Figure 9.
The diagram uses three weighing scales to show curing and foaming relationships. In one case gas expands faster than the polymer network is formed, leading to higher open cell content. In another case curing and foaming occur concurrently, producing a homogeneous cell structure and stabilising cells to some extent. In the final case the network forms faster than gas expands, causing poor cell formation due to high viscosity and higher closed cell content.Impact of curing/foaming equilibrium on properties of the foams