考察了未改性纳米CaCO3/邻苯二甲酸二辛酯(DOP)浆液(DOP-1)、改性纳米CaCO3 WO-12/DOP浆液(DOP-2)和改性纳米CaCO3WO-13/DOP浆液(DOP-3)的流变性,以评价纳米CaCO3的改性效果,结果表明:纳米CaCO3/DOP浆液的流动特性均符合Casson模型;与DOP-1和DOP-3相比,DOP-2黏度较低,Casson屈服应力较小,稳定性较好,触变性较大.说明改性纳米CaCO3WO-12与DOP相容性好,其改性效果最佳,与其在丙烯酸树脂中分散效果最好一致.纳米CaCO3/DOP浆液流变性可用于评价纳米CaCO3的改性效果.%The rheological behavior of the unmodified nano-CaCO3 (nanometer calcium carbonate)/dioctyl phthalate (DOP) slurry (DOP-1), the modified nano-CaCO3 WO-12/DOP slurry (DOP-2) and the modified nano-CaCO3 WO-13/DOP slurry (DOP-3) was investigated for evaluating the modification effect of CaCO3. The results show that the rheological behavior of the nano-CaCO3/DOP slurry conforms to the Casson model. Compared with DOP-1 and DOP-3, DOP-2 presents low viscosity, less Cassen yield stress, good stability and higher thixotropy, which indicates that the modified nanometer CaCO3 WO-12 is well compatible with DOP and obtains the best modification effect. It is consistent with the best dispersion of WO-12 in acrylic resin. The rheological behavior of the nano-CaCO3/DOP slurry can be used in evaluating the modification effect of nano-CaCO3.
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