Abstract
Abstract Climate change makes it imperative to use materials with minimum global warming potential. The fourth-generation blowing agent HCFO-1233zd-E is one of them. The use of HCFO allows the production of polyurethane foam with low thermal conductivity. Thermal conductivity, like other foam properties, depends not only on the density but also on the cellular structure of the foam. The cellular structure, in turn, depends on the technological parameters of foam production. A comparison of pouring and spray foams of the same low density has shown that the cellular structure of spray foam consists of cells with much less sizes than pouring foam. Due to the small size of cells, spray foam has a lower radiative constituent in the foam conductivity and, as a result, a lower overall thermal conductivity than pouring foam. The water absorption of spray foam, due to the fine cellular structure, also is lower than that of pouring foam. Pouring foam with bigger cells has higher compressive strength and modulus of elasticity in the foam rise direction. On the contrary, spray foam with a fine cellular structure has higher strength and modulus in the perpendicular direction. The effect of foam aging on thermal conductivity was also studied.
Highlights
Climate change makes it imperative to use materials with minimum global warming potential
The aim of this study was to assess the influence of the technology of foam production on its cellular structure, as well as the physical and mechanical properties of the PUR foam made with the fourth-generation blowing agent
BASF polyether and polyester polyols, diethylene glycol as chain extender, IXOL B 251 (Solvay Fluor GmbH, Germany) as reactive flame retardant, and additive flame retardant TCPP (tris-(1-chloro-2-propyl) phosphate) (Albemarle GmbH, Germany), the surfactant Silicone L-6915LV (Momentive Performance Materials, Germany), and bismuth-based catalyst were used in the basic polyol mixture (Table 1)
Summary
Abstract: Climate change makes it imperative to use materials with minimum global warming potential. The use of HCFO allows the production of polyurethane foam with low thermal conductivity. Thermal conductivity, like other foam properties, depends on the density and on the cellular structure of the foam. A comparison of pouring and spray foams of the same low density has shown that the cellular structure of spray foam consists of cells with much less sizes than pouring foam. Due to the small size of cells, spray foam has a lower radiative constituent in the foam conductivity and, as a result, a lower overall thermal conductivity than pouring foam. Pouring foam with bigger cells has higher compressive strength and modulus of elasticity in the foam rise direction. Spray foam with a fine cellular structure has higher strength and modulus in the perpendicular direction. The effect of foam aging on thermal conductivity was studied
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
