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Alkaline degradation study of linear and network poly(ε-caprolactone)
- Source :
- Journal of Materials Science: Materials in Medicine. 22:11-18
- Publication Year :
- 2010
- Publisher :
- Springer Science and Business Media LLC, 2010.
-
Abstract
- Alkaline hydrolysis of a polycaprolactone (PCL) network obtained by photopolymerization of a PCL macromer was investigated. The PCL macromer was obtained by the reaction of PCL diol with methacrylic anhydride. Degradation of PCL network is much faster than linear PCL; the weight loss rate is approximately constant until it reaches around 70%, which happens after approximately 60 h in PCL network and 600 h in linear PCL. Calorimetric results show no changes in crystallinity throughout degradation, suggesting that it takes place in the crystalline and amorphous phases simultaneously. Scanning electron microscopy microphotographs indicate that degradation is produced by a different erosion mechanism in both kinds of samples. The more hydrophilic network PCL would follow a bulk-erosion mechanism, whereas linear PCL would follow a surface-erosion mechanism. Mechanical testing of degraded samples shows a decline in mechanical properties due to changes in sample porosity as a consequence of the degradation process.
- Subjects :
- Materials science
Polyesters
Biomedical Engineering
Biophysics
Methacrylic anhydride
Bioengineering
macromolecular substances
Absorption
Polymerization
Biomaterials
Crystallinity
chemistry.chemical_compound
Absorbable Implants
Materials Testing
Polymer chemistry
Alkaline hydrolysis
Calorimetry, Differential Scanning
Tissue Scaffolds
Hydrolysis
Temperature
technology, industry, and agriculture
Hydrogen-Ion Concentration
equipment and supplies
musculoskeletal system
Macromonomer
Biomechanical Phenomena
Photopolymer
chemistry
Chemical engineering
Polycaprolactone
Microscopy, Electron, Scanning
Degradation (geology)
Crystallization
Porosity
Caprolactone
Subjects
Details
- ISSN :
- 15734838 and 09574530
- Volume :
- 22
- Database :
- OpenAIRE
- Journal :
- Journal of Materials Science: Materials in Medicine
- Accession number :
- edsair.doi.dedup.....36ffa03c48a09619710bac1738bce665