Study on the storage performance of MG30/NRL co-blended latexes

Abstract

Modifying natural rubber latex (NRL) and blending it with NRL can improve NRL performance and expand application elds. The performance of co-blended latex will change due to changes in non-rubber components during storage. Therefore, it is important to study the change of properties during the storage of co-blended latexes. In this paper, 30% methyl methacrylate grafted natural rubber (MG30) was synthesized by cumene hydroperoxide/ tetraethylenepentamine (CHPO/TEPA) initiating system, MG30 and NRL were mixed in different proportions to study the morphology and physical and mechanical properties, and the colloidal properties and emulsion properties of co-blended latexes were studied during storage. The results showed that the mechanical stability of NRL and co-blended latexes were high and the viscosity gradually increased during storage. The study of the vulcanization characteristics of the coblended latexes lms and the physical and mechanical properties of the vulcanized latex lms showed that the vulcanization time of the co-blended lms increased and the torque value increased in comparison to NRL. With the increase of MG30 content, the tensile strength and tear strength of the coblended latexes vulcanized lms showed a trend of increasing and then decreasing, and the co-blended lm with 10% MG30 showed the best mechanical properties.