Physical Thermal Effect Test for Treatment of Polystyrene Plastic Waste

Abstract

Two groups of plastic waste manufactured from polystyrene (PS) were used to manufacture samples, the first group of polystyrene (Ps) is not subject to recycling, while the second group was made of polystyrene (Ps), which was subject to a recycling process using the sulfonation method and by (19.3%). The first group was called the saturated polystyrene group, while the second group was called unsaturated polystyrene, Manufactured samples underwent surface hardness and bending durability checks before and after exposure to a thermophysical effect at temperatures ((T = 60, 80 and 100 C0)). The results indicated that the polystyrene cannot maintain its surface hardness in case it is exposed to a thermophysical effect. The amount of decrease in the value of the surface hardness takes the exponential form instead of the linear shape, the extent that the value of the surface hardness is fixed with the increase in the time period of exposure to the thermophysical effect. Even if the change in the effect value was relatively few. And that there is a critical time period in which the bending resistance of the polystyrene material reaches the maximum value, after which the ability of the material to resist the bending decreases with an increase in the time period of exposure to the thermophysical effect. The effects associated with the bending process (tension, compression, shear) collapse after exposure to the thermophysical effect during a critical time period due to the loss of the continuity property in the body of the polystyrene, and finally the material loses its ability to resist the bending, and this characteristic depends on the quality of the polystyrene .