Bio-sourced networks from thermal polyaddition of a starch-derived α-Azide-ω-Alkyne AB monomer with an A2B2 aliphatic cross-linker

Autor: Jean-Pierre Pascault, Julien Bernard, Roberto J. J. Williams, Céline Besset, Philippe Cassagnau, Eric Drockenmuller, Etienne Fleury
Přispěvatelé: Ingénierie des Matériaux Polymères - Laboratoire des Matériaux Macromoléculaires (IMP-LMM), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet [Saint-Étienne] (UJM)-Centre National de la Recherche Scientifique (CNRS), Ingénierie des Matériaux Polymères - Laboratoire des Matériaux Polymères et des Biomatériaux (IMP-LMPB), Instituto de Investigaciones en Ciencia y Tecnologia de Materiales [Mar del Plata] (INTEMA), Consejo Nacional de Investigaciones Científicas y Técnicas [Buenos Aires] (CONICET)-Facultad de Ingeniería [Mar del Plata], Universidad Nacional de Mar del Plata [Mar del Plata] (UNMdP)-Universidad Nacional de Mar del Plata [Mar del Plata] (UNMdP)
Jazyk: angličtina
Rok vydání: 2010
Předmět:
BIO-SOURCED NETWORKS
STARCH-DERIVED MONOMER
Polymers and Plastics
Intramolecular reaction
Físico-Química
Ciencia de los Polímeros
Electroquímica
Side reaction
Alkyne
Propargylic compound
Cyclic ether polymer
Inorganic Chemistry
chemistry.chemical_compound
3-Dipolar cycloaddition
Polymer chemistry
Materials Chemistry
Cyclopolymer
Plant origin
Cyclopolymerization
POLYMER NETWORK
chemistry.chemical_classification
Bicyclic compound
Experimental study
Otras Ciencias Químicas
Organic Chemistry
Ciencias Químicas
Gel point
Triazole derivative polymer
[CHIM.MATE]Chemical Sciences/Material chemistry
Cycloaddition
Crosslinked polymer
Monomer
[CHIM.POLY]Chemical Sciences/Polymers
chemistry
1
3-Dipolar cycloaddition
Oxygen heterocycle
Preparation
CLICK CHEMISTRY
Azide
Glass transition
CIENCIAS NATURALES Y EXACTAS
Zdroj: International Journal of Biological Macromolecules
International Journal of Biological Macromolecules, Elsevier, 2010, pp.5672-5678
ISSN: 0141-8130
DOI: 10.1021/ma100770t
Popis: A starch-derived α-azide-ω-alkyne 1,4:3,6-dianhydrohexitol AB monomer and a novel symmetrical heterofunctional A2B2 aliphatic cross-linker, i.e., 2,2-bis(azidomethyl)-1,3-bis(O-propargyl) propanediol, were copolymerized at various molar ratios to generate biosourced networks through thermal 1,3-dipolar Huisgen polyaddition. The investigation of the cross-linking reactions through DSC analyses confirmed the highly exothermic character of the azide/alkyne cycloaddition (ΔH(total) = 232 ± 5 kJ/mol of functional groups of type A or B) and as predicted clearly underlined a one-to-one relationship between the glass transition temperature and the conversion. Experimental values of conversion at the gel point estimated from DSC and rheological measurements deviated significantly from the ideal main-field theory of network formation. On the basis of statistical calculations, this behavior was assigned to the occurrence of intramolecular cyclizations during the network formation. Although a significant fraction of intramolecular cycles was generated during the curing process, the AB + A2B2 thermal 1,3-dipolar Huisgen polyaddition strategy afforded relatively high glass transition temperature polytriazole networks (Tg ≥ 140 °C) using versatile processing conditions and in the absence of additives. Fil: Besset, Cèline. Université Claude Bernard Lyon 1; Francia Fil: Bernard, Julien. Université Claude Bernard Lyon 1; Francia Fil: Fleury, Etienne. Université Claude Bernard Lyon 1; Francia Fil: Pascault, Jean-Pierre.. Université Claude Bernard Lyon 1; Francia Fil: Cassagnau, Philippe. Université Claude Bernard Lyon 1; Francia Fil: Drockenmuller, Eric. Université Claude Bernard Lyon 1; Francia Fil: Williams, Roberto Juan Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
Databáze: OpenAIRE
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