in-situ composite formation

Process for preparing a polymer composite by
  1. forming the filler or reinforcement in an existing polymer or
  2. polymerizing monomers in the presence of dispersed filler.
Source:
PAC, 2007, 79, 1801 (Definitions of terms relating to the structure and processing of sols, gels, networks, and inorganic-organic hybrid materials (IUPAC Recommendations 2007)) on page 1823