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This paper describes novel methods of producing modified isocyanurate foams having low combustibility, high thermal stability and low smoke density. The research philosophy in this study is based on a hypothesis that by increasing the thermal stability of polymeric linkages, less flammable gases...
The overall performance of pentane blown rigid polyurethane foams in terms of insulation value and mechanical properties is demonstrated. The low vapor pressure of both normal-pentane and cyclopentane is shown to induce condensation effects. The consequences of condensation in terms of thermal...
Polyurethane foam of the type used for most refrigerator insulation is currently blown in the United States with a mixture of diclorofluoroethane (R-141b), and CO 2 . The object of this work has been to reduce the thermal conductivity of this foam by passively removing CO 2 from the cell gas of...
For the time being, it is indisputable that the prime blowing agent for rigid polyurethane foams is HCFC-141b. Nevertheless, this transitional substance is already subject to growing political pressure which will lead to restriction of its use early in the 21st century. Additional efforts are...
The commercially available closed-cell cellular plastic insulations are typically faced by gaseous impermeable metal foil to prevent transfer of gases from inside and from outside of the foam. Thus, the long-term aging properties of the foams will be different from the unfaced situation. In this...
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