The Effect of Filler Loading on Curing and Mechanical Properties of Natural Rubber/recycled Rubber Powder Blends

• Published in: International journal of polymeric materials Vol. 54; no. 1; pp. 9 - 20
• Main Authors: Ismail, H., Nordin, R., Noor, A. M.
• Format: Journal Article
• Language: English
• Published: Philadelphia, PA Taylor & Francis Group 01-01-2005; Taylor & Francis
• Subjects: Applied sciences; carbon black; cure characteristics; Exact sciences and technology; mechanical properties; Polymer industry, paints, wood; recycle rubber powder; silica; Technology of polymers; Waste treatment; Scrap rubber; Polymer blends; Carbon black; Elastomer; Mechanical properties; Natural rubber; Dispersion reinforced material; Hardness; Experimental study; Silica; Property formulation relationship; Tensile strength; Vulcanization; Vulcanizate; Waste reuse; recycle rubber powder; Recycled material; cure characteristics; Tear strength
• ISSN: 0091-4037; 1563-535X
• DOI: 10.1080/00914030390224256

Curing characteristics and mechanical properties of carbon black- and silica-filled natural rubber (NR)/recycled rubber powder (RRP) blends were studied. Results indicate that the minimum torque and maximum torque increase with increasing filler loading in the compounds, whereas scorch time shows a decreasing trend. Cure time of carbon black-filled NR/RRP blends decreases with increasing filler loading whereas silca-filled NR/RRP blends show an opposite trend. Incorporation of filler loading has improved the tensile modulus, hardness, tear strength, and resistances toward swelling. However, elongation at break and resilience exhibit a different trend. For tensile strength, optimum values were obtained at 15 phr of both fillers. Overall results show that carbon black (N550) is more suitable to be used as a filler in natural rubber/recycle rubber powder blends compared to silica (Vulcasil S).