Comparative behavior ofin situsilica generation in saturated rubbers: EPDM and hydrogenated natural rubber
| Autor: | Sirilux Poompradub, Napida Hinchiranan, Kitti Ongwongsakul, Garry L. Rempel |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
In situ
Materials science Polymers and Plastics Diene 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films chemistry.chemical_compound Hildebrand solubility parameter chemistry Natural rubber visual_art Polymer chemistry Materials Chemistry visual_art.visual_art_medium medicine Ozone degradation Swelling medicine.symptom 0210 nano-technology Glass transition |
| Zdroj: | Journal of Applied Polymer Science. 134 |
| ISSN: | 0021-8995 |
| DOI: | 10.1002/app.44748 |
| Popis: | Role of carbon-carbon double (CC) bonds content and their position in ethylene-propylene diene ter-polymer (EPDM), hydrogenated natural rubber (HNR) and natural rubber (NR) on in situ silica formation using tetraethoxysilane (TEOS) as a silica precursor is comparatively investigated. Glass transition temperature (Tg) reflecting rubber chain flexibility is found as an important factor for in situ silica generation via swelling method. Despite of similar solubility parameters, NR has higher TEOS-swelling degree resulting in the higher in situ silica content (30.8 phr) than EPDM (3.50 phr) and HNR (10.4–17.6 phr) due to the higher Tg of EPDM and HNR providing the less chain flexibility to be swollen in TEOS solution. The morphological analysis implies that CC bonds in saturated rubbers may be agglomeration sites for in situ silica particles. For practical applications, saturated rubbers containing in situ silica/NR vulcanizates showed the improvement of mechanical properties and resistance of thermal and ozone degradation. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 133, 44748. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text