Chế tạo và tính chất của vật liệu nanocompozit trên cơ sở blend của cao su etylen-propylen-dien đồng trùng hợp với polyetylen tỷ trọng thấp và nanosilica

Abstract

In this work, rubber blend based on ethylene-propylene-dien-terpolymer (EPDM) and low density polyethylene (LDPE) and its nanocomposite with nanosilica were prepared by melt mixing method using an internal mixer at 120 ^oC. The results reveal that at the EPDM/LDPE ratio 80/20 the two components are good compatible. The optimal nanosilica content for reinforcement of EPDM/LDPE blend was 25 %. By surface modification of nanosilica with bis(3-triethoxysilypropyl) tetrasulfide (TESPT) or direct mixing with TESPT, nanosilica was well dispersed in EPDM/LDPE matrix with the diameter of nanosilica below 100 nm. The mechanical properties of the nanocomposites were significantly increased, especially the elongation at break about 50 % compared to rubber blend without reinforcement.

Keywords. EPDM, LDPE, blend, nanocomposite, nanosilica.