Configurational entropy calculation of poly(-alkyl ,L-aspartate)s amorphous and crystalline films using gas permeation Articles uri icon

authors

  • Del Castillo, L.F.
  • Andrio, Andreu
  • Nava, J.A.
  • MOLLÁ ROMANO, SERGIO
  • Muñoz-Guerra, S.
  • COMPAÑ, VICENTE

publication date

  • January 2014

start page

  • 254

end page

  • 261

volume

  • 59

International Standard Serial Number (ISSN)

  • 0014-3057

Electronic International Standard Serial Number (EISSN)

  • 1873-1945

abstract

  • The permeability and diffusion coefficient of gases such as N2, O2 and CO2 through two polymeric membranes of poly(alfa-alkyl beta,L-aspartate)s (PAALA-n) were determined by the "time-lag" method. One of these membranes was crystalline (PAALA-1) and the other one was amorphous (PAALA-6). The comparison of the obtained result for both membranes is addressed by the calculation of the so called configurational entropy. The study has been done in the range of temperatures 20 °C to 70°C. © 2014 Elsevier Ltd. All rights reserved.

keywords

  • amorphous films; carbon dioxide; crystalline materials; diffusion; entropy; mechanical permeability; polymers; amorphous polymers; configurational entropy; crystalline films; crystalline polymers; gas diffusion; gas permeation; time lag