Polystyrene + Styrene-Butadiene Blends: Mechanical and Morphological Properties
Keywords:polymer blends, polystyrene, styrene-butadiene, Izod impact, scanning electron microscopy.
Blends of 3, 5 and 10 weight % of styrene-butadiene rubber (SBR) embedded in a rigid polystyrene matrix were first mixed in a co-rotating twin screw extruder and then injection molded. The blends were characterized in terms of: tensile strength, flexural strength and Izod impact and morphology by scanning electron microscopy (SEM). The addition of SBRs improves impact strength but lowers tensile and flexural modulae. Homogeneous distribution of the reinforcing phase enhances the impact strength. Best results are obtained for linear SBRs.
The copyrights for articles in this journal are retained by the author(s), with first publication rights granted to the journal. By virtue of their appearance in this open-access journal, articles are free to use with proper attribution in educational and other non-commercial settings.