branching index

https://doi.org/10.1351/goldbook.B00726
A parameter, g, characterizing the effect of long-chain branches on the size of a branched macromolecule in solution and defined as the ratio of the mean-square
radius of gyration
of a branched molecule, <sb2>, to that of an otherwise identical linear molecule, <sl2>, with the same
relative molecular mass
in the same solvent and at the same temperature, i.e. g=<sb2><sl2>.
Source:
Purple Book, 1st ed., p. 51 [Terms] [Book]