Abstract
Cure characteristics, Mooney viscosity and physico-mechanical properties of natural rubber (NR) containing CTAB modified kaolin have been studied. NR mix containing 6 phr (parts per hundred part rubber) of CTAB modified kaolin showed significant increases in cure rate and state of cure as compared to gum NR compound and a mix containing the same amount of unmodified kaolin. Lower Mooney viscosity of the NR mix containing CTAB modified kaolin suggested improved processability. Reinforcing effect of CTAB modified kaolin in NR was evident from higher chemical crosslink density index, tensile modulus, hardness, tensile strength and tear strength. Besides, the NR vulcanizate containing 6 phr of CTAB modified kaolin showed lower abrasion loss and heat build-up which could be beneficial for applications such as tire treads.
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Acknowledgements
Authors would like to thank Dr. A. Ajayaghosh, Director, NIIST-CSIR, Thiruvananthapuram for providing the necessary facilities for carrying out this work. Our sincere thanks are also due to Dr. E. BhojeGowd, Senior Scientist, NIIST for providing XRD facility, Mr. Amal Raj, NIISTfor SAXS measurement, Ms. Remya, NIIST for TGA, Dr. S. Rajeev, Vikram Sarabhai Space Centre (VSSC), Thiruvananthapuram for dynamic mechanical analysis and to the Rubber Research Institute of India (RRII), Kottayam and SreeChitraThirunalInstitute of Medical Sciences (SCTIMST), Thiruvananthapuram for carrying out a part of the work. Financial assistance obtained from CSIR, New Delhi (under Project No. CSC-0135) and DST, New Delhi are also gratefully acknowledged.
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Peter, R., Sreelekshmi, R.V. & Menon, A.R.R. Cetyltrimethyl Ammonium Bromide Modified Kaolin as a Reinforcing Filler for Natural Rubber. J Polym Environ 26, 39–47 (2018). https://doi.org/10.1007/s10924-016-0915-z
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DOI: https://doi.org/10.1007/s10924-016-0915-z