Influence of Ultraviolet Radiation Exposure Time on Styrene-Ethylene-Butadiene-Styrene (SEBS) Copolymer
| Autor: | M.D. Samper, F. Parres, Daniel Garcia-Garcia, José E. Crespo-Amorós |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Polymers and Plastics Scanning electron microscope Block copolymer Mechanical properties 02 engineering and technology 010402 general chemistry 01 natural sciences Article Contact angle lcsh:QD241-441 Degradation Surface modification lcsh:Organic chemistry CIENCIA DE LOS MATERIALES E INGENIERIA METALURGICA Ultimate tensile strength Surface roughness Copolymer Composite material General Chemistry 021001 nanoscience & nanotechnology Surface energy 0104 chemical sciences Attenuated total reflection AFM 0210 nano-technology |
| Zdroj: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia instname Polymers, Vol 12, Iss 862, p 862 (2020) Polymers Volume 12 Issue 4 |
| Popis: | The effect of ultraviolet radiation on styrene-ethylene-butadiene-styrene (SEBS) has been studied at different exposures times in order to obtain a better understanding of the mechanism of ageing. The polymer materials were mechanically tested and then their surfaces were analyzed using a scanning electron microscope (SEM) and atomic force microscopy (AFM). Moreover, the optical analysis of contact angle (OCA) was used to evaluate the surface energy (&gamma s) and the yellowing index (YI) and attenuated total reflectance infrared spectroscopy (ATR&ndash FTIR) were used to observe structural and physical changes in aging SEBS. The results obtained for the SEBS, in relation to the duration of exposure, showed superficial changes that cause a decrease in the surface energy (&gamma s) and, therefore, a decrease in surface roughness. This led to a reduction in mechanical performance, decreasing the tensile strength by about 50% for exposure times of around 200 h. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|