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本文测定了针状磁性氧化铁(γ-Fe_2O_3)悬浮体的粘度,发现两种悬浮体的粘度与浓度之间的关系遵从 Mooney公式,求得的特性粘度[η]都随剪切速率的增大而减小。对[η]实验值进行的理论分析表明,γ-Fe_2O_3在分散介质中是以絮凝态存在的。在极稀的悬浮体中,假设絮凝体基本为球形的条件下,用简便的方法推导出[η]=2.5/φpf.φpf 的计算值表明,悬浮体(Ⅰ)中(以分子量36000的共聚物为分散介质)的絮凝体体积较小,对分散性更为有利.
In this paper, the viscosity of the needle-shaped magnetic iron oxide (γ-Fe_2O_3) suspension was measured. It was found that the relationship between the viscosity and the concentration of the two suspensions obeys the Mooney formula and the intrinsic viscosity [η] Big and small. The theoretical analysis of [η] experimental data shows that γ-Fe 2 O 3 exists in the flocculation state in the dispersion medium. In extremely dilute suspensions, the calculation of [η] = 2.5 / φpf.φpf, assuming a substantially spherical shape of the flocs, was carried out by a simple method which showed that in the suspension (I) (copolymerized with a molecular weight of 36,000 As the dispersion medium) flocs smaller, more favorable dispersion.