Performance of binary accelarator system on natural rubber compound

Ihda Novia Indrajati, Indiah Ratna Dewi


Accelerator system provides different response onto the rubber compound, and in turn influences its final properties. Accelerators, such as 2,2'-Dithiobis (benzothiazole) (MBTS), N-Cyclohexylbenzothiazole-2-Sulfenamide (CBS) and diphenyl guanidine (DPG), has been selected for the study. Response of paired accelerator, MBTS/DPG and CBS/DPG in various ratio, on natural rubber (NR) compound was evaluated. Rheological properties and cure characteristics of the compounds were analyzed using Mooney viscometer and moving die rheometer (MDR) typically. Results findings showed that incorporation of DPG into the system has increased the viscosity of the compound and effected the molecular weight during the process. Further, the addition of DPG also shortened the induction period by reducing the scorch time (ts2) and decreasing the cure time (t90). Binary paired accelerator resulted in poor flow characteristic as a result of strong domination of elastic element. In general, the CBS-based system provided more balance characteristic than those of MBTS-based.

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Ahmadi, M., & Shojaei, A. (2013). Cure kinetic and network structure of NR/SBR composites reinforced by multiwalled carbon nanotube and carbon blacks. Thermochimica Acta, 566, 238-248.

Ahsan, Q., Mohamad, N., & Soh, T. C. (2015). Effects of accelerators on the cure characteristics and mechanical properties of natural rubber compounds. International Journal of Automotive and Mechanical Engineering, 12, 2954-2966.

Alam, M. N., Mandal, S. K., Roy, K., & Debnath, S. C. (2014). Synergism of novel thiuram disulfide and dibenzothiazyl disulfide in the vulcanization of natural rubber: Curing, mechanical and aging resistance properties. International Journal of Industrial Chemistry, 5(1), 1-11.

Anandhan, M., Kaisare, N. S., Kannan, K., & Varkey, B. (2012). Population balance model for vulcanization of natural rubber with delayed-action accelerator and prevulcanization inhibitor. Rubber Chemistry and Technology, 85(2), 219–243.

Boonkerd, K., Deeprasertkul, C., & Boonsomwong, K. (2016). Effect of sulfur to accelerator ratio on crosslink structure, reversion, and strength in natural rubber. Rubber Chemistry and Technology, 89(3), 450-464.

Formela, K., Wąsowicz, D., Formela, M., Hejna, A., & Haponiuk, J. (2015). Curing characteristics, mechanical and thermal properties of reclaimed ground tire rubber cured with various vulcanizing systems. Iranian Polymer Journal, 24(4), 289-297.

Ghosh, P., Katare, S., Patkar, P., Caruthers, J. M., Venkatasubramanian, V., & Walker, K. A. (2003). Sulfur vulcanization of natural rubber for benzothiazole accelerated formulations: From reaction mechanisms to a rational kinetic model. Rubber Chemistry and Technology, 76(3), 592-693.

Heideman, G., Datta, R. N., Noordermeer, J. W. M., & van Baarle, B. (2004). Activators in accelerated sulfur vulcanization. Rubber Chemistry and Technology, 77(3), 512-541.

Indrajati, I. N., & Dewi, I. R. (2017). Performance of maleated castor oil based plasticizer on rubber: rheology and curing characteristic studies. IOP Conference Series: Materials Science and Engineering, 223, 12001.

Indrajati, I. N., & Sholeh, M. (2014). Pengaruh rasio MBTS/ZDEC pada campuran karet alam dan etilen propilen diena yang dibuat dengan teknik kontrol migrasi curatives. Majalah Kulit, Karet, dan Plastik, 30(1), 43-52.

Intiya, W., Thepsuwan, U., Sirisinha, C., & Sae-Oui, P. (2017). Possible use of sludge ash as filler in natural rubber. Journal of Material Cycles and Waste Management, 19(2), 774-781.

Joseph, A. M., George, B., Madhusoodanan, K. N., & Alex, R. (2015). Current status of sulphur vulcanization and devulcanization chemistry: Process of vulcanization. Rubber Science, 28(1), 82-119.

Kaewsakul, W., Sahakaro, K., Dierkes, W. K., & Noordermeer, J. W. M. (2013). Optimization of rubber formulation for silica-reinforced natural rubber compounds. Rubber Chemistry and Technology, 86(2), 313–329.

Kamoun, M., Nassour, A., & Michael, N. (2009). The effect of novel binary accelerator system on properties of vulcanized natural rubber. Advances in Materials Science and Engineering.

Khimi, S. R., & Pickering, K. L. (2014). A new method to predict optimum cure time of rubber compound using dynamic mechanical analysis. Journal of Applied Polymer Science, 131(6).

Kondo, H. (2014). Evaluation of rubber processing in unvulcanised rubber. International Polymer Science and Technology, 41(7), 51-58.

Le, H. H., Ilisch, S., Hamann, E., Keller, M., & Radusch, H. J. (2011). Effect of curing additives on the dispersion kinetics of carbon black in rubber compounds. Rubber Chemistry and Technology, 84(3), 415-424.

Maciejewska, M., Walkiewicz, F., & Zaborski, M. (2013). Novel ionic liquids as accelerators for the sulfur vulcanization of butadiene-styrene elastomer composites. Industrial and Engineering Chemistry Research, 52(25), 8410-8415.

Malac, J. (2011). Mooney viscosity, Mooney elasticity and processability of raw natural rubber. Journal of Material Science and Engineering with Advanced Technology, 3(1), 67–87.

Marykutty, C. V., Mathew, G., Mathew, E. J., & Thomas, S. (2003). Studies on novel binary accelerator system in sulfur vulcanization of natural rubber. Journal of Applied Polymer Science, 90(12), 3173-3182.

Ohnuki, T. (2015). The vulcanizing system of diene rubber. International Polymer Science and Technology, 42(8), 39-46.

Peter, R., Sreelekshmi, R. V., & Menon, A. R. R. (2016). Cetyltrimethyl ammonium bromide modified kaolin as a reinforcing filler for natural rubber. Journal of Polymers and the Environment, 1-9.

Rabiei, S., & Shojaei, A. (2016). Vulcanization kinetics and reversion behavior of natural rubber/styrene-butadiene rubber blend filled with nanodiamond – The role of sulfur curing system. European Polymer Journal, 81, 98-113.

Zheleva, D. (2013). An attempt for correlation between Mooney viscosity and rheological properties of filled rubber compounds. Journal of Chemical Technology and Metallurgy, 48(3), 241-246.



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