Precursor compositions for a protective article, protective articles comprising a reaction product of the precursor composition, related aerospace structures, and related methods

A protective article, comprising:

• a foamed protective material comprising a reaction product of an acrylic ethylene monomer (AEM), expanded microspheres, and one or more of a strengthening additive, a thermal ablation additive, or an absorption additive, wherein the foamed protective material exhibits a density of from about 0.1 g/ml to about 1.0 g/ml.

A method of forming a protective article, comprising:

• forming a precursor composition comprising an acrylic ethylene monomer (AEM), a foaming agent comprising expandable microspheres, and one or more additives;
• and
• exposing the precursor composition to heat to form a foamed protective article.

An aerospace structure comprising:

• a protective article on at least a portion of an external surface of an aerospace structure, the protective article comprising a foamed protective material comprising a reaction product of an acrylic ethylene monomer (AEM), expanded microspheres, and one or more additives.