The phase morphology and properties of two component systems made up of polymethyl methacrylate (PMM) and methyl methacrylate-butadiene-styrene terpolymer☆

Abstract Stereometric metallography of ultra-thin sections was carried out with the aid of electron photomicrography to establish the phase morphology (steric composition and dispersity) of PMM blends with a methyl methacrylate-butadiene-styrene terpolymer (BMST) present as 10 and 20% w/w. Two sample preparation methods were used, namely a methyl methacrylate polymerization in the blend with MBST, and pressure moulding of milled blocks. The dispersities (absolute and relative specific surfaces) strongly depended on the method of preparation. A connection was found between dispersity and the dynamo-mechanical, the impact properties, the densities of the mixtures, with the elongation curves over a wide temperature range.