EFFECT OF THERMAL AGING ON HARDNESS AND TENSILE FRACTURE OF NATURAL RUBBER COMPOSITES BASED ON SILICA AND MODIFIED/RAW BENTONITE FILLER SYSTEM

Authors

  • Mark Rigel R. Ali Polymer Research Laboratory, Department of Chemical Engineering, University of the Philippines Diliman, Quezon City, 1101 Philippines Author
  • Bryan B. Pajarito Polymer Research Laboratory, Department of Chemical Engineering, University of the Philippines Diliman, Quezon City, 1101 Philippines Author

Keywords:

Natural rubber, Thermal aging, Bentonite, Silica, Mixture filler

Abstract

Natural rubber (NR) composites filled with silica, modified bentonite (M-BNT), and raw bentonite (BNT) at varied amounts were prepared and tested for hardness and tensile fracture after thermal aging at 70 and 100 °C for 336 h. At 70 °C, the hardness of NR composites increased due to postcuring effect up to 336 h, while initial postcure for 48 h followed by degradation was observed at 100 °C. Measurements of tensile strength and elongation at break indicate a silica/M-BNT mixture filler would give good thermal resistance to NR composites. On the other hand, contour maps showed poor thermal resistance of NR composites filled with BNT. Attenuated total reflectance (ATR) – Fourier transform infrared (FTIR) spectra of aged NR composites show oxidation and chain scission during thermal aging.

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Published

20-01-2026

Issue

Vol. 26 No. 1 (2018): Solid State Science and Technology

Section

Articles

License

Copyright (c) 2018 Solid State Science and Technology

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This work is licensed under a Creative Commons Attribution 4.0 International License.