Artículo
Abstract:
Three kinds of OH-terminated polylactides were synthesized by the ring-opening polymerization of lactide, with an alcohol such as dodecanol, glycerol, or pentaerythritol, in the presence of stannous octoate. Moreover, Cl-, NH2-, and COOH-terminated polylactides were synthesized from OH-terminated polylactides. The end groups of the polylactides were identified by 1H NMR and 18C NMR. According to thermal analysis, the cold crystallization temperatures of Cl-, NH2-, and COOH-terminated polylactides were higher than those of OH-terminated polylactides. The thermal stability of OH-terminated polylactides was poor, whereas NH2- and Cl-terminated polylactides were more resistant to thermal degradation. In a hydrolysis degradation test, the mass and molecular weight loss of COOH-terminated polylactides were high, whereas those of Cl- and NH2-terminated polylactides were much lower. These end-group effects were increased with an increasing number of chain arms. © 2001 John Wiley & Sons, Inc.
Registro:
| Documento: | Artículo |
| Título: | Synthesis and degradation of end-group-functionalized polylactide |
| Autor: | Orgueira, H.A.; Varela, O. |
| Filiación: | Depto. de Quim. Orgánica, Fac. de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabelln 2, 1428, Buenos Aires, Argentina |
| Idioma: | Inglés |
| Palabras clave: | Degradation; End group; Functionalized polylactide; Lactide; Polylactide; Alcohols; Biodegradation; Crystallization; Hydrolysis; Molecular weight; Nuclear magnetic resonance spectroscopy; Pyrolysis; Ring opening polymerization; Synthesis (chemical); Polylactides; Polyesters |
| Año: | 2001 |
| Volumen: | 39 |
| Número: | 7 |
| Página de inicio: | 973 |
| Página de fin: | 985 |
| DOI: | http://dx.doi.org/10.1002/1099-0518(20010401)39:7<973::AID-POLA1073>3.0.CO;2-8 |
| Título revista: | Journal of Polymer Science, Part A: Polymer Chemistry |
| Título revista abreviado: | J Polym Sci Part A |
| ISSN: | 0887624X |
| CODEN: | JPACE |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0887624X_v39_n7_p973_Orgueira |
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Citas:
---------- APA ----------
Orgueira, H.A. & Varela, O. (2001) . Synthesis and degradation of end-group-functionalized polylactide. Journal of Polymer Science, Part A: Polymer Chemistry, 39(7), 973-985.http://dx.doi.org/10.1002/1099-0518(20010401)39:7<973::AID-POLA1073>3.0.CO;2-8
---------- CHICAGO ----------
Orgueira, H.A., Varela, O. "Synthesis and degradation of end-group-functionalized polylactide" . Journal of Polymer Science, Part A: Polymer Chemistry 39, no. 7 (2001) : 973-985.http://dx.doi.org/10.1002/1099-0518(20010401)39:7<973::AID-POLA1073>3.0.CO;2-8
---------- MLA ----------
Orgueira, H.A., Varela, O. "Synthesis and degradation of end-group-functionalized polylactide" . Journal of Polymer Science, Part A: Polymer Chemistry, vol. 39, no. 7, 2001, pp. 973-985.http://dx.doi.org/10.1002/1099-0518(20010401)39:7<973::AID-POLA1073>3.0.CO;2-8
---------- VANCOUVER ----------
Orgueira, H.A., Varela, O. Synthesis and degradation of end-group-functionalized polylactide. J Polym Sci Part A. 2001;39(7):973-985.http://dx.doi.org/10.1002/1099-0518(20010401)39:7<973::AID-POLA1073>3.0.CO;2-8
