Synthesis and degradation of end-group-functionalized polylactide
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 po...
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paper:paper_0887624X_v39_n7_p973_Orgueira2023-06-08T15:46:52Z Synthesis and degradation of end-group-functionalized polylactide Orgueira, Hernan Antonio Varela, Oscar José 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 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. Fil:Orgueira, H.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Varela, O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2001 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0887624X_v39_n7_p973_Orgueira http://hdl.handle.net/20.500.12110/paper_0887624X_v39_n7_p973_Orgueira |
institution |
Universidad de Buenos Aires |
institution_str |
I-28 |
repository_str |
R-134 |
collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
topic |
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 |
spellingShingle |
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 Orgueira, Hernan Antonio Varela, Oscar José Synthesis and degradation of end-group-functionalized polylactide |
topic_facet |
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 |
description |
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. |
author |
Orgueira, Hernan Antonio Varela, Oscar José |
author_facet |
Orgueira, Hernan Antonio Varela, Oscar José |
author_sort |
Orgueira, Hernan Antonio |
title |
Synthesis and degradation of end-group-functionalized polylactide |
title_short |
Synthesis and degradation of end-group-functionalized polylactide |
title_full |
Synthesis and degradation of end-group-functionalized polylactide |
title_fullStr |
Synthesis and degradation of end-group-functionalized polylactide |
title_full_unstemmed |
Synthesis and degradation of end-group-functionalized polylactide |
title_sort |
synthesis and degradation of end-group-functionalized polylactide |
publishDate |
2001 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_0887624X_v39_n7_p973_Orgueira http://hdl.handle.net/20.500.12110/paper_0887624X_v39_n7_p973_Orgueira |
work_keys_str_mv |
AT orgueirahernanantonio synthesisanddegradationofendgroupfunctionalizedpolylactide AT varelaoscarjose synthesisanddegradationofendgroupfunctionalizedpolylactide |
_version_ |
1768542224970153984 |