| 초록 |
Silica is the most important reinforcing filler in rubber industry. Due to its fine particle size (high specific surface area), it greatly improves the mechanical properties of the vulcanizates, particularly tensile strength, tear resistance, abrasion resistance and hardness. Recently, silica has become more important in tire applications as it provides several advantages over carbon black. In the present study, silane coupling agents(Si-69) and PEG 4000 as activator were selected for comparison of their reinforcing efficiency in a conventional vulcanization (CV) system. When silane coupling agent, which is corresponding to 8~10% of silica, was used, the result showed the most fine abrasion characteristic, heat build up, tanδ 60℃. And when activator was used, the result showed minimal increase of characteristics compared to coupling agent but it helped by prevention of reaggregation silica which makes decrease of viscosity and increase of crosslink density and dispersibility. |
