Comparison of reinforcing efficiency between Si-69 and Si-264 in a conventional vulcanization system |
| |
Authors: | Pongdhorn Sae-oui Chakrit Sirisinha Uthai Thepsuwan Kannika Hatthapanit |
| |
Institution: | a National Metal and Materials Technology Center, 114 Thailand Science Park, Paholyothin Road, Klong 1, Klong-Luang, Pathumthani 12120, Thailand b Faculty of Science, Mahidol University, Rama VI Road, Rajdhevee, Bangkok 10400, Thailand |
| |
Abstract: | Silica has long been recognized as a reinforcing filler, especially for light colored products. The degree of reinforcement is noticeably increased when silica is used in combination with silane coupling agent. Therefore, various types of silane coupling agents are now commercially available. In the present study, two types of silane coupling agents, e.g., bis-(3-triethoxysilylpropyl) tetrasulfane (Si-69) and 3-thiocyanatopropyl triethoxy silane (Si-264) were selected for comparison of their reinforcing efficiency in a conventional vulcanization (CV) system. The results reveal that the addition of silane coupling agent not only improves compound processability, but also enhances the mechanical properties of the rubber vulcanizates. Compared with Si-69, Si-264 gives rubber compounds with better processability due to its greater ability to promote filler dis-agglomeration during mixing. In addition, Si-264 also imparts a greater degree of reinforcement. This might be attributed to the combined effects of better rubber–filler interaction, better filler dispersion and higher state of cure which are obtained when Si-69 is replaced with Si-264. The dynamic properties of the rubber vulcanizates are also improved with the presence of silane coupling agent. In this aspect, Si-69 performs better than Si-264 as it provides rubber vulcanizates with lower heat build-up. |
| |
Keywords: | Silane coupling agent Rubber Reinforcement Mechanical properties |
本文献已被 ScienceDirect 等数据库收录! |
|