Polyaniline nanofibers as a new gamma radiation stabilizer agent for PMMA
Polyanilines are reported to exhibit stabilizing effects in rubber mixtures submitted to gamma-irradiation and thermo-oxidative treatment. Such abilities may be explained by their action as radical scavengers. Since radical formation followed by main chain scission is a widely accepted mechanism for...
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| Language: | English |
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Budapest University of Technology and Economics
2007-06-01
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| Series: | eXPRESS Polymer Letters |
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| Online Access: | http://www.expresspolymlett.com/letolt.php?file=EPL-0000167&mi=cd |
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| description | Polyanilines are reported to exhibit stabilizing effects in rubber mixtures submitted to gamma-irradiation and thermo-oxidative treatment. Such abilities may be explained by their action as radical scavengers. Since radical formation followed by main chain scission is a widely accepted mechanism for radiolytic degradation of PMMA, polyaniline is a promising additive for commercial plastics submitted to radiosterilization processing. In this work, we investigated the ability of polyaniline emeraldine salt nanofibers (PANF-HCl) in preventing radiation damage on PMMA matrix. Effects of gamma-irradiation on PMMA/PANF-HCl composites films were assessed by comparison of the variation of viscosity-average molar mass (Mv) of PMMA at 25 kGy dose when compared to commercial PMMA films. Samples containing 0.15% PANF-HCl (wt/wt) retained 92% of the initial Mv after irradiation while control sample presented 42% of Mv retention. When exposed to 60-200 kGy doses, PANF-HCl embedded into PMMA matrix preserved their oxidation state but started to exhibit mild deprotonation. PANF-HCl nanofibers were characterized by Diffuse Reflection Infrared Fourier Transform Spectroscopy (DRIFTS) and Scanning Electronic Microscopy (SEM). PMMA/PANF-HCl composites films were characterized by SEM and UV-VIS spectroscopy. |
| format | Article |
| id | doaj-art-1bd81cbf2bc44b4e94b9a08c72c98e20 |
| institution | Matheson Library |
| issn | 1788-618X |
| language | English |
| publishDate | 2007-06-01 |
| publisher | Budapest University of Technology and Economics |
| record_format | Article |
| series | eXPRESS Polymer Letters |
| spelling | doaj-art-1bd81cbf2bc44b4e94b9a08c72c98e202025-07-02T03:19:16ZengBudapest University of Technology and EconomicseXPRESS Polymer Letters1788-618X2007-06-011638539010.3144/expresspolymlett.2007.54Polyaniline nanofibers as a new gamma radiation stabilizer agent for PMMAPolyanilines are reported to exhibit stabilizing effects in rubber mixtures submitted to gamma-irradiation and thermo-oxidative treatment. Such abilities may be explained by their action as radical scavengers. Since radical formation followed by main chain scission is a widely accepted mechanism for radiolytic degradation of PMMA, polyaniline is a promising additive for commercial plastics submitted to radiosterilization processing. In this work, we investigated the ability of polyaniline emeraldine salt nanofibers (PANF-HCl) in preventing radiation damage on PMMA matrix. Effects of gamma-irradiation on PMMA/PANF-HCl composites films were assessed by comparison of the variation of viscosity-average molar mass (Mv) of PMMA at 25 kGy dose when compared to commercial PMMA films. Samples containing 0.15% PANF-HCl (wt/wt) retained 92% of the initial Mv after irradiation while control sample presented 42% of Mv retention. When exposed to 60-200 kGy doses, PANF-HCl embedded into PMMA matrix preserved their oxidation state but started to exhibit mild deprotonation. PANF-HCl nanofibers were characterized by Diffuse Reflection Infrared Fourier Transform Spectroscopy (DRIFTS) and Scanning Electronic Microscopy (SEM). PMMA/PANF-HCl composites films were characterized by SEM and UV-VIS spectroscopy.http://www.expresspolymlett.com/letolt.php?file=EPL-0000167&mi=cdNanomaterialspolyanilinePMMAgamma-irradiationstabilization |
| spellingShingle | Polyaniline nanofibers as a new gamma radiation stabilizer agent for PMMA eXPRESS Polymer Letters Nanomaterials polyaniline PMMA gamma-irradiation stabilization |
| title | Polyaniline nanofibers as a new gamma radiation stabilizer agent for PMMA |
| title_full | Polyaniline nanofibers as a new gamma radiation stabilizer agent for PMMA |
| title_fullStr | Polyaniline nanofibers as a new gamma radiation stabilizer agent for PMMA |
| title_full_unstemmed | Polyaniline nanofibers as a new gamma radiation stabilizer agent for PMMA |
| title_short | Polyaniline nanofibers as a new gamma radiation stabilizer agent for PMMA |
| title_sort | polyaniline nanofibers as a new gamma radiation stabilizer agent for pmma |
| topic | Nanomaterials polyaniline PMMA gamma-irradiation stabilization |
| url | http://www.expresspolymlett.com/letolt.php?file=EPL-0000167&mi=cd |