RHEOLOGICAL AND VISCOELASTIC PROPERTIES OF MULTIPHASE ACRYLIC RUBBER/ FLUOROELASTOMER/ POLYACRYLATE BLENDS
Abdul Kader, Anil Kumar Bhowmick
Crescent Engineering College
India
Keywords: rheology, blends, rubber-plastic
Dynamic viscoelastic properties and dynamic mechanical properties of blends of acrylate rubber (ACM), Fluoroelastomer and polyacrylate plastics have been investigated with a rheometer (ARES RDA 111) at a frequency range of 0.1 to 100 rad.s-1. The analysis of thermorheological properties revealed that the dynamic modulii and dynamic viscosity of blends varied with composition of ACM/FKM blend and level and type of polyfunctional acrylates. Blends showed negative deviation of dynamic viscosity additive rule. Higher polyfunctional acrylates induced phase separations and showed temperature dependency. It has been found that the data of the blends did not follow Cole-Cole plot of miscibility and the plot of log G’-log G’’ of blend showed composition dependency. The dynamic mechanical analysis exhibited lower tan delta value for blends containing higher functional acrylates. Stress relaxation measurement showed longer period of relaxation for all blends.