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制备了纳米CaCO3/丙烯酸树脂浆液,当浆液(48gZ-26、50g纳米CaCO3和83.3g二甲苯)中分散剂添加量为3g时,Casson屈服应力!C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!C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.
The nano-CaCO3 / acrylic resin slurry was prepared. When the amount of dispersant in the slurry (48gZ-26, 50g nano-CaCO3 and 83.3g xylene) was 3g, the Casson yield stress had the smallest value of C and the stability of the slurry was the best. The rheological properties of the nano-CaCO3 / acrylic resin syrup showed that the flow characteristics of the system accord with the Casson model, the yield stress of the system is smaller and the stability is better. The viscosity of the slurry increases with the shear rate With a clear shear thinning characteristics, and with the increase of nano-CaCO3 content, the trend of shear thinning is enhanced. In the investigated range of low shear rate, the nano-CaCO3 slurry has obvious thixotropy, And the greater the content of nano-CaCO3 thixotropy greater Figure 10, Table 7, reference 8.