MECH ANICAL PROPERTIES OF PP/PC/SEBS TERNARY BLENDS

Polypropylene/Polycarbonate (PP/PC), Polypropylene/Poly(styrene-b-(ethylene-cobutylene)- b-styrene) (PP/SEBS) binary blends and PP/PC/SEBS ternary blend were produced via melt blending in a co-rotating twin-screw extruder. The influences of the PC, SEBS and core-shell particles on tensile and impact behaviours of the blends were investigated. A slight increase of the impact strength was observed in PP/PC binary blend due to addition of PC particles. While the fracture behaviour of PP/SEBS and PP/PC/SEBS blends completely changed and exceptionally high impactstrength observed. The PP/SEBS and PP/PC/SEBS blends exhibited inferior low-strain tensile properties (modulus, yield stress) than the matrix PP, but superior ultimate tensile properties while the PP/PC sample exhibited higher modulus and inferior ultimate tensile properties than the PP sample.Comparing experimental values whit the values obtained based on Kerner equation for the PP/PC/SEBS ternary blend confirmed that core-shell morphology (PC particles as a core and the SEBS phase as a shell) and individual SEBS particles formed in this blend.

کلیدواژه ها:

Polypropylene ، Mechanical properties ، Polymer blends ، Core-Shell Particles