Solubility measurements of blowing agents in polyethylene terephthalate

Document Type

Article

Publication Date

7-1-2007

Abstract

The solubility of various blowing agents (BAs) such as CO2, N2, Ar, pentane, isopentane, cyclopentane, butane, hexane, heptane, 1,1-difluoroethane, CO2/N2, and CO2/pentane in polyethylene terephthalate was studied using closed pressure vessels. The experiments were performed at 50-200°C and pressures up to 14 MPa. The solubilities were correlated using the Flory-Huggins equation for HFC and hydrocarbons, and via Henry's law for supercritical gases. In order of decreasing solubility, the BAs rank 1,1-difluoroethane ≤ hydrocarbons ≤ inert gases. Since the Arrhenius type behavior seemed to be able to describe the temperature dependency of the H-values, the solubilities at foaming temperatures can be predicted. © SAGE Publications 2007.

Identifier

34547614770 (Scopus)

Publication Title

Journal of Cellular Plastics

External Full Text Location

https://doi.org/10.1177/0021955X07079071

e-ISSN

15307999

ISSN

0021955X

First Page

345

Last Page

356

Issue

4-5

Volume

43

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