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Orientador(es)
Resumo(s)
The surface of poly(butylene terephthalate) (PBT) was analysed by means of inverse gas chromatography (IGC). The
specific component of the adsorption of polar probes on the surface of poly(butylene terephthalate) was found to be
endothermic, and the change in the entropy of the system, positive, which is not a common case in IGC. An interpretation is
given, based on the contribution of cleavage of hydrogen bonds in the PBT and formation of hydrogen bonds between the
probe-molecules and the polymer. The surface Lewis acidity and basicity constants, K and K , respectively, were a b
determined and found to correlate well with an analysis of the repeating unit and end-groups in this polymer.
Descrição
Palavras-chave
Surface characteristics Inverse gas chromatography Acid–base interactions Thermodynamic parameters Polymers; Poly(butylene terephthalate)
Contexto Educativo
Citação
Santos, J.; Guthrie, J.; Fagelman, K. (2002). Characterisation of the surface lewis acid/base properties of poly(butylene terephthalate) by inverse gas chromatography. Journal of Chromatography A. ISSN 0021-9673. 969.1–2, p. 111–118