coupling reaction

in polymer science
https://doi.org/10.1351/goldbook.15392
Linking of two macromolecules through chemical reaction.
Note: The coupling may proceed with or without interaction with an added coupling agent.
Source:
PAC, 2008, 80, 2163. (Glossary of terms related to kinetics, thermodynamics, and mechanisms of polymerization (IUPAC Recommendations 2008)) on page 2172 [Terms] [Paper]