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1、超高分子量阳离子聚丙烯酰胺分散体系的制备与工艺研究摘要:本论文在综合相关文献基础上,对环境友好型阳离子聚丙烯酰胺水分散体系的制备和工艺进行了研究。1、根据大分子结构设计理论,以丙烯酰胺(AM)单体为主要原料,引入甲基丙烯酰氧乙基三甲基氯化铵(DMC)和甲基丙烯酰氧乙基-苄基-二甲基氯化铵(MBDAC)为阳离子共聚单体,以聚甲基丙烯酰氧乙基三甲基氯化铵(PDMC)为分散剂,选择水溶性偶氮化合物(V-50)为引发剂,在硫酸铵溶液中采用水分散聚合技术制备了稳定的P(DMC/AM)共聚物。2、系统考察了阳离子单体的配比、分散剂用量、无机盐浓度、引发剂用量等因素
2、对水分散聚合反应、产物分子量、流动性和水溶性的影响。通过正交试验法确定最佳反应条件为:阳离子单体配比为:1.7:1.3,分散剂用量为2.0%,引发剂用量1.39ml,引发温度为55℃,硫酸铵浓度为:21%。3、利用红外光谱(FTIR)、透射电镜(TEM)、激光粒度分布、激光光散射等分析手段对产品进行了表征。关键词:超高分子量阳离子聚丙烯酰胺水分散聚合33STUDIESONSYNTHESISANDAPPLICATIONOFAQUEOUSDISPERSIONOFCATIONICPOLYACRYLAMIDEWITHULTRAHIGHMOLECULARWEIG
3、HTOnthebasisoftherelevantliterature,thepreparationrules,theswellingandrheologypropertiesoftheaqueousdispersionofcationicpolyacrylamide,whichwasanenvironment-friendlytype,wereinvestigatedinthisthesis.1.Accordingtothemoleculardesignclues,thisresearchselectedacrylamide(AM)asmainraw
4、material,dimethylaminoethylmethacrylatemethylchloride(DMC)astheassistantmonomer,poly(dimethylaminoethylmethacrylatemethylchloride)(PDMC)asstabilizerandazo-compounds(V-50)asinitiator,thecationicpolyelectrolytewassynthesizedbyaqueousdispersionpolymerizationintheammoniumsulfatesolu
5、tion.2.Theeffectsofvaryingfactors,i.e.themolarratiosofDMC/PDMC,theconcentrationofthedispersant,theconcentrationofammoniumsulfate,thedosageofinitiator,molecularweightandthesolubilityofthesystemwereinvestigated.Bytheorthogonalexperiment,theoptimumconditionsofsynthesisweredetermine
6、dasfollows:thedosageofdispersant2.0%,theconcentrationofinitiator1.39ml,theinitiationtemperature55℃,theconcentrationofammoniumsulfate21%3.ThedispersioncopolymerswerecharacterizedwithFourierTransformInfra-Red(FTIR),theTransmissionElectronicMirror(TEM),theLaserParticle-sizeAnalyzer
7、andtheLaserLightScatteringInstrument.KeyWord:Ultra-highmolecularweight,cationicpolyacrylamide,aqueousdispersionpolymerization.33目录前言…………………………………………………………………………………11文献综述1.1聚丙烯酰胺简介……………………………………………………………21.1.1聚丙烯酰胺的结构和性能……………………………………………………21.1.2聚丙烯酰胺的类型及性质……………………………………………………21.
8、1.3丙烯酰胺自由基聚合反应概述………………………………………………41.1.4阳离子型聚丙烯