Abstract
Abstract
Tube collar is a part of quad cane type patient sticks. Its function is to adjust the height of the stick when used. The materials widely used to make tube collars are plastic. This study aims to study the mechanical properties of tube collars made from natural rubber composite materials with ethylene propylene diene monomers. Natural rubber and ethylene propylene diene monomers vary in ratios (70: 30; 80: 20; 90: 10; and 100: 0) phr. The activator, coactivator, softener, filler, accelerator, antioxidant and vulcanizing agent are conditioned. The experiments were carried out through the process of mastication, compounding and vulcanization. Vulcanization is carried out at 135 °C for 8 minutes. Curing characteristic test results with a rheometer at a temperature of 150 °C showed ΔS maximum of 9.70 kg/cm, maturation time (t90) 4.59 min, and scorch time (ts2) 0.02 min. The results of testing the mechanical properties of vulcanized rubber showed that the difference in the ratio of natural rubber with ethylene propylene diene monomer affects the mechanical properties of vulcanized rubber.