Interlocking of polymer chains in a polymer material forming a transient or permanent @NT07562@ 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 [Terms] [Paper]