Analysis of the Morphology and Mechanical Properties of Polymer Composite Materials (PCM) from Silicon Dioxide (SiO<sub>2</sub>) and Multiwalled Carbon Nanotubes (MWNTs) Reinforced Volcanic Stone

Abstract

The formation of Polymer Composite Materials (PCM) based on mineral stones reinforced with Silicon Dioxide (SiO2) and Carbon Nanotubes (CNTs) using the Squeze Casting Method was carried out to obtain an increase in surface hardness, while the inner side of the elongation remained high. Based on SEM-EDX testing, it is known that the crystalline form of igneous rock and SiO2 is tapered, with large and small variations, CNTs with fine crystalline structures, which can bind well to specimen formation. The results of bending and hardness tests showed that dimensional variations, the aggregate ratio with resin and the addition of CNT and SiO2 reinforcement had the highest hardness 89.55 HD (Hardness of durometer), mixing of silica sand – vulkanic sand had the highest bending strength of 18.7 MPa, the lowest is a mixture of granite-sand of Merapi at 11.63 MPa. The variation of silica sand – volcanic sand has the highest bending strength, the lowest is the mixing of granite-volcanic sand.