engleski

Processing and Dynamic Mechanical Properties of PS- HI/SEBS Blends

Thermoplastic elastomers have been succesfuly used as a impact modifiers for thermoplastics. Dynamic mechanical properties and phase transitions are very important for their application. In this paper, the copolymers high- impact polystyrene, PS-HI, styrene-ethylene/buthylene-styrene bloc copolymer, SEBS ; and their blends were investigated. Rheological behavour of those samples during processing was followed by measuring the torque vs. time in the extruder Haake Record 90. The investigations were done by DMA analysis. The primary viscoelastic functions, the storage modulus, E', the loss modulus, E", and loss tangent, tanges delta, were determined in the temperature range -150 oC to 160 oC. The correlation of the processing parameters and primary viscoelastic functions with content of the hard, PS, phase were discussed.

processing ; dynamic mechanical properties ; high-impact polystyrene ; styrene-ethylene/buthylene-styrene block copolymer ; PS-HI(SEBS) blends

Glavni autori: Rek, Vesna ; Holjevac Grgurić, Tamara.