A METHOD FOR IMPLEMENTING THE MECHANICAL PROPERTIES OF MALEIC ANHYDRIDE DERIVATE GRAFTED NATURAL RUBBER-CLAY NANOCOMPOSITE VULCANIZATE PREPARED FROM ACID FREE CO-COAGULATION TECHNIQUE
S. G. J Perera1*, S. M. Egodage2 and S. Walpalage3
1 Institute of Technology, University of Moratuwa, Sri Lanka, 2,3 Department of Chemical and Process Engineering University of Moratuwa
Session: Technical Session C
Abstract
Two types of nanocomposite vulcanizates, Nanocomposite A and Nanocomposite B, were successfully prepared from maleic anhydride derivative-grafted natural rubber latex (NRL). Bis(triethoxysilylpropyl) tetrasulfide (TESPT) grafted organoclay (OMMT-S) was incorporated at loadings of 2 and 5 phr. The coagulation of the rubber-clay mixture in an acid-free environment was expedited by employing two gelling agents: sodium dodecyl sulfate (NADS) and cetyl trimethyl ammonium bromide (CTAB). In comparison to the vulcanized control sample of un-modified un-filled NR prepared by the conventional method (Control-A), the addition of 5 phr OMMT-S to vulcanized grafted NR (B-5) resulted in a notable improvement in mechanical properties. Specifically, B-5 demonstrated an increase in tensile strength by 167%, a rise in modulus at 300% by 56%, and elongation at break enhancement by 36%.
Keywords: clay nanocomposite, natural rubber, NR grafting, rubber-filler interactions
DOI: 10.64752/PRRN4938