Reinforced polymer foams, articles and coatings prepared therefrom and methods of making the same

A method of making a reinforced cellular foamed article, comprising the steps of:

• forming a mixture of a precursor for a foamable polymer and a precursor for forming a polymeric reinforcement fiber material;
• forming the polymeric reinforcement fiber material in situ in the presence of the precursor for the foamable polymer, thereby preparing a dispersion comprising the polymeric reinforcement fiber material and the precursor for the foamable polymer;
• processing the polymeric reinforcement fiber material in the presence of the precursor for the foamable polymer so that the polymeric reinforcement fiber material has an average cross sectional diameter of from about 1 to about 500 nm and a volume average length of from about 10 nm to about 10 μm;
• reacting the precursor for the foamable polymer to form a foamable polymer;
• and
• foaming the foamable polymer.