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Estudio de las propiedades fisicoquímicas de macromoléculas sintéticas electroactivasMarmisollé, Waldemar A. January 2011 (has links)
Esta Tesis está dividida en tres partes, cuyo contenido se describe brevemente a continuación.
En la primera parte se realiza un estudio detallado de la voltamperometría de polímeros conductores (Cap. II), teniendo en cuenta la existencia de corrientes capacitivas (Cap. III), y el modelado de la componente faradaica para dar cuenta de la respuesta voltamperométrica total (Cap. IV) antes de arribar al tratamiento de los datos experimentales provenientes de los experimentos de envejecimiento (Cap. II) a la luz del modelo desarrollado (Cap. V).
En la segunda parte de esta Tesis se estudia el proceso de envejecimiento por otras técnicas electroquímicas y espectroelectroquímicas. Estos estudios incluyen el análisis del estado reducido de la polianilina por Espectroscopia de Impedancia Electroquímica (Cap. VI) y los cambios sufridos en los espectros de impedancia durante el envejecimiento. También se estudian las modificaciones espectrales UV-vis a través de medidas de espectrofotometría de absorción con potencial aplicado de películas de distintos polímeros conductores sobre electrodos ópticamente transparentes (Cap. VII). Y, finalmente, se estudian los espectros de emisión de fluorescencia de películas de poli-otoluidina sobre electrodos de Au y sus modificaciones con el potencial aplicado y durante el envejecimiento (Cap. VIII).
La tercera y última parte de esta Tesis se dedica al estudio teórico y experimental del acoplamiento entre los fenómenos de enlace de electrones (rédox) y de enlace de protones (ácido-base) en polímeros electroactivos. Se desarrolla un modelo termodinámico estadístico para tener en cuenta los acoplamientos y se extiende el concepto de enlace a las reacciones rédox (Cap. IX). Finalmente, se presentan resultados experimentales que dan cuenta de la variación de las distribuciones de potenciales formales de polianilina con el pH y su interpretación en términos del modelo (Cap. X). El acoplamiento de enlaces de electrones y de protones también se estudia a través de la titulación ácido-base de polianilina a diferentes potenciales aplicados cuyos resultados se interpretan sobre la base del modelo termodinámico estadístico.
Si bien en cada uno de los capítulos se comentan algunas conclusiones parciales, el Cap. XI está dedicado a las conclusiones más importantes así como también a las posibles perspectivas futuras de este trabajo.
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Green Supply Chain Management in Thailand : An Investigation of the Use in the Electrical and Electronics IndustryWallerius, Joel, Zakrisson, Marcus January 2010 (has links)
<p>The objective with this thesis is to clarify the advantages - both economic and environmental - that companies in the Thai electronic manufacturing industry can draw from managing their supply chain and adding a green aspect to it. This through investigations of the concept known as Green Supply Chain Management (GSCM). The research will assist companies with scarce knowledge of green supply chain management in making decisions and priorities in that area.</p><p>Semi-structured interviews were performed on sight in Bangkok, Thailand and surrounding region. These provided insight and knowledge of the situation and today-state regarding environmental awareness and GSCM implementation within the Thai Electrical and Electronics Industries. Interviews were performed with representatives and experts from different sectors – from universities, industry and supporting agencies and serve as the foundation for the research.</p><p>A model has been developed out of previous research and findings that could suit the Thai industry. This model can be seen as guidelines in the work towards becoming green and aims at continuous improvement of the organizations environmental performance.</p><p>In Thailand today companies do not see the benefits of themselves review their organizations environmental impact or developing in this area. Environmental awareness among the public is low and the lack of demand for green products result in few drivers for companies to become green. Also the lack of proper legislation and compliance audits are part of the problem. Missing environmental education and knowledge are extensive and improvements needed. The concept of GSCM is not wide spread but popularity is increasing steadily. Some environmental initiatives are though performed in the industry but not under the name of the concept. Customer demands, legislation and education should be the main focus areas for developing the industry.</p><p>From the today state at a very basic low much is to be done. Fear of large investments, cost and the lack of knowledge are obstacles to the development. This research shows that these concerns are to be avoided. And by following the model in this thesis companies can find proper knowledge in the area of GSCM. Concluded is that with understanding of the concept and proper implementation from the right knowledge Thai companies can gain great advantages in the future - both economical and environmental.</p>
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Green Supply Chain Management in Thailand : An Investigation of the Use in the Electrical and Electronics IndustryWallerius, Joel, Zakrisson, Marcus January 2010 (has links)
The objective with this thesis is to clarify the advantages - both economic and environmental - that companies in the Thai electronic manufacturing industry can draw from managing their supply chain and adding a green aspect to it. This through investigations of the concept known as Green Supply Chain Management (GSCM). The research will assist companies with scarce knowledge of green supply chain management in making decisions and priorities in that area. Semi-structured interviews were performed on sight in Bangkok, Thailand and surrounding region. These provided insight and knowledge of the situation and today-state regarding environmental awareness and GSCM implementation within the Thai Electrical and Electronics Industries. Interviews were performed with representatives and experts from different sectors – from universities, industry and supporting agencies and serve as the foundation for the research. A model has been developed out of previous research and findings that could suit the Thai industry. This model can be seen as guidelines in the work towards becoming green and aims at continuous improvement of the organizations environmental performance. In Thailand today companies do not see the benefits of themselves review their organizations environmental impact or developing in this area. Environmental awareness among the public is low and the lack of demand for green products result in few drivers for companies to become green. Also the lack of proper legislation and compliance audits are part of the problem. Missing environmental education and knowledge are extensive and improvements needed. The concept of GSCM is not wide spread but popularity is increasing steadily. Some environmental initiatives are though performed in the industry but not under the name of the concept. Customer demands, legislation and education should be the main focus areas for developing the industry. From the today state at a very basic low much is to be done. Fear of large investments, cost and the lack of knowledge are obstacles to the development. This research shows that these concerns are to be avoided. And by following the model in this thesis companies can find proper knowledge in the area of GSCM. Concluded is that with understanding of the concept and proper implementation from the right knowledge Thai companies can gain great advantages in the future - both economical and environmental.
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