Preparation and molecular weight controlled of liquid natural rubber using Mastication

Natural rubber (NR) can be easily depolymerized because that contain unsaturated component (double bond). Mastication is breaking the rubber molecular chains through mechanical action and thermal in two roll mill. This attention is preparation depolymerized natural rubber, using mastication method with temperature-controlled two roll mill. The effect of temperature and time of mastication on degree of depolymerization were studied and characterized by Gel Permeation Chromatography (GPC). It was found increasing temperature and time of mastication to the resulting decreased average molecular weight of NR.