本科生毕业设计(论文）I摘要随着人们环境保护意识的不断增强，开发绿色环保型产品已成为各行各业发展的主流方向。聚醋酸乙烯酯乳液俗称白乳胶，是应用最广的胶粘剂之一，由于它为水基胶粘剂，具有其他胶粘剂不可比拟的无毒、无腐蚀和优良的环保性能，并且原料来源广泛，成本较低，在胶粘剂中所占比例也越来越大，但白乳胶也存在一些性能上的不足，如耐水性，耐热性，抗蠕变性，耐寒性及耐机械稳定性等均较差。因此，需要对聚醋酸乙烯酯乳液的合成工艺进行研究，确定最佳工艺条件，或对聚醋酸乙烯酯乳液进行改性，以提高其各方面的性能，也扩大其应用领域。本文重点阐述了聚醋酸乙烯酯乳液合成原理，最佳合成工艺及改性研究。在其应用上，除普遍适用于木材的粘合以外，聚醋酸乙烯酯类胶粘剂正渐渐的被应用于建筑等很多行业，并且，本文针对目前研究较少的胶类降解的研究给予简单的分析。关键字：聚醋酸乙烯酯；合成；改性；应用本科生毕业设计(论文）IIAbstractAlongwiththeenhancementofpeople’senvironmentprotectionconsciousness,thegreenenvironmentprotectionproducthasbecomethemainstream.Thepolyvinylacetateemulsionisnamedthewhiteemulsion,whichisoneofthemostwidelyusedadhesives.Becauseitiswaterbaseadhesive,comparingwithotheradhesivesitisnon-toxic,non-corrosionandfineenvironmentprotectionperformance.Therawmaterialofpolyvinylacetateemulsioniswidespread,costslower,soitsproportionintheadhesiveismoreandmore.Butthewhiteemulsionalsohastheinsufficiencyinsomeperformance,likethewaterresistance,thethermalstability,theanticreep,theresistancetocoldandbearsmechanicalstabilityareallinfirmness.Therefore,weneedtoconducttheresearchtothepolyvinylacetateemulsionsynthesiscraft,andfindthebestcraftcondition,orcarryonthemodificationtothepolyvinylacetateemulsion.Wecanenhanceitsvariousperformancethroughthecraftimprovementandthemodificationoftheperformance,alsoexpanditsapplication.Thisarticleelaboratesthepolyvinylacetateemulsionsynthesisprinciple,bestsynthesiscraftandmodifiedresearch.Initsapplication,besidesitisgenerallyusedforthelumberagglutination,thepolyvinylacetateadhesiveisgraduallyappliedtotheconstructionandsoon.Inthisarticle,somesimpleanalysisofdegradationisalsomentioned.Keyword：polyvinylacetate;synthesis;application;modification本科生毕业设计(论文）III目录前言..............................................................1第一章胶粘剂概述...................................................21.1蛋白质类胶粘剂..................................................21.2聚丙烯酸酯类胶粘剂..............................................31.3聚氨酯类胶粘剂..................................................51.4环氧树脂类胶粘剂................................................61.5聚醋酸乙烯酯类胶粘剂............................................7第二章聚醋酸乙烯酯乳液的合成.......................................82.1聚醋酸乙烯酯合成基本原料........................................82.2合成原理.......................................................112.3合成方法.......................................................122.4工艺条件影响...................................................16第三章聚醋酸乙烯酯乳液的应用......................................223.1聚醋酸乙烯酯作为木材胶粘剂.....................................223.2其它方面的应用.................................................23第四章聚醋酸乙烯酯乳液胶粘剂发展方向..............................264.1聚醋酸乙烯酯改性研究...........................................264.2可降解化处理...................................................36结论........
