Study on Energy Ratio Model for Phase Morphology of Immiscible Polymer Blends

Abstract

The formulas of polymer melt velocity, shearing rate, and shearing stress in simple shearing flow under the vibration force field were established. Based on the concept of an energy ratio model, the rate of energy dissipation and the energy ratio for blending systems are expressed theoretically. The calculated and analytical results of both the dynamic flow field and energy ratio show that with the increasing of vibration strength the fluctuating shearing force field exerted on polymer melt and the negative pressure diffusion behavior of instantaneous impulse strengthen. The energy consumption for phase inversion of immiscible polymer blends under the vibration force field is less than that of steady state. The parameter controllability of the vibration force field provides a more effective method for realizing phase inversion of immiscible polymer blends.

Keywords:

• Dynamic flow field
• Energy ratio model
• Immiscible polymer blends
• Phase morphology

ACKNOWLEDGMENT

The authors thank the National Natural Science Foundation of China (10472034, 10590351), and the Guangdong Natural Science Foundation of China (04011763).