| Journal: | Materials research |
| Database: | PERIÓDICA |
| System number: | 000312908 |
| ISSN: | 1516-1439 |
| Authors: | Duarte, Marcia Adriana Tomaz1 Hugen, Roberson Goulart Martins, Eduardo Sant'Anna Pezzin, Sergio Henrique Pezzin, Ana Paula Testa2 |
| Institutions: | 1Universidade do Estado de Santa Catarina, Centro de Ciencias Tecnologicas, Joinville, Santa Catarina. Brasil 2Universidade da Regiao de Joinville, Joinville, Santa Catarina. Brasil |
| Year: | 2006 |
| Season: | Ene-Mar |
| Volumen: | 9 |
| Number: | 1 |
| Pages: | 25-28 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Nota breve o noticia |
| Approach: | Experimental |
| English abstract | Aiming the development of high-performance biodegradable polymer materials, the properties and the processing behavior of poly(3-hydroxybutyrate), P(3HB), and their blends with poly(e-caprolactone), PCL, have been investigated. The P(3HB) sample, obtained from sugarcane, had a molecular weight of 3.0 x 105 g.mol1, a crystallinity degree of 60%, a glass transition temperature (Tg), at - 0.8 °C, and a melting temperature at 171 °C. The molecular weight of PCL was 0.8 x 105 g.mol-1. Specimens of 70/30 wt. (%) P(3HB)/PCL blends obtained by injection molding showed tensile strength of 21.9 (± 0.4) MPa, modulus of 2.2 (± 0.3) GPa, and a relatively high elongation at break, 87 (± 20)%. DSC analyses of this blend showed two Tg´s, at - 10.6 °C for the P(3HB) matrix, and at - 62.9 °C for the PCL domains. The significant decrease on the Tg of P(3HB) evidences a partial miscibility of PCL in P(3HB). According to the Fox equation, the new Tg corresponds to a 92/8 wt. (%) P(3HB)/PCL composition |
| Disciplines: | Ingeniería, Química, Física y astronomía |
| Keyword: | Ingeniería de materiales, Ingeniería mecánica, Química de polímeros, Mecánica, elasticidad y reología, Propiedades mecánicas, Biodegradación, Resistencia mecánica, Rendimiento |
| Keyword: | Engineering, Chemistry, Physics and astronomy, Materials engineering, Mechanical engineering, Polymer chemistry, Mechanics, elasticity and rheology, Mechanical properties, Biodegradation, Mechanical resistance, Yield |
| Full text: | Texto completo (Ver HTML) |
