Influence of Accelerator/Sulfur Ratio on Mechanical Properties and Thermal Resistance of Natural Rubber Containing Hybrid Fillers

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This research investigated the effect of accelerator/sulfur (ACC/S) ratio on mechanical properties and thermal resistance of natural rubber composites containing hybrid fillers. Two hybrid systems of 10/60 carbon black/calcium carbonate (CB/CC) and silica/calcium carbonate (SC/CC) in NR composites were focused and the different ACC/S ratios were 0.40, 0.56, 0.64 and 0.88. The results indicated that the crosslink density, hardness and tear strength of NR vulcanizates increased with increasing ACC/S ratio, whereas compression set decreased. However, tensile strength increased with increasing ACC/S ratio up to 0.64 and then it decreased when the ACC/S ratio is further increased. In addition, the vulcanizates with high ACC/S ratio, which mainly contained monosulfidic and disulfidic linkages, exhibited a greater thermal ageing resistance than that with low ACC/S ratio which contained polysulfidic linkage. Comparing in two hybrid filler systems, the reinforcement performance of CB/CC hybrid-filled is significantly higher for all ACC/S ratios investigated.

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300-304

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July 2017

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© 2017 Trans Tech Publications Ltd. All Rights Reserved

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[1] A. S. Aprem, K. Joseph, T. Mathew, V. Altstaedt, S Thomas, Studies on accelerated sulphur vulcanization of natural rubber using 1-phenyl-2, 4-dithiobiuret/tertiary butyl benzothiazole sulphenamide, Eur. Polym. J. 39 (2003) 1451-1460.

DOI: 10.1016/s0014-3057(02)00382-8

Google Scholar

[2] R. P. Quirk, Overview of curing and crosslinking of elastomers. Prog. Rubber Plast. Technol. 4 (1988) 31-45.

Google Scholar

[3] H. J. Graf, Y. Feng, EPDM compounds for dynamic applications, US 6693145 B2, Feb. 17, (2004).

Google Scholar

[4] S. Prasertsri, N. Rattanasom, Fumed and precipitated silica reinforced natural rubber composites prepared from latex system: Mechanical and dynamic properties, Polym. Test. 31 (2012) 593-605.

DOI: 10.1016/j.polymertesting.2012.03.003

Google Scholar

[5] P. J. Flory, N. Rabjohn, M. C. Shaffer, Dependence of tensile strength of vulcanized rubber on degree of cross-linking. J. Polym. Sci. 4 (1949) 435-455.

DOI: 10.1002/pol.1949.120040402

Google Scholar

[6] R. Stephen, S. Jose, K. Joseph, S. Thomas, Z. Oommen, Thermal stability and ageing properties of sulphur and gamma radiation vulcanized natural rubber (NR) and carboxylated styrene butadiene rubber (XSBR) latices and their blends, Polym. Degrad. Stab. 91 (2006).

DOI: 10.1016/j.polymdegradstab.2005.12.001

Google Scholar