1H-NMR spectroscopic study of the effect of aging vascular prostheses made of poly(ethylene terephthalate) on the macromolecular weight
Trichloroacetyl isocyanate reacts rapidly and quantitatively with both acid and hydroxyl chain ends to form derivatives that can be readily determined by 1H‐NMR spectroscopy. This method provides a convenient mean for characterization of polyethylene terephthalate (PET) end‐groups. The 1H‐NMR spectr...
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| Published in | Journal of biomedical materials research. Part A Vol. 91A; no. 3; pp. 939 - 952 |
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| Main Authors | , , , , , |
| Format | Journal Article |
| Language | English |
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01.12.2009
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| Abstract | Trichloroacetyl isocyanate reacts rapidly and quantitatively with both acid and hydroxyl chain ends to form derivatives that can be readily determined by 1H‐NMR spectroscopy. This method provides a convenient mean for characterization of polyethylene terephthalate (PET) end‐groups. The 1H‐NMR spectroscopy has been applied to describe the chemical aging of the PET vascular prostheses by determination of the hydroxyl and carboxyl end‐group concentrations and therefore the macromolecular weight. To validate 1H‐NMR results, we used chemical titration of the end‐groups and classical viscosimetric method as complementary techniques. The analyses made on the explants of different lifetime demonstrated a significant deterioration compared with the virgin prostheses. A high degradation of macromolecular weight is observed. This phenomenon is explained by a random scission of the ester linkages. © 2009 Wiley Periodicals, Inc. J Biomed Mater Res, 2009 |
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| AbstractList | Trichloroacetyl isocyanate reacts rapidly and quantitatively with both acid and hydroxyl chain ends to form derivatives that can be readily determined by (1)H-NMR spectroscopy. This method provides a convenient mean for characterization of polyethylene terephthalate (PET) end-groups. The (1)H-NMR spectroscopy has been applied to describe the chemical aging of the PET vascular prostheses by determination of the hydroxyl and carboxyl end-group concentrations and therefore the macromolecular weight. To validate (1)H-NMR results, we used chemical titration of the end-groups and classical viscosimetric method as complementary techniques. The analyses made on the explants of different lifetime demonstrated a significant deterioration compared with the virgin prostheses. A high degradation of macromolecular weight is observed. This phenomenon is explained by a random scission of the ester linkages. Trichloroacetyl isocyanate reacts rapidly and quantitatively with both acid and hydroxyl chain ends to form derivatives that can be readily determined by 1H-NMR spectroscopy. This method provides a convenient mean for characterization of polyethylene terephthalate (PET) end-groups. The 1H-NMR spectroscopy has been applied to describe the chemical aging of the PET vascular prostheses by determination of the hydroxyl and carboxyl end-group concentrations and therefore the macromolecular weight. To validate 1H-NMR results, we used chemical titration of the end-groups and classical viscosimetric method as complementary techniques. The analyses made on the explants of different lifetime demonstrated a significant deterioration compared with the virgin prostheses. A high degradation of macromolecular weight is observed. This phenomenon is explained by a random scission of the ester linkages. [copy 2009 Wiley Periodicals, Inc. J Biomed Mater Res, 2009 Trichloroacetyl isocyanate reacts rapidly and quantitatively with both acid and hydroxyl chain ends to form derivatives that can be readily determined by super(1)H-NMR spectroscopy. This method provides a convenient mean for characterization of polyethylene terephthalate (PET) end-groups. The super(1)H-NMR spectroscopy has been applied to describe the chemical aging of the PET vascular prostheses by determination of the hydroxyl and carboxyl end-group concentrations and therefore the macromolecular weight. To validate super(1)H-NMR results, we used chemical titration of the end-groups and classical viscosimetric method as complementary techniques. The analyses made on the explants of different lifetime demonstrated a significant deterioration compared with the virgin prostheses. A high degradation of macromolecular weight is observed. This phenomenon is explained by a random scission of the ester linkages. Trichloroacetyl isocyanate reacts rapidly and quantitatively with both acid and hydroxyl chain ends to form derivatives that can be readily determined by 1H‐NMR spectroscopy. This method provides a convenient mean for characterization of polyethylene terephthalate (PET) end‐groups. The 1H‐NMR spectroscopy has been applied to describe the chemical aging of the PET vascular prostheses by determination of the hydroxyl and carboxyl end‐group concentrations and therefore the macromolecular weight. To validate 1H‐NMR results, we used chemical titration of the end‐groups and classical viscosimetric method as complementary techniques. The analyses made on the explants of different lifetime demonstrated a significant deterioration compared with the virgin prostheses. A high degradation of macromolecular weight is observed. This phenomenon is explained by a random scission of the ester linkages. © 2009 Wiley Periodicals, Inc. J Biomed Mater Res, 2009 |
| Author | Chaouch, W. Le Nouen, D. Durand, B. Dieval, F. Defoin, A. Chakfe, N. |
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| SubjectTerms | 1H-NMR spectroscopy Blood Vessel Prosthesis chemical aging Derivatives Humans Hydrolysis Macromolecular Substances macromolecular weight Magnetic Resonance Spectroscopy - methods Materials Testing Models, Chemical Molecular Weight polyethylene terephthalate Polyethylene terephthalates Polyethylene Terephthalates - chemistry Prostheses Prosthesis Failure Prosthetics Reproduction Scission Spectroscopy Surgical implants Time Factors vascular prosthesis Viscosity |
| Title | 1H-NMR spectroscopic study of the effect of aging vascular prostheses made of poly(ethylene terephthalate) on the macromolecular weight |
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