The influence of gamma radiation on the glass transition of hydroxyapatite/poly L-lactide composite
Само за регистроване кориснике
2007
Конференцијски прилог (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
Hydroxyapatite/poly L-lactide (HAp/PLLA) is a composite biomaterial which has been widely utilized for substitution and reparation of the hard bone tissue. It is well known that gamma irradiation has been successfully employed in the modification/sterilization of such porous composites and that it has advantages over other procedures. In this study, differential scanning calorimetry (DSC) measurements were made to investigate the influence of the radiation on glass transition behavior and structural relaxation, as well as to estimate the activation energy for this process. The apparent activation energy Delta H* for structural relaxation in the glass transition region was determined on the basis of the heating rate dependence of the glass transition temperature T-g. Furthermore, the results were correlated with those obtained by gel permeation chromatography (GPC). Our findings support the fact that the radiation-induced chain scission in the PLLA phase is the main reason for the decre...ase of the glass transition temperature and/or activation energy with the absorbed dose.
Кључне речи:
apparent activation energy / gamma radiation / glass transition / hydroxyapatite/poly L-lactideИзвор:
Research Trends in Contemporary Materials Science, 2007, 555, 497-502Издавач:
- Trans Tech Publications, Ltd.
Финансирање / пројекти:
- Синтеза функционалних материјала са контролисаном структуром на молекуларном и нано нивоу (RS-MESTD-MPN2006-2010-142006)
Напомена:
- Materials Science Forum 555
DOI: 10.4028/www.scientific.net/MSF.555.497
ISBN: 978-0878494415
ISSN: 0255-5476 (print)
WoS: 000249653700080
Scopus: 2-s2.0-38349039444
Институција/група
Институт техничких наука САНУ / Institute of Technical Sciences of SASATY - CONF AU - Milićević, Dejan S. AU - Trifunović, S. AU - Ignjatović, Nenad AU - Suljovrujić, Edin H. PY - 2007 UR - https://dais.sanu.ac.rs/123456789/2754 AB - Hydroxyapatite/poly L-lactide (HAp/PLLA) is a composite biomaterial which has been widely utilized for substitution and reparation of the hard bone tissue. It is well known that gamma irradiation has been successfully employed in the modification/sterilization of such porous composites and that it has advantages over other procedures. In this study, differential scanning calorimetry (DSC) measurements were made to investigate the influence of the radiation on glass transition behavior and structural relaxation, as well as to estimate the activation energy for this process. The apparent activation energy Delta H* for structural relaxation in the glass transition region was determined on the basis of the heating rate dependence of the glass transition temperature T-g. Furthermore, the results were correlated with those obtained by gel permeation chromatography (GPC). Our findings support the fact that the radiation-induced chain scission in the PLLA phase is the main reason for the decrease of the glass transition temperature and/or activation energy with the absorbed dose. PB - Trans Tech Publications, Ltd. C3 - Research Trends in Contemporary Materials Science T1 - The influence of gamma radiation on the glass transition of hydroxyapatite/poly L-lactide composite SP - 497 EP - 502 VL - 555 DO - 10.4028/www.scientific.net/MSF.555.497 UR - https://hdl.handle.net/21.15107/rcub_dais_2754 ER -
@conference{ author = "Milićević, Dejan S. and Trifunović, S. and Ignjatović, Nenad and Suljovrujić, Edin H.", year = "2007", abstract = "Hydroxyapatite/poly L-lactide (HAp/PLLA) is a composite biomaterial which has been widely utilized for substitution and reparation of the hard bone tissue. It is well known that gamma irradiation has been successfully employed in the modification/sterilization of such porous composites and that it has advantages over other procedures. In this study, differential scanning calorimetry (DSC) measurements were made to investigate the influence of the radiation on glass transition behavior and structural relaxation, as well as to estimate the activation energy for this process. The apparent activation energy Delta H* for structural relaxation in the glass transition region was determined on the basis of the heating rate dependence of the glass transition temperature T-g. Furthermore, the results were correlated with those obtained by gel permeation chromatography (GPC). Our findings support the fact that the radiation-induced chain scission in the PLLA phase is the main reason for the decrease of the glass transition temperature and/or activation energy with the absorbed dose.", publisher = "Trans Tech Publications, Ltd.", journal = "Research Trends in Contemporary Materials Science", title = "The influence of gamma radiation on the glass transition of hydroxyapatite/poly L-lactide composite", pages = "497-502", volume = "555", doi = "10.4028/www.scientific.net/MSF.555.497", url = "https://hdl.handle.net/21.15107/rcub_dais_2754" }
Milićević, D. S., Trifunović, S., Ignjatović, N.,& Suljovrujić, E. H.. (2007). The influence of gamma radiation on the glass transition of hydroxyapatite/poly L-lactide composite. in Research Trends in Contemporary Materials Science Trans Tech Publications, Ltd.., 555, 497-502. https://doi.org/10.4028/www.scientific.net/MSF.555.497 https://hdl.handle.net/21.15107/rcub_dais_2754
Milićević DS, Trifunović S, Ignjatović N, Suljovrujić EH. The influence of gamma radiation on the glass transition of hydroxyapatite/poly L-lactide composite. in Research Trends in Contemporary Materials Science. 2007;555:497-502. doi:10.4028/www.scientific.net/MSF.555.497 https://hdl.handle.net/21.15107/rcub_dais_2754 .
Milićević, Dejan S., Trifunović, S., Ignjatović, Nenad, Suljovrujić, Edin H., "The influence of gamma radiation on the glass transition of hydroxyapatite/poly L-lactide composite" in Research Trends in Contemporary Materials Science, 555 (2007):497-502, https://doi.org/10.4028/www.scientific.net/MSF.555.497 ., https://hdl.handle.net/21.15107/rcub_dais_2754 .