Solubility of hydrofluorocarbon (HFC-134a, HFC-152a) and hydrochlorofluorocarbon (HCFC-142b) blowing agents in polystyrene

Solubilities of blowing agents (HFC‐134a, HCFC‐142b, and HFC‐152a) in polystyrene (PS) were measured at temperatures from 348 to 473 K and pressures up to 3.2 MPa with a volumetric method. For all conditions, the solubility of the blowing agents in PS decreased with increasing temperature. At a give...

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Bibliographic Details
Published in:Polymer engineering and science 2000-06, Vol.40 (6), p.1369-1375
Main Authors: Sato, Yoshiyuki, Iketani, Toru, Takishima, Shigeki, Masuoka, Hirokatsu
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Miscellaneous
Organic polymers
Physicochemistry of polymers
Properties and characterization
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Summary:Solubilities of blowing agents (HFC‐134a, HCFC‐142b, and HFC‐152a) in polystyrene (PS) were measured at temperatures from 348 to 473 K and pressures up to 3.2 MPa with a volumetric method. For all conditions, the solubility of the blowing agents in PS decreased with increasing temperature. At a given temperature and pressure, the solubility of HFC‐134a, HFC‐152a, and HCFC‐142b in PS increased in that order. Solubilities could be correlated with the Sanchez‐Lacombe equation of state with temperature‐dependent binary interaction parameters to within 3.4% average relative percent deviation. The temperature dependence of the Henry's constants, Kp, for the blowing agents were found to have a linear relationship between ln(1/Kp) and (Tc/T)2, where Tc is the critical temperature of the blowing agent.
ISSN:0032-3888
1548-2634
DOI:10.1002/pen.11266