Figure 9.
(a) Schematic diagram of homogeneous and heterogeneous nucleation during foaming in the presence of a nucleation agent [73] and (b) interfacial tensions of the optimum bubble shape for heterogeneous nucleation.
(a) Schematic diagram of homogeneous and heterogeneous nucleation during foaming in the presence of a nucleation agent [73] and (b) interfacial tensions of the optimum bubble shape for heterogeneous nucleation.