Abstract:
In this work, polystyrene/waste tires composites were prepared by incorporating of waste tires into polydisperse commercial polystyrene in a melt-mixing method. The rheological characterization of PS and PS/composite have been studied and compared. These properties were studied using ARES-Rheometer under nitrogen atmosphere in parallel plate geometry with diameter 8 mm. The measurements are carried out over a wide range of temperatures ranged from 120°C to 220°C and frequencies from 100 to 0.1 radians per second. The complex modulus (G*) were evaluated and compared with those of unfilled PS. The dynamic mechanical properties and stability at elevated temperatures were found to increase with the addition of waste tires to PS as confirmed by the results.
The results showed that the value of G* at w = 1.0 radian/s is 1.8´104 and 4.4´104 Pa for PS and PS/waste tires, respectively. This difference rises at low frequencies-branch to be the value of G* at w = 0.06 radian/s is 8.8´102 and 7.8´103 Pa for PS and PS/waste tires, respectively. Generally G* increases by the addition of rubber as filler for PS
|