การหาอุณหภูมิที่เหมาะสมที่สุดของการรีดคอมพาวนด์หน้ายางและวัลคาไนเซชัน

• Main Author: พรทิพา ประสงค์เงิน
• Other Authors: ประเสริฐ เรียบร้อยเจริญ
• Format: Theses and Dissertations
• Language: Thai
• Published: จุฬาลงกรณ์มหาวิทยาลัย 2020
• Online Access: https://digiverse.chula.ac.th/Info/item/dc:33933
• Institution: Chulalongkorn University

The primary process of retread tire manufacturing is the curing process. It is the key process that affects tire productivity performance. The propose of this study to determine temperature optimal for tread compound extrusion and vulcanization, including to examine properties of rubber vulcanized via different temperature at 140, 150, and 160 ˚C. Green tire storage time for 1, 5, and 10 days before cured to find appropriate green tire aging limit. The viscosity, cure characteristic, %gel content and crosslink density were analyzed. The mechanical properties were inspected by tensile testing, elongation at break and modulus. The results indicated that scorch time and curing time slightly decrease with increasing the cure temperature and compound storage time.Gel fraction occurs in the rubber molecule after compound stored. The tensile value is a direct variation with curing temperature. Crosslink density decreases with increasing extrusion temperature and cure temperature showed a quite same trend for tensile strength and modulus at 300%. However, extrusion and curing temperature at 50 ˚C and 150 ˚C respectively, are optimized temperatures because too high cure temperature affects larger steam energy for heating into mold and bladder damaged faster. That condition provides shorter curing time and still have excellent mechanical properties. These findings are important for improving tire productivity to achieve customer demand.