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Confecção de fibras de micro-extração em fase sólida (spme) e aplicaçao na determinação de produtos da degradação térmica do poli(propileno)
| Content Provider | Semantic Scholar |
|---|---|
| Author | Bortoluzzi, Janaína Heberle |
| Copyright Year | 2003 |
| Abstract | A promising alternative for methodologies of sample preparation is the solid phase microextraction (SPME), which is a relatively recent technique and that it has been used when there is need to create a link between the sample matrix and the analytical instrument. SPME comes as a technique of samples preparation that spares the use of organic solvents and it presents few stages in its procedure. Materials plastics are used in several sections as in the automobile industry. One of the polymeric ones commonly used in this industry is the poly(propylene) (PP), due to its low price and its versatility, what turns the knowledge of their thermal properties of current interest. The objectives of our work are to make modified fiber glasses covered with poly(butylacrylate) and the study of the products of the thermal degradation of PP through a system SPME-GC-MS. For the accomplishment of the first part of this work, we dipped a modified fiber glass in a solution of poly(butylacrylate), we conditioned this fiber for 300°C for 2 hours and we tested its efficiency through extractions of a mixture of phthalate esters. It took place seven consecutive extractions of this mixture and it was ended that the fiber developed at our laboratory presents repetibility in the extractions, soon after it was concluded through extractions with five different fibers, that our fiber came reproducibility. On the second part it leaves of this work PP was degraded in a tubular oven to a temperature of 470°C and in the exit of this oven it joined a cell to accommodate the fiber of SPME (polydimethylsiloxane and Carboxen) for the concentration of the degradation products of this polymeric one loaded for a carrier gas. The fiber was exposed for 30 min and then it was taken for the hot injector of the gas chromatograph coupled to the masses spectrometry detector. About 55 compounds were identified for both fibers, proving that the products of the degradation of PP are formed by alkanes, alkenes and dyenes. It is ended that the system of SPME-GC-MS is effective and promising for studies of thermal degradation of polymeric. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://repositorio.ufsc.br/xmlui/bitstream/handle/123456789/84873/200243.pdf?isAllowed=y&sequence=1 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
