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采用熔体流动速率仪考察了温度、载荷以及微胶囊红磷含量对聚丙烯/微胶囊红磷(PP/MRP)复合体系熔体密度和流动性能的影响。结果表明:在实验条件下,PP/MRP复合体系熔体密度随温度升高而降低,随载荷的增大而提高,随MRP含量的增加而呈增大的趋势。PP/MRP复合体系熔体的表观剪切应力与剪切速率基本符合幂律方程,熔体为假塑性流体,并且随着温度的升高,熔体黏度降低,假塑性增强;随着MRP含量的增加,熔体的黏度提高,假塑性增强。PP/MRP复合体系熔体的表观剪切黏度对温度的依赖性符合Arrhenius关系。
The effects of temperature, loading and red phosphorus content of microcapsules on the melt density and flow properties of PP / MRP composites were investigated by melt flow rate meter. The results show that under the experimental conditions, the melt density of PP / MRP composites decreases with increasing temperature, increases with the increase of load, and increases with the increase of MRP content. The apparent shear stress and shear rate of melt of PP / MRP composite system accord with power law equation. The melt is pseudoplastic fluid. With the increase of temperature, the melt viscosity decreases and the pseudoplasticity increases. With the increase of MRP The content increases, the viscosity of the melt increases, pseudoplastic increases. The dependence of apparent shear viscosity on the melt of PP / MRP composites accords with the Arrhenius relation.