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Effect of bioactive glass particles on the thermal degradation behaviour of medical polyesters

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Title: Effect of bioactive glass particles on the thermal degradation behaviour of medical polyesters
Authors: Larrañaga, A.1, Sarasua, Jose-Ramon jr.sarasua@ehu.es
Source: Polymer Degradation & Stability. Mar2013, Vol. 98 Issue 3, p751-758. 8p.
Subjects: Polymer degradation, Polyesters, Caprolactones, Bioactive glasses, Thermogravimetry, Differential scanning calorimetry, Activation energy, Thermal resistance, Absorbance scale (Spectroscopy)
Abstract: Abstract: The thermal degradation behaviour of poly(ε-caprolactone) (PCL), poly(l-lactide) (PLLA) and poly(lactide/ε-caprolactone) (PLCL) and of composites of these polymers filled with bioglass particles was investigated by means of thermogravimetric analysis (TGA). According to the activation energies calculated by the Friedman approach, PCL showed the highest resistance to thermal degradation. Addition of bioglass induced a reaction between the ester groups of the polyesters and the SiO− groups present in the surface of bioglass particles which caused a 1.3–1.9 fold decrease in activation energies of the composites with respect to their unfilled polymer counterparts. This reaction was proven by the increase in the absorbance of the carboxylate peak in the infrared spectra of the composite films maintained at 210 °C and confirmed the random chain scission of the polymer chains. This fact caused a significant decrease in the featured thermal transitions of the polymers as determined by the differential scanning calorimetry (DSC) measurements. [Copyright &y& Elsevier]
Copyright of Polymer Degradation & Stability is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 85252329
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Effect of bioactive glass particles on the thermal degradation behaviour of medical polyesters
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  Data: <searchLink fieldCode="AR" term="%22Larrañaga%2C+A%2E%22">Larrañaga, A.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Sarasua%2C+Jose-Ramon%22">Sarasua, Jose-Ramon</searchLink><i> jr.sarasua@ehu.es</i>
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  Data: <searchLink fieldCode="JN" term="%22Polymer+Degradation+%26+Stability%22">Polymer Degradation & Stability</searchLink>. Mar2013, Vol. 98 Issue 3, p751-758. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Polymer+degradation%22">Polymer degradation</searchLink><br /><searchLink fieldCode="DE" term="%22Polyesters%22">Polyesters</searchLink><br /><searchLink fieldCode="DE" term="%22Caprolactones%22">Caprolactones</searchLink><br /><searchLink fieldCode="DE" term="%22Bioactive+glasses%22">Bioactive glasses</searchLink><br /><searchLink fieldCode="DE" term="%22Thermogravimetry%22">Thermogravimetry</searchLink><br /><searchLink fieldCode="DE" term="%22Differential+scanning+calorimetry%22">Differential scanning calorimetry</searchLink><br /><searchLink fieldCode="DE" term="%22Activation+energy%22">Activation energy</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+resistance%22">Thermal resistance</searchLink><br /><searchLink fieldCode="DE" term="%22Absorbance+scale+%28Spectroscopy%29%22">Absorbance scale (Spectroscopy)</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Abstract: The thermal degradation behaviour of poly(ε-caprolactone) (PCL), poly(l-lactide) (PLLA) and poly(lactide/ε-caprolactone) (PLCL) and of composites of these polymers filled with bioglass particles was investigated by means of thermogravimetric analysis (TGA). According to the activation energies calculated by the Friedman approach, PCL showed the highest resistance to thermal degradation. Addition of bioglass induced a reaction between the ester groups of the polyesters and the SiO− groups present in the surface of bioglass particles which caused a 1.3–1.9 fold decrease in activation energies of the composites with respect to their unfilled polymer counterparts. This reaction was proven by the increase in the absorbance of the carboxylate peak in the infrared spectra of the composite films maintained at 210 °C and confirmed the random chain scission of the polymer chains. This fact caused a significant decrease in the featured thermal transitions of the polymers as determined by the differential scanning calorimetry (DSC) measurements. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Polymer Degradation & Stability is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1016/j.polymdegradstab.2012.12.015
    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 8
        StartPage: 751
    Subjects:
      – SubjectFull: Polymer degradation
        Type: general
      – SubjectFull: Polyesters
        Type: general
      – SubjectFull: Caprolactones
        Type: general
      – SubjectFull: Bioactive glasses
        Type: general
      – SubjectFull: Thermogravimetry
        Type: general
      – SubjectFull: Differential scanning calorimetry
        Type: general
      – SubjectFull: Activation energy
        Type: general
      – SubjectFull: Thermal resistance
        Type: general
      – SubjectFull: Absorbance scale (Spectroscopy)
        Type: general
    Titles:
      – TitleFull: Effect of bioactive glass particles on the thermal degradation behaviour of medical polyesters
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            NameFull: Larrañaga, A.
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            NameFull: Sarasua, Jose-Ramon
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            – D: 01
              M: 03
              Text: Mar2013
              Type: published
              Y: 2013
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              Value: 98
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            – TitleFull: Polymer Degradation & Stability
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