| Journal: | Quimica nova |
| Database: | PERIÓDICA |
| System number: | 000313350 |
| ISSN: | 0100-4042 |
| Authors: | Fechine, Guilhermino Jose Macedo1 Santos, Joao Antonio Belmino dos2 Rabello, Marcelo Silveira |
| Institutions: | 1Universidade de Sao Paulo, Instituto de Quimica, Sao Paulo. Brasil 2Universidade Federal de Campina Grande, Departamento de Engenharia de Materiais, Campina Grande, Paraiba. Brasil |
| Year: | 2006 |
| Season: | Jul |
| Volumen: | 29 |
| Number: | 4 |
| Pages: | 674-680 |
| Country: | Brasil |
| Language: | Portugués |
| Document type: | Artículo |
| Approach: | Experimental, aplicado |
| English abstract | Samples of polypropylene (PP) and low-density polyethylene (LDPE) were submitted to ultraviolet radiation, in the natural environment and also in the laboratory. Chemical modifications were quantified by the carbonyl index (CI), mechanical properties and melt flow index. The degradation in the laboratory was comparatively faster than in the environment for both types of polymers. The accelerating factor was determined for the various properties investigated. This parameter, however, showed a large variation with the degradation criteria and the type of polymer. The existence of a "universal accelerating factor", therefore, was not observed in the current study |
| Disciplines: | Química |
| Keyword: | Química de polímeros, Polipropileno, Polietileno de baja densidad, Fotodegradación |
| Keyword: | Chemistry, Polymer chemistry, Polypropylene, Low density polyethylene, Photodegradation |
| Full text: | Texto completo (Ver HTML) |
