Preparation and Characterisation of Crosslinked Natural Rubber (SMR CV 60) and Epoxidised Natural Rubber (ENR-50) Blends


(1) School of Distance Education, Universiti Sains Malaysia, 11800 Pulau Pinang
(2) Rubber Research Institute of Malaysia, Malaysian Rubber Board, 47000 Sg. Buloh
(3) School of Pharmacy, International Medical University, 57000 Bukit Jalil
(4) Rubber Research Institute of Malaysia, Malaysian Rubber Board, 47000 Sg. Buloh
(5) Universiti Kuala Lumpur, Malaysian Institute of Chemical and Bioengineering Technology, 78000 Alor Gajah, Melaka
(6) School of Distance Education, Universiti Sains Malaysia, 11800 Pulau Pinang
(*) Corresponding Author


In this sudy, the influenceof di(tert-butylperoxyisopropyl)benzene (DTBPIB) on the properties of natural rubber (NR) blend with epoxidized natural rubber (ENR) was determined. Fourier transform infrared spectroscopy with attenuated total refletance analysis and gel content confired crosslinking occurred in the rubber blends in the presence of peroxide DTBPIB percentage. Studies including tensile properties, dynamic mechanical properties, thermogravimetric analysis (TGA) and water absorptivity showed the changes in properties of the crosslinked NR/ENR blends. Tensile properties analysis disclosed the improvements in the modulus at 300% elongation and tensile stength with increasing NR ratios. Dynamic mechanical analysis revealed the blends to be incompatible and immiscible, with ENR showing a more viscous behaviour compared to the polymer blends. Thermal properties improved by blending NR with ENR as the onset temperature of NR/ENR: 50/50 was higher than pure NR by approximately 10oC and ENR by approximately 2oC. Water absorptivity experiment revealed a two-fold reduction in the presence of crosslinking for all blend ratios.


Natural rubber; epoxidized natural rubber; polymer blend; peroxide crosslinking agent

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Abdelmouleh, M. et al. 2007, ‘Short natural-fibrereinforced polyethylene and natural rubber composites: Effct of silane coupling agents and fibres loading’, Composites Science and Technology, vol. 67, no. 7–8, pp. 1627–1639.

Anancharungsuk, W. et al. 2007, ‘Surface modificationof natural rubber filmby UV-induced graft copolymerization with methyl methacrylate’, Journal of Applied Polymer Science, vol. 104, no. 4, pp. 2270–2276.

Arayapranee, W & Rempel, GL 2007, ‘Properties of NR / EPDM blends with or without methyl methacrylate-butadiene-styrene (MBS) as a Compatibilizer’, International Journal of Materials & Structural Reliability, vol. 5, no. 1, pp. 1–12.

Arroyo, M. et al. 2007, ‘Morphology/behaviour relationship of nanocomposites based on natural rubber/epoxidized natural rubber blends’, Composites Science and Technology, vol. 67, no. 7–8, pp. 1330–1339.

Benbettaïeb, N. et al. 2016, ‘Tuning the functional properties of polysaccharide–protein bio-based edible filmsby chemical, enzymatic, and physical cross-linking’, Comprehensive Reviews in Food Science and Food Safety, vol. 15, no. 4, pp. 739–752.

Chandra, R, Singh, S & Gupta, K 1999, ‘Damping studies in fibe-reinforced composites – a review’, Composite Structures, vol. 46, no. 1, pp. 41–51.

De, D. et al. 2013, ‘Reinforcing effec of reclaim rubber on natural rubber/polybutadiene rubber blends’, Materials and Design. Elsevier Ltd, vol. 46, pp. 142–150.

Díaz, A, Katsarava, R & Puiggalí, J 2014, ‘Synthesis, properties and applications of biodegradable polymers derived from diols and dicarboxylic Acids: From Polyesters to poly(ester amide)s’, International Journal of Molecular Sciences, vol. 15, no. 5, pp. 7064–7123.

Guo, B. et al. 2004, ‘Thermoplastic elastomers derived from scrap rubber powder/LLDPE blend with LLDPE-graft-(epoxidized natural rubber) dual compatibilizer’, Macromolecular Materials and Engineering, vol. 289, no. 4, pp. 360–367.

Gurunathan, T, Mohanty, S & Nayak, SK 2015, ‘A review of the recent developments in biocomposites based on natural fibresand their application perspectives’, Composites Part A: Applied Science and Manufacturing. Elsevier Ltd, vol. 77, pp. 1–25.

Imbernon, L & Norvez, S 2016, ‘From landfiling to vitrimer chemistry in rubber life cycle’, European Polymer Journal, Elsevier Ltd, vol. 82, pp. 347–376.

Ismail, H & Nordin, RNA 2002, ‘The comparison properties of recycle rubber powder, carbon black, and calcium carbonate fillednatural rubber compounds’, Polymer-Plastics Technology and Engineering, vol. 41, no. 5, pp. 847–867.

Khimi, SR & Pickering, KL 2015, ‘Comparison of dynamic properties of magnetorheological elastomers with existing antivibration rubbers’, Composites Part B: Engineering, Elsevier Ltd, vol. 83, pp. 175–183.

Kochthongrasamee, T, Prasassarakich, P & Kiatkamjornwong, S 2006, ‘Effects of redox initiator on graft copolymerization of methyl methacrylate onto natural rubber’, Journal of Applied Polymer Science, vol. 101, no. 4, pp. 2587–2601.

Mammadov, MS et al. 2012, ‘Study of the structure and parameters of grid of hydrogenated butadiene nitrile rubber crosslinked with polymer peroxides’, American Journal of Polymer Science, vol. 2, no. 5, pp. 122–128.

Mas Haris, RHM & Raju, G 2014, ‘Preparation and characterization of biopolymers comprising chitosan-grafted-ENR via acid-induced reaction of ENR 50 with chitosan’, Express Polymer Letters, vol. 8, no. 2, pp. 85–94.

Mitragotri, S and Lahann, J 2009, ‘Physical approaches to biomaterial design’, Nature Materials, vol. 8, no. 1, pp. 15–23.

Notario, B, Pinto, J & Rodriguez-Perez, MA 2016 ‘Nanoporous polymeric materials: A new class of materials with enhanced properties’, Progress in Materials Science, Elsevier Ltd, vol. 78–79, pp. 93–139.

Pal, KV & Panwar, JB 2017, ‘Rubber blend nanocomposites’, in Progress in Rubber Nanocomposites, 1st edn, eds S Thomas & H. J. Maria, Woodhead Publishing.

Phinyocheep, P 2014, ‘Chemical modificationof natural rubber (NR) for improved performance’, in Chemistry, Manufacture and Applications of Natural Rubber, Woodhead publishing, pp. 68–118.

Park, CY 2001, ‘Cure characteristics and dynamic mechanical properties of acrylic rubber and epoxidized natural rubber blend’, Journal of Industrial and Engineering Chemistry, vol. 7, no. 4, pp. 212–217.

Pedernera, M & Sarmoria, C 1999, ‘An improved kinetic model for the peroxide initiated modification of polyethylene’, Polymer Engineering, vol. 39, no. 10, pp. 2085–2095.

Piya-Areetham, P, Rempel, GL & Prasassarakich, P 2014, ‘Hydrogenated nanosized polyisoprene as a thermal and ozone stabilizer for natural rubber blends’, Polymer Degradation and Stability, Elsevier Ltd, vol. 102, no. 1, pp. 112–121.

Rajasekar, R. et al. 2009, ‘Development of nitrile butadiene rubber-nanoclay composites with epoxidized natural rubber as compatibilizer’, Materials and Design, vol. 30, no. 9, pp. 3839–3845.

Ramesh, M 2016, ‘Kenaf (Hibiscus cannabinus L.) fibr based bio-materials: A review on processing and properties’, Progress in Materials Science, Elsevier Ltd, vol. 78–79, pp. 1–92.


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