THEORETICAL-STUDY ON THE LINKING PROCESS OF DIVINYL COMPOUNDS WITH LIVING PRECURSORS .1. UNIFORM PRECURSOR CHAINS

The theoretical aspect of the linking reaction between divinyl compoun ds and uniform living precursors has been studied by using the model o f threads going through the holes of buttons. The expressions of vario us molecular parameters of the clusters formed during the linking proc ess, such as the number- and the weight-average molecular weights, the average degree of branching, the branch distribution function, and th e molecular weight distribution function, were rigorously derived. The critical condition of gelation is given as well. The theoretical resu lts obtained are appropriate to the core formation process for the cor e-first preparation procedure of star-shaped polymers, and to the arm- first approach using a uniform living precursor with low or moderate m olecular size.