| Autor: |
José Rogelio Rodríguez Talavera, Francisco Quintanilla Guerrero, Maykel González Torres, Eric M. Rivera Muñoz, Ma. del Pilar Carreón-Castro, Genoveva Hernández Padrón, Susana Vargas Muñoz |
| Rok vydání: |
2015 |
| Předmět: |
|
| Zdroj: |
Vibrational Spectroscopy. 76:55-62 |
| ISSN: |
0924-2031 |
| DOI: |
10.1016/j.vibspec.2014.12.003 |
| Popis: |
The present study is aimed to investigate the degree of crystallinity of poly(3-hydroxybutyrate) P(3HB) grafted with poly(2-aminoethyl methacrylate hydrochloride) (PAEMA) chains using WAXS, micro Raman, and FTIR spectroscopy. The samples were obtained by radiation induced graft polymerization of the monomer in the substrate using different solvents for comparison. The results of crystallinity are consistent with those obtained of lower crystallinity in grafting copolymer relative to the substrate P(3HB). The low crystallinity is directly related to the increase of the degree of grafting, meaning that although the P(3HB) amorphous region is grafted, the crystalline zone is also affected in some extent by the grafting process and the environment of the new molecule. Three different methods were surveyed to determine the variation of crystallinity degree with the grafting degree. It is shown that all methods provide linear relationships between these variables, but WAXS method was found more acceptable than the others (FTIR and Raman). A detailed characterization of the vibrational bands characteristic of amorphous and helical crystalline structure of the grafting copolymers are also highlighted. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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