UJI EFEKTIVITAS STABILISER TERMAL PVC BERBASIS SAWIT : DEHYDROCHLORINATION TEST

• Main Author: Kusuma, Angga
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/65986
• Institution: Institut Teknologi Bandung

PVC (polyvinyl chloride) is a plastic polymer resin that is widely produced and used around the world. However, there is a significant issue, which occurs during the manufacturing process. Due to its poor thermal stability, PVC is easily degraded by heat. Defects in the form of tertiary chlorine atoms from the PVC manufacturing process are to blame for the poor thermal stability. To address this issue of thermal stability, a thermal stabilizer must be added to PVC resin to avoid thermal degradation. Stabilizer metal alloys or metal soaps, especially Zn-Ca alloys, are a popular form of thermal stabilizer. This stabilizer is used because it is both inexpensive and non-toxic. However, the efficiency of this metal mixture is still considered ineffective because it produces a byproduct, ZnCl2, which can speed up the rate of thermal degradation. As a result, another additive, in the form of a co-stab, is needed to prevent degradation caused by these byproducts. Polyols are one of the most common types of co-stab. Polyol compounds are used as co-stabs because of the ability of the hydroxyl group to bind the ligand complex with ZnCl2 and also react with HCl. Pentaerythritol is a polyol compound that is widely used. There are, however, a number of other polyol compounds that have the potential to be useful as co-stabs and are less expensive than pentaerythritol. As a result, a research was performed out on the efficiency of the polyol co-stab type which is ideal for oil-based mixed metal stabilizers. Based on the test, the initial time and the average stability time from longest to fastest were sorbitol with a time of 46.520 minutes and 80.665 minutes; mannitol with a time of 41.750 minutes and 79.080 minutes; silitol with a time of 40,500 minutes and 76,415 minutes; pentaerythritol with a time of 32.665 minutes and 57.835 minutes; sucrose with times of 20,665 minutes and 46,000 minutes; and resin without costabiliser with a time of 17.075 minutes and 32.415 minutes. Sorbitol, mannitol, and xylitol were shown to have better induction and decay times than pentaerythritol