| Autor: |
Caminiti, R., Isopo, A., Orru, M. A., Albertini, V. R. |
| Zdroj: |
Chemistry of Materials; February 21, 2000, Vol. 12 Issue: 2 p369-375, 7p |
| Abstrakt: |
An alternative method to DSC, for revealing the thermal dissolution of the phases coexisting in a polymeric sample, is using a structure-sensitive probe, like X-ray diffraction. The problem with this is that it would be necessary to collect many diffraction patterns and to process them using theoretically calculated quantities. Instead, we used a method we developed, which simplifies the experimental procedure in studying phase transitions. It is based on the energy dispersive X-ray Diffraction and results in a curve that represents the evolution of the system under heating. In this paper, we present for the first time a comparison between these two techniques applied to a sample of poly(ethylene-succinate) which shows a multiple melting behavior when subjected to heating. The ability of EDXD applied to phase transitions (PT) to reproduce the complex melting behavior of PES causes one to think that a new tool for these kind of studies, completely independent of DCS, has been found. The potentialities and the merits of EDXD-PT are discussed together with its possible future developments. |
| Databáze: |
Supplemental Index |
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