不同中和度聚苯乙烯-丙烯酸粒子的聚乙二醇悬液剪切增稠特性研究  

Shear Thickening Properties of PEG Suspensions of PS-AA Particles with Different Degrees of Neutralization

作　　者：宋凯杰 王晓梅 万红敬 黄红军 SONG Kaijie 1, WANG Xiaomei 1, WAN Hongjing 1, HUANG Hongjun 2(1 Department of Physics and Chemistry, Ordnance Engineering College, Shijiazhuang 050003;2 Hebei Huanrui Chemical Industry Co.Ltd., Shijiazhuang 05000)

机构地区：[1]陆军工程大学石家庄校区军政基础系,石家庄050003 [2]河北环宸科技有限公司,石家庄050003

出　　处：《材料导报》2018年第A01期368-372,389,共6页Materials Reports

基　　金：国家自然科学基金(51103178)

摘　　要：实验采用无皂乳液聚合法,以NaHCO_3为中和剂,合成了一系列不同中和度的聚苯乙烯-丙烯酸(PS-AA)粒子。分别通过一步法、两步法合成了两种PS-AA粒子,并通过扫描电镜(SEM)观察了两种粒子的微观形貌。采用高能球磨法将粒子分散到聚乙二醇中,制备得到PS-AA/PEG剪切增稠液(STF),并通过动态流变仪稳态扫描测试了其聚乙二醇悬液的剪切增稠特性,结果表明用两步法合成的粒子作分散相可制备出优良的剪切增稠液。通过红外光谱、热重-DSC、扫描电镜、激光粒度分布仪对不同中和度的粒子进行了表征,并通过动态流变仪对其聚乙二醇悬液流变性能进行表征。结果表明,实验成功合成了不同中和度且表面光滑、粒径均一的核壳状的PS-AA粒子,并以此制备出性能优异的剪切增稠液,得出最优中和度为45%和50%。其中50%中和度PS-AA粒子,其质量浓度为64%的聚乙二醇悬液最大粘度高达2 200Pa·s,该性能在抗外力防护领域研究成果内出类拔萃。Emulsifier free emulsion polymerization was used,with NaHCO3 as neutralizing agent,respectively,by one step,two step synthesis,two kinds of polystyrene and acrylic particles（PS-AA）were produced,and by scanning electron microscopy（SEM）observation and contrast analysis the morphology of two kinds of particles.The particles dispersed in polyethylene glycol by high-energy ball milling method,preparation of PS-AA/PEG shear thickening fluid（STF）,and through the analysis of steady state dynamic rheometer,scanning test shear thickening behavior of the polyethylene glycol suspension,preparation of polymer particles to study using two step method;by infrared spectroscopy,scanning electron microscopy,thermogravimetric-DSC.Laser particle size distribution instrument of different degrees of neutralization particles were characterized by the characterization of the dynamic rheometer suspension rheological properties of polyethylene glycol.The results showed that different degree of neutralization of PSAA core-shell particles was synthesized with smooth surface,uniform particle size,and then shear thickening fluid was prepared,and the optimal degree of neutralization was 45% and 50%,of which 50% neutralization degree of PS-AA particles,the maximum viscosity of polyethylene glycol suspension concentration 64% up to 2 200 Pa·s,the performance in anti external protection field research results in the rise above the common herd.

关 键 词：中和度 剪切增稠 流变性能 

分 类 号：TQ31[化学工程—高聚物工业]