侧链含偶氮苯的环状两亲性嵌段聚合物的合成与其性能分析

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1、SynthesisandPerformanceofCyclicAmphiphilicBlockCopolymersBearingAzobenzeneSideChainsAbstractSynthesisandPerformanceofCyclicAmphiphilicBlockCopolymersBearingAzobenzeneSideChainsAbstractOwingtotheabsenceofchainends,thepolymerswithringtopologystructurehaveshownfantasticperformanceinsolutionorbulksta

2、te.Withthedevelopmentinsyntheticmethods,macromolecule’sresearchershavegivenmoreandmoreattentionstothecyclicpolymersinrecentyears.Atpresent,themostimpressiveonesabouttheresearchresultsobtainedfromthecyclicpolymersisfromamphiphiliccyclicpolymers.Theamphiphiliccyclicpolymershavedisplayedmanyuniquepr

3、opertiesbasedontheself-assembledaggregates,becausetheir“endless”topologyreduceschainentanglementincontrasttothelinearones.However,theresearchesofcyclicpolymersarelimitedowingtothecomplicatedanddifficultstructureconfirmationforapurepolymer.Althoughtherehavebeensomeinterestingresearchreportsaboutcy

4、clicamphiphilicpolymers,theyhaveonlyasmallnumbercomparedwithotheramphiphilicpolymers.Forexample,thestimulus-responsecyclicamphiphilicpolymerhasseldombeenseldomresearchedsofar.Azobenzenegrouphasatypicalcharacteristicofthereversibletransformationbetweenthetrans-andcis-isomerizationinducedbylight.Li

5、ghtresponsiveself-assemblyaggregatescanbeobtainedbyintroducingazobenzeneintotheamphiphilicpolymer.Inaddition,polymerscontainingcarboxylgroupsareresponsivetotheenvironmentwherealittlechangestopHareproduced.Asaresult,thesolubilityofthechainsegmentisreversiblychangedbetweenhydrophilicandhydrophobics

6、tate.Inthisthesis,cyclicamphiphilicblockcopolymersbasedonstimulus-responsetopHandlight,containingazobenzeneandcarboxylgroupsinsidechains,weredesignedandsynthesizedbycombiningATRPwithCuAACchemistry.Then,thetopologyeffectsofringstructureontheself-assemblyprocessofcopolymersinsolutionandthestimulus-

7、responseofobtainedaggregatestopHandlightwereinvestigatedbycomparisonofthecorresponsivelinearprecursors.Thedetailedresearchesaresummarizedasthefollowing:AbstractSynthesisandPerformanceofCyclicAmphiphilicBlockCopolymersB