The effect of gypsum loadings on the curing characteristics and physicomechanical properties of natural rubber vulcanisates
Subject Areas : International Journal of Bio-Inorganic Hybrid Nanomaterials
Keywords: Mechanical Properties, gypsum, Cure characteristics, Natural rubber, Vulcanisation,
Abstract :
The effect of gypsum loading on curing characteristics and physico-mechanical propertiesof natural rubber vulcanisates were investigated over a range of filler loadings from 0 to 40 phr. Changeswith minimum torque (ML), maximum torque (MH), scorch time (ts2), 90% cure time (tc90) and curing rateindex (CRI), tensile strength, young modulus at 300% elongation (M300), elongation at break, hardnessand rebound resilience with the filler loadings were investigated. The results revealed that the valuesof both the minimum torque and the maximum torque increased with the filler loadings. However, thescorch time was found to decrease and 90% cure time was almost unchanged with increasing fillerloadings. The tensile moduli at 300% elongation and hardness increased, whereas, tensile strength,elongation at break and rebound resilience dropped with the addition of filler loadings.