Kajian perbandingan di antara kaedah proses penyemperitan dan proses pengacuan suntikan ke atas struktur sel PP/PS/PMMA campuran pertigaan busar polimer

Abstract

The effect of blending method on the blend morphology as well as cellular structure of Polypropylene (PP)/Polystyrene (PS)/ Polymethyl methacrylate (PMMA) ternary polymer blend was investigated. The blending method highly influenced the dispersion and size of dispersed domain where the injection molding method was successfully reduced the size of dispersed domain from 10 μm by extrusion further down to 1 μm in average diameter. The batch pressure quenched foaming of the ternary blend prepared by extrusion and injection molding with supercritical carbon dioxide (CO2) was conducted in the temperature range of 130 to 160°C to observe the controllability of bubble location and size in two different ternary blend systems. The experimental results showed that method of sample preparation is one of the important factors in controlling the cellular structure of ternary blend foam besides interfacial tension, foaming temperature, and viscoelasticity.