaneandchelatinggroups.TheproductswerecharacterizedbyFT-IR,1HNMR,andGPC,provingthesuccessfulsynthesisoftheproducts.TheinfluenceofdifferentproportionsofPEOmonomerswasstudied,andtheself-assemblybehaviorandthermalresponsivenessoftheheteroarmstar-shapedpolymersinwaterwereexplored.TheresultsshowedthatwhentheproportionofPEOmonomerswasinsufficient,theintermolecularforcebetweenpolymermoleculeswasweak,andtheself-assemblybehaviorwasnotobvious.However,excessiveintroductionofPEOmonomersenhancedthewatersolubilityofthepolymerandweakeneditsself-assemblyability.Inaddition,asthetemperatureincreased,thepolymerchainswouldshrink,resultinginachangeintheself-assemblymorphology.Thisstudyprovidesareferenceforthesynthesisandapplicationofheteroarmstar-shapedpolymersbasedonPEO. Keywords:heteroarmstar-shapedpolymer,PEOmonomer,self-assembly,thermalresponsiveness Introduction: Heteroarmstar-shapedpolymersareaclassof3Dpolymerstructuressynthesizedusingmultifunctionalcoremoleculeswithbranchingarmsandmainchains.Duetotheirdistinctmolecularstructure,thephysicalandchemicalpropertiesofheteroarmstar-shapedpolymersaredifferentfromthoseoflinearpolymers,whichleadtotheiruniqueproperties,suchashighsolubility,highstability,andhighbioactivity[1-3].Amongtheheteroarmstar-shapedpolymers,theuseofpoly(ethyleneoxide)(PEO)monomersasbranchpointshasattractedgreatattentionbecauseo