Premium
Diffusion and desorption of CO 2 in foamed polystyrene film
Author(s) -
Qian YingHui,
Cao JunMing,
Li XueKun,
Cao GuiPing,
Wang ChangChun,
Shi YunHai
Publication year - 2018
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.45645
Subject(s) - polystyrene , desorption , diffusion , materials science , gravimetric analysis , scanning electron microscope , chemical engineering , fick's laws of diffusion , adsorption , composite material , kinetics , polymer , chemistry , thermodynamics , organic chemistry , physics , quantum mechanics , engineering
Based on the existence of the pores in foamed polystyrene (PS), foamed‐non‐Fickian diffusion (FNFD) model was proposed, for the first time, to regress the desorption data obtained by gravimetric method. Results showed that FNFD model could accurately describe the diffusion behavior of CO 2 out of foamed PS, and well predict the solubility of CO 2 in foamed PS. The characterization of scanning electron microscopy indicated that there were abundant pores in the foamed PS, and the pores store most of CO 2 , which would diffuse in the pores, adsorb to the wall of the pores, penetrate across walls of the pores, diffuse in the matrix of PS, and desorb out of PS. The mass of CO 2 in the pores of foamed PS was expressed as a function of foaming pressure and temperature according to foaming kinetics. Results showed that the values calculated by this function agreed well with the values obtained from the FNFD model. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 45645.