Macromolecules, Vol.30, No.14, 4112-4116, 1997
Conversion Dependence of the Branching Density for the Polycondensation of Ab(N) Monomers
The distribution function of differently branched molecules resulting from the ideal statistic condensation of AB(2) functional monomers is calculated as a function of the conversion of the A. groups. For these distribution functions the averaged branching parameters DBF = (number of terminal groups + number of dendritic groups)/degree of polymerization and DBHF = number of dendritic groups/maximum number of dendritic groups are calculated. In the more general case of AB(n) polycondensates, equations are given to calculate the weight fraction of branched units directly from the degree of A-group conversion. Additionally, expressions for the polycondensations kinetics are derived, yielding the conversion and the degree of polymerization as a function of time.