IMPACT ANALYSIS ON COMPOSITE OF PET

Abstract

Analysis has been conducted on thermoplastic Polyester Polyethylene Teraphthalate (PET) with present of two types of fillers and Thermoplastic Elastomer (TPE). PET has shown unique and various characteristics when added with two types of additives or fillers which are Calcium Carbonate (CaCO3) and Wollastonite (CaSiO3) with or without existence of 10% weight of TPE. These fillers were added to PET at 5%, 10%, 15%, 20%, 25% and 30% with respect to weight of PET. PET has the low impact strength among the other polymers. Therefore this research has been carried out to PET with adding some filler to increase the impact strength. In order to produce the specimens, the fillers need to be sieved with size 45μm using sieve shaker machine. The specimens prepared according to 5%, 10%, 15%, 20%, 25%, and 30% weight of fillers using injection molding machine. Charpy impact testing has been carried out to analysis the energy absorbed by the specimen before fractured. Based on the results, the percentage of additives that can increased the impact strength are 90% PET + 10% CaCO3, 95%PET + 5% CaSiO3, 60% PET + 30% CaCO3 + 10% TPE, and 60% PET + 30% CaSiO3 + 10% TPE. However, highest impact strength is given by 70% PET + 20% CaCO3 + 10% TPE and 65% PET + 25% CaCO3 + 10% TPE with value 0.407 J/mm2. In wrapping up, impact strength given by CaSiO3 is higher than CaCO3 without the existence of 10% TPE. 10% TPE is playing an importance role in increasing the impact strength of PET with CaCO3. Naturally PET is non toxic, so it can be use as food wrapper, and bottles. Besides that, PET+20% CaCO3+10%TPE, PET+25%CaCO3+10%TPE, PET+20% CaSiO3, and PET+30% CaSiO3+10%TPE also increased the impact strength of PET, so it can be use to produce telephone casing, mouse, key board replace with ABS if it would reduce the manufacturing cost.