纳米TiO_2在不饱和聚酯中的分散性及力学性能  

Dispersion Behavior of Nano-TiO_2 in Unsaturated Polyester Resin and Mechanical Properties

作　　者：徐状[1] 杜芳林[1] 

机构地区：[1]青岛科技大学材料科学与工程学院,山东青岛266042

出　　处：《青岛科技大学学报（自然科学版）》2010年第3期234-237,共4页Journal of Qingdao University of Science and Technology:Natural Science Edition

基　　金：国家科技支撑计划资助项目(2007BAB27B01)

摘　　要：分别采用机械搅拌和三辊研磨机对纳米二氧化钛和不饱和聚酯树脂的混合物进行共混处理,制备了不同质量分数纳米TiO2的不饱和聚酯树脂复合材料(TiO2/UPR);并对纳米TiO2在基体中的分散性及混合物的黏度进行了表征。结果表明:研磨处理比机械搅拌处理的TiO2/UPR复合材料分散更均匀,粒径更小。纯树脂和TiO2/UPR混合物的黏度均随混合处理时间的增加有升高的趋势,在交联以前,TiO2/UPR混合物的黏度比纯树脂的黏度显著提高,但纯树脂在研磨处理2 h后产生严重交联,黏度急剧升高。添加纳米TiO2提高了TiO2/UPR复合材料的力学性能。与纯树脂相比,添加纳米TiO2质量分数3.0%时,TiO2/UPR复合材料的拉伸强度提高了63%,弯曲强度提高了17%;添加纳米TiO2质量分数1.0%时,冲击强度提高了6.1%。TiO2 nanoparticles are dispersed in the unsaturated polyester resin solution using mechanical agitation and three-roll muller,respectively,to prepare the unsaturated polyester resin composites（TiO2/UPR） with different TiO2 contents.Subsequently,the dispersion behavior of TiO2 nanoparticles in the UPR matrix and the viscosity of mixture are characterized.The results show that TiO2/UPR composites treated with milling have better dispersity and less grain pathway in contrast with the TiO2/UPR composites treated with agitation.The viscosities of pure resin and TiO2/UPR mixture increase with prolonging milling time,but the viscosity of TiO2/UPR mixture increases more sharply than the pure resin while crosslink decreases after 2 h milling.When adding 3.0 wt % TiO2,the tensile strength and bending strength of TiO2/UPR are improved 63 % and 17 %,respectively,in contrast with the pure UPR.Additionally,when adding 1.0 wt%TiO2,the impact strength is reinforced over 6.1 %.

关 键 词：不饱和聚酯树脂 纳米TIO2 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]