Caracterização por espectroscopia raman do polivinil álcool, poliestireno e polimetilmetacrilato puro e modificados com nitrato de érbio.
Raman spectroscopy is a technique that uses monochrome radiation to identify the composition of a molecule and, through this technique, it is possible to identify the characteristics of materials. Thus, this work aims to know the molecular structures of polymers Polymethylmethacrylate (PMMA), Polyvi...
| Autor principal: | FERNANDES, Rosany Andrade |
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| Grau: | Trabalho de Conclusão de Curso - Graduação |
| Publicado em: |
2024
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| Assuntos: | |
| Acesso em linha: |
https://bdm.ufpa.br/jspui/handle/prefix/7036 |
| Resumo: |
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Raman spectroscopy is a technique that uses monochrome radiation to identify the composition of a molecule and, through this technique, it is possible to identify the characteristics of materials. Thus, this work aims to know the molecular structures of polymers Polymethylmethacrylate (PMMA), Polyvinyl Alcohol (PVA) and Polystyrene (PS) pure and modified with Pentahydrated Ebium Nitrate with 5%, 10% and 20% through the technique presented and used the lasers 532nm and 785nm. In the spectrum of PMMA with Erbium Nitrate showed a significant change in the blend with concentration of 20% in the region between 3070 cm-1 to 4290 cm-1. In the PS blends there was no change in vibrational modes in relation to pure PS and PVA blends showed changes in vibrational modes in relation to pure material. |