combination

https://doi.org/10.1351/goldbook.08948
Chain termination, in a chain polymerization, between two propagating macromolecules that gives rise to a single macromolecule of molar mass equal to the sum of the molar masses of the two macromolecules.
Notes:
  1. Combination is often incorrectly called 'recombination'. The term recombination should only be used to refer to the reaction, with each other, of two transient species produced from a common precursor.
  2. Combination is also called colligation, although this terminology is not commonly used in the context of chain polymerization.
Source:
PAC, 2022, 94, 1093. (Terminology for chain polymerization (IUPAC Recommendations 2021)) on page 1119 [Terms] [Paper]