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TitleThermal analysis evaluation of mechanical properties changes promoted by gamma radiation on surgical polymeric textiles
Author(s)Abreu, Maria José Araújo Marques
Silva, Maria Elisabete
Ferreira, L. M.
Oliveira, Carlos
Casimiro, Miguel
Coelho, Alexandra
KeywordsPolymeric surgical textiles
Thermal analysis
Issue date2002
JournalNuclear Instruments & Methods in Physics Research Section B-Beam Interactions With Materials and Atoms
Citation"Nuclear instruments and methods in physics research B". ISSN 0168-58X. 191 (2002) 675-679
Abstract(s)The large number of surgical operations with pos-operative infection problems and the appearing of new infectious diseases, contribute to the development of new materials in order to answer the needs of health care services. This development must take into account the modifications promoted by sterilisation methods in materials, namely by gamma radiation. The Differential Scanning Calorimetry (DSC) and Thermogravimetry (TGA) techniques show that a nonwoven and a laminate textiles maintain a good molecular cohesion, do not showing high levels of degradation, for gamma radiation dose values lower than 100 kGy in nonwoven and 200 kGy in laminate materials. The tensile strength and the elongation decrease slowly for the nonwoven textile and decrease faster for the laminate textile for 25 and 80 kGy absorbed dose. This paper shows that the DSC and TGA techniques can be helpful for the prevision of mechanical changes occurred in the materials as a consequence of the gamma irradiation.
AccessOpen access
Appears in Collections:DET/2C2T - Artigos em revistas internacionais com arbitragem científica

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