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Crystallization Behavior and Mechanical Properties of Poly(ε-caprolactone) Reinforced with Barium Sulfate Submicron Particles

Poly(ε-caprolactone) (PCL) was mixed with submicron particles of barium sulfate to obtain biodegradable radiopaque composites. X-ray images comparing with aluminum samples show that 15 wt.% barium sulfate (BaSO(4)) is sufficient to present radiopacity. Thermal studies by differential scanning calori...

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Autores principales: Amestoy, Hegoi, Diego, Paul, Meaurio, Emilio, Muñoz, Jone, Sarasua, Jose-Ramon
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8125263/
https://www.ncbi.nlm.nih.gov/pubmed/34063190
http://dx.doi.org/10.3390/ma14092368
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author Amestoy, Hegoi
Diego, Paul
Meaurio, Emilio
Muñoz, Jone
Sarasua, Jose-Ramon
author_facet Amestoy, Hegoi
Diego, Paul
Meaurio, Emilio
Muñoz, Jone
Sarasua, Jose-Ramon
author_sort Amestoy, Hegoi
collection PubMed
description Poly(ε-caprolactone) (PCL) was mixed with submicron particles of barium sulfate to obtain biodegradable radiopaque composites. X-ray images comparing with aluminum samples show that 15 wt.% barium sulfate (BaSO(4)) is sufficient to present radiopacity. Thermal studies by differential scanning calorimetry (DSC) show a statistically significant increase in PCL degree of crystallinity from 46% to 52% for 25 wt.% BaSO(4). Non-isothermal crystallization tests were performed at different cooling rates to evaluate crystallization kinetics. The nucleation effect of BaSO(4) was found to change the morphology and quantity of the primary crystals of PCL, which was also corroborated by the use of a polarized light optical microscope (PLOM). These results fit well with Avrami–Ozawa–Jeziorny model and show a secondary crystallization that contributes to an increase in crystal fraction with internal structure reorganization. The addition of barium sulfate particles in composite formulations with PCL improves stiffness but not strength for all compositions due to possible cavitation effects induced by debonding of reinforcement interphase.
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spelling pubmed-81252632021-05-17 Crystallization Behavior and Mechanical Properties of Poly(ε-caprolactone) Reinforced with Barium Sulfate Submicron Particles Amestoy, Hegoi Diego, Paul Meaurio, Emilio Muñoz, Jone Sarasua, Jose-Ramon Materials (Basel) Article Poly(ε-caprolactone) (PCL) was mixed with submicron particles of barium sulfate to obtain biodegradable radiopaque composites. X-ray images comparing with aluminum samples show that 15 wt.% barium sulfate (BaSO(4)) is sufficient to present radiopacity. Thermal studies by differential scanning calorimetry (DSC) show a statistically significant increase in PCL degree of crystallinity from 46% to 52% for 25 wt.% BaSO(4). Non-isothermal crystallization tests were performed at different cooling rates to evaluate crystallization kinetics. The nucleation effect of BaSO(4) was found to change the morphology and quantity of the primary crystals of PCL, which was also corroborated by the use of a polarized light optical microscope (PLOM). These results fit well with Avrami–Ozawa–Jeziorny model and show a secondary crystallization that contributes to an increase in crystal fraction with internal structure reorganization. The addition of barium sulfate particles in composite formulations with PCL improves stiffness but not strength for all compositions due to possible cavitation effects induced by debonding of reinforcement interphase. MDPI 2021-05-02 /pmc/articles/PMC8125263/ /pubmed/34063190 http://dx.doi.org/10.3390/ma14092368 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Amestoy, Hegoi
Diego, Paul
Meaurio, Emilio
Muñoz, Jone
Sarasua, Jose-Ramon
Crystallization Behavior and Mechanical Properties of Poly(ε-caprolactone) Reinforced with Barium Sulfate Submicron Particles
title Crystallization Behavior and Mechanical Properties of Poly(ε-caprolactone) Reinforced with Barium Sulfate Submicron Particles
title_full Crystallization Behavior and Mechanical Properties of Poly(ε-caprolactone) Reinforced with Barium Sulfate Submicron Particles
title_fullStr Crystallization Behavior and Mechanical Properties of Poly(ε-caprolactone) Reinforced with Barium Sulfate Submicron Particles
title_full_unstemmed Crystallization Behavior and Mechanical Properties of Poly(ε-caprolactone) Reinforced with Barium Sulfate Submicron Particles
title_short Crystallization Behavior and Mechanical Properties of Poly(ε-caprolactone) Reinforced with Barium Sulfate Submicron Particles
title_sort crystallization behavior and mechanical properties of poly(ε-caprolactone) reinforced with barium sulfate submicron particles
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8125263/
https://www.ncbi.nlm.nih.gov/pubmed/34063190
http://dx.doi.org/10.3390/ma14092368
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