PVC糊树脂颗粒形态对糊粘度的影响

利用扫描电镜，分析双峰分布的聚氯乙烯糊树脂初级粒子和次级粒子颗粒形态对糊粘度的影响，结果表明初级粒子表面的乳化剂层包覆不严或表层粉粒太多，均会导致增塑糊粘度偏高；次级粒子聚结松散，结构脆弱，有较低的糊粘度和触变性；次级粒子聚结紧密，有熔结现象，增塑糊粘度偏高。

Influence of particle form of paste PVC resin on paste viscosity

The influence of the properties of two hump distribution primary particles and secondary particles of paste PVC resin on the paste viscosity has been analyzed by using scanning electronic microscope. The result shows that when the emulsifying agent layer not perfectly covering the primary particles' surface or the primary particles' surface being covered with overmuch powder grain, it will lead to the higher plastisol viscosity. When the secondary particles is loosely accumulated, it will form an frail structure and with lower paste viscosity and thixotropy. But when it is tightly accumulated, the fusion phenomenon will arise, and the plastisol viscosity will be a little higher.