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Artículo

Effect of the hard segment chemistry and structure on the thermal and mechanical properties of novel biomedical segmented poly(esterurethanes)

Caracciolo, Pablo ChristianIcon ; Buffa, Fabián Alejandro; Abraham, Gustavo AbelIcon
Fecha de publicación: 08/2008
Editorial: Springer
Revista: Journal of Materials Science: Materials In Medicine
ISSN: 0957-4530
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Biotecnología Industrial

Resumen

Two series of biomedical segmented polyurethanes (SPU) based on poly(ε-caprolactone) diol (PCL diol), 1,6-hexamethylene diisocyanate (HDI) or L-lysine methyl ester diisocyanate (LDI) and three novel chain extenders, were synthesized and characterized. Chain extenders containing urea groups or an aromatic aminoacid derivative were incorporated in the SPU formulation to strengthen the hard segment interactions through either bidentate hydrogen bonding or p-stacking interactions, respectively. By varying the composition of the hard segment (diisocyanate and chain extender), its structure was varied to investigate the structure-property relationships. The different chemical composition and symmetry of hard segment modulated the phase separation of soft and hard domains, as demonstrated by the thermal behavior. Hard segment association was more enhanced by using a combination of symmetric diisocyanate and urea-diol chain extenders. The hard segment cohesion had an important effect on the observed mechanical behavior. Polyurethanes synthesized using HDI (Series H) were stronger than those obtained using LDI (Series L). The latter SPU exhibited no tendency to undergo cold-drawing and the lowest ultimate properties. Incorporation of the aromatic chain extender produced opposite effects, resulting in polyurethanes with the highest elongation and tearing energy (Series H) and the lowest strain at break (Series L). Since the synthesized biodegradable SPU possess a range of thermal and mechanical properties, these materials may hold potential for use in soft tissue engineering scaffold applications.
Palabras clave: Hard Segment , Thermal Properties , Mechanical Properties , Segmented Poly(Esterurethanes)
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution 2.5 Unported (CC BY 2.5)
Identificadores
URI: http://hdl.handle.net/11336/66299
URL: https://link.springer.com/article/10.1007/s10856-008-3561-8
DOI: https://doi.org/10.1007/s10856-008-3561-8
Colecciones
Articulos(INTEMA)
Articulos de INST.DE INV.EN CIENCIA Y TECNOL.MATERIALES (I)
Citación
Caracciolo, Pablo Christian; Buffa, Fabián Alejandro; Abraham, Gustavo Abel; Effect of the hard segment chemistry and structure on the thermal and mechanical properties of novel biomedical segmented poly(esterurethanes); Springer; Journal of Materials Science: Materials In Medicine; 20; 1; 8-2008; 145-155
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