Premium
Modification of polystyrene properties by CO 2 : Experimental study and correlation
Author(s) -
Gutiérrez Cristina,
Rodríguez Juan Francisco,
Gracia Ignacio,
de Lucas Antonio,
García M. Teresa
Publication year - 2015
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.41696
Subject(s) - polystyrene , polymer , glass transition , materials science , sorption , plasticizer , viscosity , thermodynamics , work (physics) , thermal diffusivity , polymer chemistry , chemical engineering , surface tension , composite material , chemistry , physics , adsorption , engineering
The sorption of CO 2 in polymers entails their swelling and plasticization whose study is crucial for the design of processes and further applications. The operating conditions during foaming, purification, or impregnation of polymers in CO 2 are mainly determined by the mentioned binary system. In this work, the modification of polystyrene's physical properties (glass transition temperature and viscosity) has been experimentally studied. Since plasticization phenomena are very valuable for the processing of polymers, the amount of CO 2 absorbed into the polymer is related with the changes in the described properties. Furthermore, interfacial tension is also correlated with the sorption of CO 2 from literature data. The proposed correlation fits pretty well the properties shifts in the studied working conditions. Finally, the influence of pressure and temperature on the diffusivity of the CO 2 in the polystyrene is calculated through the measurement of viscosity along time. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41696.