branching index
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 @[email protected] of a branched molecule, \(< s_{\text{b}}^{2} >\), to that of an otherwise identical linear molecule, \(< s _{\text{l}}^{2} >\), with the same @[email protected] in the same solvent and at the same temperature, i.e. \(g = \frac{< s_{\text{b}}^{2} >}{< s_{\text{l}}^{2} >}\).
Purple Book, 1st ed., p. 51 [Terms] [Book]