Mössbauer studies of iron doped poly(methyl methacrylate) before and after ion beam modification
| Autor: | D. R. S. Somayajulu, C. N. Murthy, Narendra Patel, Mitesh Sarkar, D. K. Awasthi |
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| Rok vydání: | 2001 |
| Předmět: |
chemistry.chemical_classification
Materials science Double bond Ion beam Inorganic chemistry technology industry and agriculture Polymer Poly(methyl methacrylate) Ion chemistry.chemical_compound chemistry Mechanics of Materials visual_art visual_art.visual_art_medium Physical chemistry General Materials Science Irradiation Methyl methacrylate Glass transition |
| Zdroj: | Scopus-Elsevier |
| ISSN: | 0973-7669 0250-4707 |
| DOI: | 10.1007/bf02708637 |
| Popis: | High-energy MeV ions from accelerators are known to produce drastic modifications in polymers. The typical effects include chain scissions, crosslinks, molecular emission and double bond formation. Poly(methyl methacrylate) was doped with Fe(III) and irradiated with 95 MeV O7+ ions.57Fe-Mossbauer studies were done on the doped samples before and after irradiation. Before irradiation, no Mossbauer absorption was observed. The irradiated samples showed a good Mossbauer absorption, which seems to indicate that there is a significant interaction between the metal ion and the polymer matrix. Two possibilities exist at these doses (∼ 22 × 1012 ions/cm): Fe(III) ions may be bridging the various polymer segments through crosslinking or amorphization of the sample leading to Fe-C bonding. Studies of FTIR, conductivity and glass transition temperatures on these samples support these observations. |
| Databáze: | OpenAIRE |
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