Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/14293
Título: | A comparison between gravimetric and in-situ spectroscopic methods to measure the sorption of CO₂in a biocompatible polymer |
Autor(es): | Duarte, Ana Rita C. Anderson, L. Duarte, Catarina M. M. Kazarian, S. G. |
Palavras-chave: | CO2 sorption Near-IR spectroscopy ATR-FTIR Polymer swelling |
Data: | 2005 |
Editora: | Elsevier 1 |
Revista: | The Journal of Supercritical Fluids |
Resumo(s): | In situ ATR-IR spectroscopy was used to simultaneously measure the sorption and swelling of carbon dioxide at high pressures in a biocompatible acrylate copolymer poly(methylmethacrylate-co-ethylhexylacrylate-co-ethyleneglycoldimethacrylate), P(MMA–EHA–EGDMA). The ν3 band of CO2 dissolved in the polymer (at 2335 cm−1) was used to calculate the sorption data and the polymer swelling was determined by analyzing the changes in the absorbance of the ν(C O) band (at 1730 cm−1) of the polymer. Transmission spectroscopy in the near-IR region was also used to study the sorption of CO2 in the polymer using combinational and overtone bands. The experiments were carried out in a pressure range of 2.0–12.0MPa and in a temperature range of 27–40 ◦C. The data for CO2 sorption in this polymer obtained by in situ spectroscopic methods have been compared to the data obtained by the gravimetric technique. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/14293 |
ISSN: | 0896-8446 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | 3B’s - Artigos em revistas/Papers in scientific journals |