壳层交联单体量对中空苯丙乳胶粒性能的影响  

Effect of Cross-linking Monomer Use Level in the Shell on Performance of Hollow Styrene-Acrylic Latex Particles

作　　者：袁腾[1,2] 杨卓鸿[1] 邵庆辉[2] 王锋[2] 胡剑青[2] 涂伟萍[2] 

机构地区：[1]华南农业大学材料与能源学院,广东广州510642 [2]华南理工大学化学与化工学院,广东广州510640

出　　处：《建筑材料学报》2016年第1期191-197,共7页Journal of Building Materials

基　　金：广东省自然科学基金资助项目(2015A030313207);广东省公益研究与能力建设项目(2015A010105004;2015A010105023;2013B080200004;2013B090600004)

摘　　要：采用交联改性的原位聚合封装非溶剂法制备了粒径分布均匀、单分散性良好的中空苯丙聚合物乳胶粒,并采用凝胶率分析、粒径分析仪、黏度计、酸值测量、扫描电镜（SEM）、透射电镜（TEM）、紫外-可见光分光光度计、差示扫描量热分析（DSC）表征考察了壳层中交联单体用量对中空聚合物乳胶粒的合成过程、形态及其干膜遮盖性的影响.结果表明,在其他条件不变的情况下,壳层中交联单体的含量（以其占总单体质量的百分数计,下同）小于15%时,含量越低,壳层强度越低,乳胶粒致孔膨胀时易于塌陷,粒径分布越大;壳层中交联单体含量大于20%时,含量越高,壳层强度越高,乳胶粒尺寸变小,膨胀变得困难;当壳层中交联单体的含量为15%～20%时,粒径分布均匀,壳层强度适中,膨胀性较好,此时含有中空乳胶粒的干膜遮盖性能最好.The hollow polymer latex particles with uniform size and good monodispersity were made by insitu polymerization with the non-solvent method of encapsulation with cross-linking modification,and the effect of cross-linking monomer（DVB）use level in the shell on the synthesis process,morphology and opacity of the hollow polymer latex particles and its dry film was investigated by particle size analyzer,viscometer,acid value analysis,SEM,TEM and UV-Vis spectrophotometer,differential scanning calorimetry.Test results show that when the cross-linking monomer content（by mass）in the shell is less than15% of the total monomer used,because the reduction of the cross-linking monomer contents in the shell,the strength of the shell of the hollow polymer latex particles decreases,which causes the hollow polymer latex particles to be easily collapsed as well as a wider particle size distribution when the pore was swelling.When the content is greater than 20%,with the increase of the cross-linking monomer use level in the shell,the strength of the shell increases and the particle size of polymer latex particles decreases,which makes the swelling become difficult.When the content is between 15%-20%,the particle size distribution is uniform,shell strength is moderate with better swelling property,the film obtained from the dried emulsion which contained the hollow polymer latex particles show the optimal opacity performance.

关 键 词：建筑材料 原位聚合 中空苯丙乳胶粒 交联单体 遮盖性 

分 类 号：TQ638[化学工程—精细化工] TU56[建筑科学—建筑技术科学]