聚氨酯-聚丙烯酸酯复合乳液合成和性能.pdf

摘疆摘要豢氨囊~浆嚣烯羧魏(列焱)复会翼滚绩合了聚懿熬<Pu)翼液秘聚嚣爆酸酯(瓢) 乳液的优良特性,成本低廉,是具有广阔应用前景的第三代水性Pu。零文采麓反樱核爨孚L滚聚合法,潋甲苯二舅氧酸鼗(秘I),聚醚二元黪(N210), 二羟甲基丙酸(DMPA.)。本文磷究了荤舔静类彝雩|发麓静类对PUA孚k滚貔肇l备帮毽黢夔影貔;考察T DMPA 含量、R值、中和度、残留NCO百分比,胺扩链剂含量,单体含量,引发剂用量等配方因素辩PUA霉￡渡戆毒l备帮牲熊夔影璃;褥至l了潮套木器漆曩PUA翼液耱最佳鬏辩选箨鞫配方。零文对三萋孛工艺路线制餐PUA嚣滚懿特点遴嚣了瓣}￡礴究,发瑷攀薅孛秘工艺套装氨酯预聚体中和时用乙烯基单体代替有机溶剂降粘,因此可大量减少溶剂用爨,具有成本氨、污染小、工艺麓单翡馥点;由予该工艺不#i-:JH嚣纯裁,劳能蕊零俸充分溶涨在魁种子熙,使得五烯基单体和聚氯酯在分子水平上缠结在一起,乳液聚台时易于得到大小均匀、影态溉整的其襄核壳缀镌载PUA巍胶靛,著在核轰之鹅易发生攘技或螭互贯穿, 从而得到性能更加优肄的产品。零文研究了翼纯滋度、分数速度、摹L滚聚合湿度簿_I艺参数对PUA嚣滚剃备帮经缝的影响。考察了二羟甲基丙酸加料方斌和引发剂加料方式对PUA制备和性能的影响。得至l了翅备PUA飘渡豹簸佳工艺条棼; 本文对PUA乳液聚合的聚合动力学进行了初步探索,得到聚合速率和单体浓度、引发裁惩基数慕零关系。本文通过激光粒度分析、傅立叶变换红外光谱(FTIR)分析和示差扫描嫩热(DSC) 分辑慰会残懿PUA翼滚送行了续兹表缓,结果表疆PUA翼蔽糖装经大,分毒窄;P毽秘 PA两相有较好的相容性,但仍存在微相分离状态,这说明设计的反相核壳乳液聚合得到了实现,合成豹PUA魏液巍胶粒其有骥显妁核壳结构姆惩。美键镧:聚氯薅一聚瓣烯酸臻;单落中秘工慈;反褪挟壳魏液浆含;核宠结梭牮嘉理王大学工学硬±学位论文 ABSTRACT Polyurethane-polyacrylate(PUA)hybrid emulsion with a low bines good properties ofpolyurethane(p玢emulsion andpolyaerylate(PA)emulsion。It isthethird generation aqueous polyurethane and ithas awideapplyperspective. An aqueous polyurethane—polyacrylate(PUA)hybrid emulsion with core-shell structure WaSprepared by reverse COre—shell emulsion polymerization from toluenediisoeyanate(TDl), polyether binaryalcohol(N210),dimethylol propionic acid(DMPA)and vinyl monomers e耋c。弧e effects ofdifferentvinyl monomers and differentinitiators on thepreparation and properties of PUA hybrid emulsion were position factors such asDMPA content,R valaue(nNco]noH),neutralization degree,free Ne0%,ethylene diamine(EDA)content,monomer content,initiator content etc.,on theproperties ofPUA hybridemulsion and itsfilm werestudied。n蛇optimal raw materialselectionand reaction formulation were obtained. Three differentprocess pared on theeffects ofproperties of PUA themonomer neutralization process,vinyl monomer was added intopolyurethane prepolymer during neutralization todecrease viscosity oftheprepolymer anic solvent,SO the costWaSreduced,process