7 resultados para Luigy Pareyson. Aesthetic. Formativity theory. Interpretation. Metaphysics of figuration
em Universidade do Minho
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Dissertação de mestrado integrado em Psicologia
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Poly(vinylidene fluoride-co-chlorotrifluoroethylene), PVDF-CTFE, membranes were prepared by solven casting from dimethylformamide, DMF. The preparation conditions involved a systematic variation of polymer/solvent ratio and solvent evaporation temperature. The microstructural variations of the PVDF-CTFE membranes depend on the different regions of the PVDF-CTFE/DMF phase diagram, explained by the Flory-Huggins theory. The effect of the polymer/solvent ratio and solvent evaporation temperature on the morphology, degree of porosity, β-phase content, degree of crystallinity, mechanical, dielectric and piezoelectric properties of the PVDF-CTFE polymer were evaluated. In this binary system, the porous microstructure is attributed to a spinodal decomposition of the liquid-liquid phase separation. For a given polymer/solvent ratio, 20 wt%, and higher evaporation solvent temperature, the β-phase content is around 82% and the piezoelectric coefficient, d33, is - 4 pC/N.
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Tese de Doutoramento em Ciências da Literatura (área de especialização em Literatura Portuguesa).
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ISSN:2237-2954
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Tese de Doutoramento em Contabilidade
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Teses de Doutoramento em Arquitectura.
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Dissertação de mestrado em Filosofia Política