Method of making polymer matrix composites

A method of making a polymer matrix composite comprising a porous polymeric network structure;

• and a plurality of particles distributed within the polymeric network structure, the method comprising:
• combining a thermoplastic polymer, a solvent, and a plurality of thermally conductive particles to provide a slurry;
• forming the slurry into in to an article;
• heating the article in an environment to retain at least 90 percent by weight of the solvent in the article, based on the weight of the solvent in the article, and solubilize at least 50 by weight percent of the thermoplastic polymer, based on the total weight of the thermoplastic polymer;
• and
• inducing phase separation of the thermoplastic polymer from the solvent to provide the polymer matrix composite.