grafting

in polymer chemistry
https://doi.org/10.1351/goldbook.GT07138
Reaction in which one or more species of @B00682@ are connected to the main chain of a macromolecule as side-chains having constitutional or configurational features that differ from those in the main chain.
Source:
PAC, 2004, 76, 889. (Definitions of terms relating to reactions of polymers and to functional polymeric materials (IUPAC Recommendations 2003)) on page 892 [Terms] [Paper]