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1、摘要单分散交联聚合物微球因其具有良好的耐热和耐溶剂性能、力学性能、吸附性能以及表面活性，在生物医药、电子信息、分析化学、标准计量及环境保护等许多领域有着广阔的应用前景，对其研究与开发受到越来越多的重视。本论文首先研究分散聚合法制备单分散交联聚苯乙烯微球，采用种子溶胀法加工工艺，并选择了合理的分散聚合体系，考察不同分散聚合参数，诸如：初始单体浓度、溶胀剂种类、溶胀时间、交联剂浓度等因素对聚合体系稳定性、微球粒径及其分布的影响和变化规律。根据TGA分析表明，随着温度的升高所制备聚合物微球材料失重比率迅速增加，这是因为加入交联剂的聚苯乙烯微球的
2、分子结构发生了改变，使原来具有线性结构的分子变成的体形分子结构，大大增大了它的热学性能和力学性能，故具有比非交联聚苯乙烯微球较高的热分解温度。采用活性溶胀聚合法成功制得大粒径单分散由的交联聚苯乙烯微球，实验得出以1,2-二氯乙烷为溶胀剂、DOA为助溶胀剂时，制得窄分布且最大粒径为3.195μm的交联聚苯乙烯微球，实验结果也表明己二酸二辛酯具有较好的溶胀效果。关键词：聚苯乙烯微球；TGA分析；交联聚苯乙烯微球IIIABSTRACTMonodispersecrosslinkedpolymermicrospheresbecauseofitsex
3、cellentheatandsolventresistance,mechanicalproperties,adsorptionpropertiesandsurfaceactivity,biomedicine,electronicinformation,analyticalchemistry,andenvironmentalprotectionstandardmeasurementinmanyareashasbroadpotentialapplicationsforitsresearchanddevelopmentbymoreandmore
4、attention.Inthisthesisresearchdispersionpolymerizationmonodispersecrosslinkedpolystyrenemicrospheres,usingthemethodofseedswellingprocessandchooseareasonabledispersionpolymerizationsystem,effectsofdifferentdispersionpolymerizationparameters,suchas:theinitialmonomerconcentr
5、ation,typeofswellingagent,swellingtime,thecrosslinkerconcentrationonthepolymerizationsystemstability,particlesizeandsizedistributionofandvariation.IntheTGAanalysisshowedthatwithincreasingtemperaturethepreparationofthepolymermicrospheresrapidweightlossrate,andthisisduetoth
6、eadditionalcrosslinkingpolystyrenemicrospheresmolecularstructureischanged,theoriginalstructureofthemoleculewithalinearthebodybecomesthemolecularstructure,whichgreatlyincreasesitsthermalandmechanicalproperties,ithasaratioofnon-crosslinkedpolystyrenemicrosphereshighthermald
7、ecompositiontemperature.Usingreactiveswellingandpolymerizationsuccessfullypreparedbyalargemonodispersecrosslinkedpolystyrenemicrospheres,theexperimentalresultsof1,2-dichloroethaneastheswellingagent,DOAistohelptheswellingagent,toobtainanarrowdistributionandamaximumparticle
8、sizeof3.195μmcrosslinkedpolystyrenemicrospheres,experimentalresultsshowthatdioctyladipatehavinga
