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Abstract  

The thermal behavior of different synthesized polypyrrole (Ppy) composites was studied in order to obtain quantitative information about the synthesis process and qualitative information about thermal stability of composites. An inorganic anion has been used as dopant (PW12O40 3−), and this has allowed obtaining a complete analysis of Ppy degradation process, since this anion does not degrade in the range of temperature used. In order to validate the quantitative information obtained by thermogravimetric analysis (TG), the work was completed with X-ray photoelectron spectroscopy (XPS) study, since the use of the N+/N or W/N ratios are useful to measure the doping level reached by the synthesis process. Also pyrolysis/gas chromatography/mass spectrometry (py–GC–MS) and differential scanning calorimetry (DSC) were used to obtain information of the products generated as a consequence of the degradation process. FTIR-ATR has been used to characterize Ppy powders.

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Journal of Radioanalytical and Nuclear Chemistry
Authors:
I. Gonçalves
,
A. Ramalho
,
J. Salgado
,
J. Pertusa
,
A. Irles
,
F. Mascarenhas
,
M. Castro
,
F. Valle
,
J. Rico
, and
V. Alcober

Abstract  

The goal of this work is to pursue the research activity in BNC and the installation of a therapy facility in the position presently occupied by the thermal column. With these objectives the experimental studies in mice and cells are continuing while improvements in the facilities are created or prepared. For this effect: (1) the installation of lead shield in the vertical access of the thermal column, which resulted in an enhancement of the Φ th toD γ ratio, was performed, (2) the adaptation of a beam tube to deliver a dominantly thermal or epithermal beam in two possible beam openings is being done and (3) Monte Carlo calculations aiming at the optimization of the conditions for the therapy installation are in progress.

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