Rheological Studies of NR/PVP Blends and Impact of Concentration and Speed Range on Their Properties

Natural Rubber Latex (NRL) and Polyvinyl pyrolidone (PVP) blends with different PVP concentrations were prepared and rheological properties of NRL/PVP blends have been investigated at different speed range. Significant changes of behaviors are found with increased PVP in blends. Yield stress increases with increased PVP in blends. The increasing trend of stress increases with PVP content in blend. Shear stress and yield stress increase with increased speed range. Change of nature of rheogram of NRL with PVP indicates the interaction between NRL and PVP. Increasing speed range, the decreasing trend of viscosity indicates the orderliness of molecular segments in blends.