THERMAL DEGRADATION KINETIC OF POLYVINYL CHLORIDE

• Main Author: Akbar Riyanda, Ilham
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/55371
• Institution: Institut Teknologi Bandung

Polyvinyl chloride (PVC) is a polymer that has been used in various applications due to low price and wide physical and chemical properties. PVC can be degraded by heat even at a relatively low temperature. Degradation of PVC is a dehydrochlorination process, this process changes PVC structure, colorize the final product, and makes PVC brittle. Thermal stabilizers need to be added to the PVC resin before processed into the final product to avoid thermal degradation. The kinetics parameters of the PVC thermal stabilization reaction of a stabilizer are important in evaluating the performance of the stabilizer and PVC formulation as well in PVC processing and also in recycling of PVC products. The main objective of this research is to determine the kinetic parameters in the form of activation energy and Arhennius constant as well as the mechanism of PVC thermal stabilization reaction. The primary data that is used is in the form of TGA data of PVC using organic metal as a stabilizer at 3 heating rates variations (10 ?/min, 20 ?/min, dan 30 ?/min) obtained from the literature. The TGA data proved that the degradation occurs in two stages: dehydrochlorination (first stage) starting at 242-273ºC and decomposition (second stage) starting at 530-571ºC. The peaks of derivative thermogravimetry curves occurs at 365-405ºC and 551-588ºC for the first and second stages, respectively. Data analysis showed that the activation energy is 111 kJ/mol and the Arhennius constant is 6,1 x 108 min-1. The degradation reaction follows a second order of reaction kinetics. The kinetic parameter values obtained are in the range of the values reported in the literatures.