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Solubilities of sub‐ and supercritical carbon dioxide in polyester resins
Author(s) -
Nalawade Sameer P.,
Picchioni Francesco,
Janssen Leon P.B.M.,
Patil Vishal E.,
Keurentjes Jos. T.F.,
Staudt Reiner
Publication year - 2006
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.20518
Subject(s) - solubility , polyester , supercritical carbon dioxide , materials science , polymer , supercritical fluid , carbon dioxide , chemical engineering , polymer chemistry , organic chemistry , composite material , chemistry , engineering
In supercritical carbon dioxide (CO 2 ) assisted polymer processes the solubility of CO 2 in a polymer plays a vital role. The higher the amount of CO 2 dissolved in a polymer the higher is the viscosity reduction of the polymer. Solubilities of CO 2 in polyester resins based on propoxylated bisphenol (PPB) and ethoxylated bisphenol (PEB) have been measured using a magnetic suspension balance at temperatures ranging from 333 to 420 K and pressures up to 30 MPa. An optical cell has been used to independently determine the swelling of the polymers, which has been incorporated in the buoyancy correction. In both polyester resins, the solubility of CO 2 increases with increasing pressure and decreasing temperature as a result of variations in CO 2 density. The experimental solubility has been correlated to the Sanchez–Lacombe equation of state. POLYM. ENG. SCI. 46:643–649, 2006. © 2006 Society of Plastics Engineers