Effect of mass fraction of Pluronic F127 on dynamic rheological behavior of poly (vinyl butyral)/Pluronic F127 system

The effect of mass fraction of Pluronic F127 on dynamic rheological properties of poly(vinyl butyral)(PVB)/Pluronic F127/Polyethylene glycol(PEG 200) system was investigated by dynamic rheometer.The results show that the system has a pseudo-plastic flow characteristic,the complex viscosity,dynamic storage modulus and dynamic loss modulus increase,while the non-Newtonian exponent decreases with the increase of mass fraction of Pluronic F127.The loss factor increases first and then decreases with the increase of shearing frequency,and the loss peak decreases and shifts to low shearing frequency with the increase of mass fraction of Pluronic F127.The relationship between the viscosity and temperature can be described with Arrhenius equation,and the flow activation energy increases a lot with the increase of mass fraction of Pluronic F127.