Reaction that results in an exchange of atoms or groups between a polymer and low-molar-mass
molecules, between polymer molecules, or between sites within the same macromolecule.
Note:
An interchange reaction that occurs with polyesters is called transesterification.
Source:
PAC, 2004, 76, 889
(Definitions of terms relating to reactions of polymers and to functional polymeric
materials (IUPAC Recommendations 2003))
on page 892