Cited by 46biodegradable polymer synthesis and propertiesPolymer crystallization and propertiesPolymer composites and self-healing

Biodegradable Poly(ester–urethane–amide)s Based on Poly(ε-caprolactone) and Diamide–Diol Chain Extenders with Crystalline Hard Segments. Synthesis and Characterization

Báez, José E., Ramírez, Daniel, Valentín, Juan L., Marcos-Fernández, Ángel·2012·Macromolecules

Abstract

Twenty seven poly(ester–urethane–amide)s (PEUAs) were synthesized from the reaction of α,ω-telechelic poly(ε-caprolactone) diols, 1,6-hexamethylene diisocyanate, and three different diamide–diol chain extenders derived from ε-caprolactone and three aliphatic diamines with increasing length ( n = 2, 4, and 6). The hard segment (HS) was designed to be crystalline and to introduce amide groups, more susceptible to hydrolysis than urethane or urea groups. Crystallization of the HS was achieved even at very low HS content, leading to a phase-separated material. Furthermore, HS crystallinity recovered from the material homogeneous melt on cooling. Thermal degradation was well above HS melting point, allowing for melt processing of these materials. HS melting point was affected by HS content, poly(ε-caprolactone) diol length, and chain extender length. The length scale of the phase-separated morphology lied in between 11 and 13 nm up to ∼60% HS content and decreased at higher HS content values. HS content was the main parameter affecting the mechanical properties. The prepared PEUAs degraded hydrolytically at very long times by surface erosion.

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Crossref · 10.1021/ma300990s

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Authors
Báez, J. E., Ramírez, D., Valentín, J. L., & Marcos-Fernández, Á.
Affiliations
  • Consejo Superior de Investigaciones Científicas (ES)
  • Instituto de Ciencia y Tecnología de Polímeros (CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain
Corresponding author
Marcos-Fernández, Ángel
Venue
Macromolecules
Published
2012-08-16
Volume
45
Issue
17
Pages
6966-6980
ISSN
  • 0024-9297 (ISSN-L)
  • 1520-5835
OpenAlex
W2322862604
Cited by
46
References
29
Citations by year
2026: 5 · 2025: 6 · 2024: 6 · 2023: 1 · 2022: 3 · 2021: 2 · 2020: 1 · 2019: 4 · 2018: 2 · 2017: 7 · 2016: 2 · 2015: 2 · 2014: 5
FWCI
0.91
Type
journal article
Language
en
Open access
closed
Locations
Macromolecules (publishedVersion)
Topics
  • Physical Sciences › Materials Science › Biomaterials › biodegradable polymer synthesis and properties
  • Physical Sciences › Materials Science › Polymers and Plastics › Polymer crystallization and properties
  • Physical Sciences › Materials Science › Polymers and Plastics › Polymer composites and self-healing
Keywords
polycaprolactone, hexamethylene diisocyanate, phase separation, thermal degradation, melt processing, hydrolytic degradation, surface erosion, mechanical properties, biodegradable polymers

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