JOURNAL OF CHILEAN CHEMICAL SOCIETY

Vol 61 No 4 (2016): Journal of the Chilean Chemical Society
Original Research Papers

SYNTHESIS, CHARACTERIZATION, AND GAS TRANSPORT PROPERTIES OF NEW COPOLY(ETHER-AMIDE)S CONTAINING BENZOPHENONE AROMATIC ISOPHTHALIC SEGMENT

José Luis Santiago García
Grupo de Membranas, Unidad de Materiales. Centro de Investigación Científica de Yucatán A.C.
María Isabel Loría Bastarrachea
Grupo de Membranas, Unidad de Materiales. Centro de Investigación Científica de Yucatán A.C.
Julio Sánchez
Departamento de Ciencias del Ambiente, Facultad de Química y Biología, Universidad de Santiago de Chile
Manuel Aguilar Vega
Grupo de Membranas, Unidad de Materiales. Centro de Investigación Científica de Yucatán A.C.
Published December 10, 2016
Keywords
  • Copoly(ether-amide)s,
  • Membranes,
  • Permeability coefficients,
  • Gas separations
How to Cite
Santiago García, J. L., Loría Bastarrachea, M. I., Sánchez, J., & Aguilar Vega, M. (2016). SYNTHESIS, CHARACTERIZATION, AND GAS TRANSPORT PROPERTIES OF NEW COPOLY(ETHER-AMIDE)S CONTAINING BENZOPHENONE AROMATIC ISOPHTHALIC SEGMENT. Journal of the Chilean Chemical Society, 61(4). Retrieved from https://jcchems.com/index.php/JCCHEMS/article/view/122

Abstract

Three new copoly(ether-amide)s based on polyether segments of different molecular weight (average molecular weight 400, 900 and 2000 g/mol) and polyamide segments obtained from 4,4’-diamine benzophenone (DBF) and isophthalic acid (ISO) are reported. The resulting new copoly(ether-amide)s have inherent viscosities ranging of 0.32 to 0.35 dL/g at concentration of 0.5 g/dL, and form dense membranes by solvent casting method. The gas transport properties of the new copoly(ether-amide) membranes for pure gases (He, CO2, O2, CH4, and N2) are studied at different pressures (2.0, 5.0, 7.5, and 10.0 atm) and at different temperatures (35-75 °C). The soft segment of polyether allows an increase in gas permeability coefficients, mainly CO2, in comparison with the values reported for DBFISO aromatic polyamide. However, an increase in polyether segment length decreases the overall permeability coefficients, because the polyether shows a strong tendency to crystallize.

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