Interlocking of polymer chains in a polymer material forming a transient or permanent network junction over the time-scale of the measurement.
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 1818 (https://doi.org/10.1351/pac200779101801)