Compositions having a matrix and encapsulated phase change materials dispersed therein, and electronic devices assembled therewith

1. A power module assembly comprising:

A power module having at least two surfaces, and

A composition comprising a plurality of encapsulated phase change material particles dispersed within a matrix disposed upon at least a portion of one of the surfaces;

Wherein: the composition further comprises thermally insulating elements, the matrix comprises a pressure sensitive adhesive or an acrylic emulsion, and the encapsulated phase change material has a melting point in the range of about 30° C. to about 100° C.

2. The power module assembly of claim 1 , wherein the surface upon which the composition is disposed is selected from the group consisting of a metallic, metal-coated polymeric, graphite or metal-coated graphitic substrate.

3. The power module assembly of claim 1 , wherein the encapsulated phase change material particles are coated on at least a portion of a surface thereof with a conductive material.

4. The power module assembly of claim 1 , wherein the composition comprises:

about 10 to about 80% by volume of the matrix and

about 20 to about 90% by volume of the encapsulated phase change material particles.