纳米CaCO3/丙烯酸树脂浆液的流变性

制备了纳米CaCO3/丙烯酸树脂浆液,当浆液(48 gZ-26、50g纳米CaCO3和83.3 g二甲苯)中分散剂添加量为3 g时,Casson屈服应力τc值最小,浆液的稳定性最好,与工艺条件优化时所得到的一致.纳米CaCO3/丙烯酸树脂浆液的流变性研究表明:该体系的流动特性符合Casson模型,其屈服应力τC较小,稳定性较好;浆液的黏度随剪切速率增加而显著下降,具有明显的剪切稀化特性,且随着纳米CaCO3含量增加,其剪切稀化趋势增强;在所考察的低剪切速率范围内,纳米CaCO3浆液具有明显的触变性,且纳米CaCO3含量越大触变性越大.图10,表7,参8.

Rheological Property of Nanometer Calcium Carbonate / Acrylic Resin Slurry

The nano-CaCO3(nanometer calcium carbonate) / acrylic resin slurry was prepared. When the dispersant dosage in the slurry(48 g Z-26, 50 g nano-CaCO3 and 83.3 g xylene) was 3g, Casson yield stress TC was the smallest and the slurry stability was the best. And was is consistent with that of the optimized technological condition. The rheological property of the nano-CaCO3 / acrylic resin slurry was investigated. The results show that the rheological property in this system conforms to the Casson model, with a small yield stress (TC) and good stability; the slurry viscosity decreases obviously when the shear rate drops, characterized by obvious sheer thinning and as the nano-CaCO3 content increases, its sheer thinning improved; within the observed low sheer rate, the nano-CaCO3 slurry shows obvious thixotropy and the more the nano-CaCO3 content, the obvious the thixotropy.10figs.,7tabs.,8refs.