纯丙乳液的合成与实验.docx

摘要本论文采用种子乳液聚合方法及半连续乳液聚合方法采用甲基丙烯酸甲酯（MMA）、丙烯酸丁酯（BA）为软硬单体组分加入少量的自交联单体a-甲基丙烯酸（a-MAA）合成了聚丙烯酸酯乳液。探讨了软硬单体配比、乳化剂用量以及阴/非离子乳化剂配比、氨水用量、引发剂用量、pH值以及聚合工艺中反应温度、搅拌速度、反应时间等参数对纯丙乳液聚合稳定性、乳液性能及外观的影响研制出最佳配方。结果表明当w(乳化剂)=3%w(引发剂)=0.5%pH在7～8左右时涂膜的吸水率达到9.65%钙离子稳定性均通过测试纯丙乳液具有较好的综合性能。并对共聚物的结构和乳液的性能进行表征：纯丙乳液的红外光谱（FTIR）测试结果表明丙烯酸酯类单体之间发生了自由基共聚反应；纯丙乳液XRD测试及分析表明纯丙乳液成膜后为非晶态物质。各项测试表明纯丙乳液贮存稳定。关键词：纯丙乳液；乳液聚合；最佳配方；性能测试；表征AbstractThesynthesisofpureacrylicemulsionwaspreparedbyseedslatexpolymerizationandstudiedbysemi-continuousemulsionpolymerizationadoptingmethylmethacrylate(MMA)assoftcomponentsandbutylacylate(BA)ashardmonomercomponentsandaddingalittleself-crosslinkingmonomerofa-methacrylicacid(a-MAA).TheeffectsoftheratioofsoftandhardmonomertheratioandtheleverofemulsifierstheleverofammoniasolutiontheleverofinitiatorpHvalueandpolymerizationtemperaturestirringratereactiontimeandsooninthesystemonthestabilityofemulsionpolymerizationpropertiesandappearanceoflatexarediscussed.Thenthebestformulasweremadeout.Theresultsshowedthatwhenemulsionwas3%initiatatorwas(0.35%)PHvaluewasaround7～8waterabsorbabilityreached9.65%theemulsionhaveexcellentCa2+stability.Thepropertiesofpureacrylicemulsionandfilmsarediscussed.TheanalyzedresultsofFourierTransformInfraredSpectroscopy(FTIR)showthattheradicalcopolymerizationhashappenedamongthemonomers;theanalyzedresultsofX-RayDiffractomer(XRD)showthatthefilmofpureacrylicemulsionisamorphousmaterial.Alltestsindicatethelatexeshavegoodstability.Keywords:pureacrylicemulsion;emulsionpolymerization;thebestformula;testofproperty;characterization目录第一章绪论---------------------------------------------------11.1前言11.2国内外纯丙乳液的研究现状与发展21.2.1纯丙乳液聚合中微量单体的引入21.2.2纯丙乳液乳化体系的研究进展21.2.3纯丙乳液引发体系的研究进展41.2.4纯丙乳液粒子设计与聚合工艺进展41.3改善纯丙乳液性能的最新聚合工艺和技术71.3.1核-壳乳液聚合71.3.2互穿网络聚合91.3.3无皂乳液聚合101.3.4基因转移聚合101.3.