الفهرس | Only 14 pages are availabe for public view |
Abstract Hybrid composites of styrene butadiene rubber (SBR) with two different waste fillers namely, microcrystalline cellulose (MCC) extracted from rice straw and waste rubber ash (WRA) were prepared in internal mixer, then molded on hot press to form sheets samples. Gamma irradiation doses ranged from (25 up to 150 kGy) has been applied to induce crosslinking for SBR composites that loaded by reinforcement filler which is untreated or surface treated by both acrylate and silane as coupling agents. The concentration of MCC from 5-20 phr, meanwhile WRA from 5-40 phr. The fillers were characterized by FTIR and XRD. Physico-mechanical properties like TS, tensile modulus, sol fraction and crosslinking density were investigated as a function of filler content and irradiation dose. SEM as well the thermal analysis (TGA) was done for selected composites. The results show that MCC and WRA increase mechanical properties and crosslink density, also the thermal stability were improved. |