| 초록 |
Typically a passenger tire tread compound consists of SBR, BR and reinforcing particles. There are various grades of SBR with different content of styrene and vinyl which influences glass transition temperature and tire performances. In this study, unfilled and silica-filled SBR/BR blends with various styrene contents of SBR were prepared. A phase separation behavior of unfilled SBR/BR blend was analyzed by TEM and dynamic mechanical properties (ARES). Silica distribution and dispersion of silica-filled SBR/BR were analyzed by TEM and USAXS. It was found that phase separation between SBR and BR was clear when styrene content is above 39%, while it was not for styrene content of 21%. Silica-filled SBR/BR compound with high styrene SBR (39%) showed uneven silica distribution with a formation of silica aggregate clusters, while that with low styrene SBR (21%) didn't show such behavior. Dynamic mechanical properties appeared to be related to such morphological behavior. |
