The Influences of Cure Characteristics and Physical Properties of Recycled Nitrile Glove Filled Epoxidized Natural Rubber Compounds (NBRr/ENR25)

Abstract:

The effects on curing characteristics and physical propertiesof recycled nitrile glove (NBRr) filled epoxidized natural rubbers (ENR25) were examined. Two different size ranges of NBRr particles, i.e., S₁ (250μm-500μm) and S₂ (2cm-5cm) were used in this study. The NBRr/ENR25 compounds with five different compositions of NBRr (5, 15, 25, 35 and 50 phr) were prepared using a two roll-mill at room temperature. The result of cure characterization show that scorch time, t₂ and cure time t₉₀ of the NBRr/ENR25decreased with the increased of NBRr content due to the existence of crosslinked precursors and unreacted curativein the recycled rubber.NBRr/ENR25 compounds with fine size, S₁ of NBRr particles exhibit lower minimum torque (M_L) compared with the coarse size, S₂ which resulted in more efficient processing. The maximum torque (M_H) of all NBRr/ENR25 compounds show the increasing trend with increased NBRr content probably due to the good interactions in NBRr/ENR25 compounds. For physical properties, NBRr/ENR25 compounds with fine size, S₁ of NBRr particles exhibited the higher hardness and crosslinking density at all compound ratios. The results overall indicated that the NBRr/ENR25 with fine size, S₁ of NBRr particles show better cure characteristics and physical properties (crosslink density and hardness test) compared to coarse size, S₂ of NBRr particles.

• Periodical: Applied Mechanics and Materials (Volumes 754-755)
• Pages: 125-129
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.754-755.125
• Online since: April 2015
• Authors: A.A. Afiratul, N.Z. Noriman, S.T. Sam, Ismail Hanafi, MOHD FIRDAUS OMAR
• Keywords: Crosslink Density, Curing Characteristics, ENR25, Hardness, Recycled Nitrile Glove (NBRr)

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