Rheological analysis of irradiated crosslinkable and scissionable polymers used for medical devices under different radiation conditions
| Autor: | María L. Cerrada, Jorge Aníbal Ressia, Enrique M. Vallés, N. A. Andreucetti, Angel Jose Satti |
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| Přispěvatelé: | Universidad Nacional del Sur, Consejo Nacional de Investigaciones Científicas y Técnicas (Argentina), Universidad de Chile |
| Rok vydání: | 2018 |
| Předmět: |
METALLOCENIC POLYPROPYLENES
Electron beam Materials science ELECTRON BEAM Recubrimientos y Películas Vacuum 02 engineering and technology INGENIERÍAS Y TECNOLOGÍAS macromolecular substances Gamma irradiation Branching (polymer chemistry) 01 natural sciences Metallocenic polypropylenes chemistry.chemical_compound Rheology RHEOLOGY Ingeniería de los Materiales 0103 physical sciences Polymer chemistry Copolymer Irradiation GAMMA IRRADIATION chemistry.chemical_classification Polypropylene Radiation Polydimethylsiloxane 010308 nuclear & particles physics Gamma ray technology industry and agriculture Polymer 021001 nanoscience & nanotechnology purl.org/becyt/ford/2 [https] chemistry Chemical engineering POLYDIMETHYLSILOXANE VACUUM purl.org/becyt/ford/2.5 [https] 0210 nano-technology |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET |
| ISSN: | 0969-806X |
| Popis: | The effects on different synthetic polymers of distinct types of radiation, gamma rays and electron beam, under different atmospheres are followed by changes in their viscoelastic behavior. Taking into account the two main radioinduced reactions, crosslinking and scissioning of polymeric chains, liquid polydimethylsiloxane has been used as example of crosslinkable polymer and semi crystalline polypropylene as example of scissionable polymer. Propylene − 1-hexene copolymers have been also evaluated, and the effects of both reactions were clearly noticed. Accordingly, samples of those aforementioned polymers have been irradiated with Co gamma irradiation in air and under vacuum, and also with electron beam, at similar doses. Sinusoidal dynamic oscillation experiments showed a significant increase in branching and crosslinking reactions when specimens are irradiated under vacuum, while scissioning reactions were observed for the different polymers when irradiation takes place under air with either gamma irradiation or electron beam. We express our gratitude to the Consejo Nacional de Investigaciones Científicas y Técnicas de la República Argentina (CONICET; PIP 112 and PICT 2015-3657), the Universidad Nacional del Sur (UNS, Argentina; PGI 24), CIC, the Universidad de Chile and Project CYTED 311RT0417 for their assistance and financial support for this study. |
| Databáze: | OpenAIRE |
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