Abstract:
This research presents experimental results of the mechanical properties study of 3 types of plastic mixtures such as HDPE, LDPE and PP. The processes for mixing of plastic are as follows.
Process for preparing plastic mixed in this research, extrusion molding process. Plastic to be mixed together and through injection molding in order to test Mechanical and physical properties of the plastic mixture
Step 1, the mixing of HDPE and LDPE was performed by a given ratio and then the specimens of the mixed plastic were prepared and mechanically tested, respectively. The optimum ratio of the Step 1 was 20%HDPE by 80%LDPE. Step 2, the mixed ratio of optimum ratio of step 1 was mixed with PP by various ratios and found that the optimum ratio was 50%PP because the XRD result showed the hexagonal crystal structure that was higher symmetrical structure. Step 3, the optimum ratio of step 2 was mixed with a nucleating agent by various ratios and found that the optimum ratio of this step was 0.2%wt nucleating agent. The XRD result of the plastic mixture reported that the crystal structure of the mixed plastic of step 3 was also hexagonal type. The addition of nucleating agent also increased a hardness and tensile strength of the mixture reported when compared to the mixture of HDPE+LDPE+PP with no nucleating agent.