Grafting of Oleic Acid on Cyclic Natural Rubber (Resiprene-35) using Dicumyl Peroxide Initiator and Divinylbenzene Compatibilizers for Paint Binder in Polyamide Thermoplastics

In this paper, we reported about modifications of Cyclic Natural Rubber (CNR) with Oleic Acid (OA) and divinylbenzene (DVB) and dicumyl peroxide (DCP). The aim of this research isto improve their compatibility as a paint binder in polyamide thermoplastic substrates. The method of this research is grafting method in order to know grafting process of CNR to generate CNR-g-OA, and its compatibility after being blended with Polyamide (PA). Analysis of CNR-g-OA was carried out by using FTIR and SEM. The results showed that the best compositions ratio of CNR-g-OA are CNR (100 phr), OA (6 phr), DCP (0.5 phr); and DVB (0.5 phr). The FTIR data of CNR-g-OA show that there is a sharp and weak peak at 1700 to 1800 cm-1, indicating that is carbonyl (C=O). It is oleic acid. The SEM data of CNR-g-OA is totally difference compare to CNR-g-OA with polyamide after the addition of DVB. It is caused the grafting was succeed to generate CNR-g-AO and compatible with PA.