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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Autores principales: Orgueira, H.A., Varela, O.
Formato: JOUR
Lenguaje:English
Materias:
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
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_0887624X_v39_n7_p973_Orgueira
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_0887624X_v39_n7_p973_Orgueira
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spelling todo:paper_0887624X_v39_n7_p973_Orgueira2023-10-03T15:40:59Z Synthesis and degradation of end-group-functionalized polylactide Orgueira, H.A. Varela, O. 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. JOUR English info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar 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)
language English
orig_language_str_mv English
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, H.A.
Varela, O.
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.
format JOUR
author Orgueira, H.A.
Varela, O.
author_facet Orgueira, H.A.
Varela, O.
author_sort Orgueira, H.A.
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
url http://hdl.handle.net/20.500.12110/paper_0887624X_v39_n7_p973_Orgueira
work_keys_str_mv AT orgueiraha synthesisanddegradationofendgroupfunctionalizedpolylactide
AT varelao synthesisanddegradationofendgroupfunctionalizedpolylactide
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