| Autor: |
Moore, D. R., Kaplan, W. A., Tabor, R. L. |
| Zdroj: |
Journal of Cellular Plastics; Sep1995, Vol. 31 Issue 5, p445-455, 11p |
| Abstrakt: |
The decreased emphasis on the use of CFC blowing agents for rigid foam has placed a greater demand on the performance of the polymer in the foam. One area where higher performance is needed is in permeability. In order for non-CFC foam to retain its insulation performance the permeation of low k-factor blowing agent out of the foam and the permeation of high k-factor air into the foam must be minimized.This paper will present data on several new types of polyols which have been designed specifically to give lower permeability than conventional rigid foam polyols. Data on the permeability of both air and carbon dioxide for these polyols was developed on both compression molded thermoset polymer films and foam samples. These polyols gave significant improvement in both carbondioxide retention and air exclusion which lead to improved k-factor aging in the foam samples. [ABSTRACT FROM PUBLISHER] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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