The dynamics of R‐11 blown polyurethane foam formation depend on the rates of viscosity increase of the reacting mixture and R‐11 evaporation, and both are controlled by the polymerization process. Detailed experiments were carried out to study the dynamics of foaming and the measurements made included the cream and rise times, the density change of the expanding foam with time, and the temperature rise during reaction. Dynamic temperature measurements at different points in the foaming mixture were …
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