| Revista: | Maderas : ciencia y tecnología |
| Base de datos: | |
| Número de sistema: | 000544723 |
| ISSN: | 0718-221X |
| Autores: | Mattos, Bruno D1 Missio, André L2 de Cademartori, Pedro H.G3 Gatto, Darci A2 Magalhães, Washington L.E1 |
| Instituciones: | 1Federal University of Paraná, Polytechnic Centre, Curitiba. Brasil 2Federal University of Santa Maria, Centre for Rural Sciences, Santa Maria. Brasil 3Federal University of Paraná, Wood and Forestry Science Center, Curitiba. Brasil 4Embrapa Forestry, Colombo, Parana. Brasil |
| Año: | 2016 |
| Periodo: | Ene |
| Volumen: | 18 |
| Número: | 1 |
| Paginación: | 113-124 |
| País: | Chile |
| Idioma: | Inglés |
| Resumen en inglés | The aim of this study was to evaluate the colorimetric properties of Pinus taeda and Schizolobium parahybum woods treated by in situ polymerization. The wood samples were impregnated in a vacuum/pressure system and polymerized in an oven at 90°C for 10h, using benzoyl peroxide at 1,5wt% as the catalyst. The treatments were characterized using attenuated total reflectance infrared (ATR-IR) spectroscopy and weight percentage gain (WPG). The color evaluation was performed using CIEL*a*b* concepts, specular gloss, and UV-Visible spectrophotometry. Treated woods showed increases in band intensity related to polymers (1730, 1460 and 1145 cm-1), and WPG ranged from 39 to 164%, depending of the wood species and treatments. Lightness decreased, while the Chroma, gloss and the color coordinates increased. A darkening of the all treated samples was observed, and confirmed by the decrease in the reflectance intensity between 400 and 700 nm. |
| Keyword: | CIEL*a*b*, Free radical polymerization, Heat catalyst, UV-Vis, Wood-polymer, Composites |
| Texto completo: | Texto completo (Ver HTML) Texto completo (Ver PDF) |
