AbstractA method is described which allows the precise estimation of molecular weight distribution parameterspandAwhich pertain to free‐radical polymerizations. Thus, expressions are developed which allow the estimation of (1 −p) by means of a programmable calculator using molecular weight distribution data derived from GPC. Values ofAmay subsequently be calculated by means of a plot of one of the expressions given. Values of (1 −p) andAobtained in this paper were checked using theoretical values as well as by a comparison between calculated and observed values. The agreement between calculated and theoretical or experimental values indicates that the method presented for the estimation of (1 −p) andAis both reliable and relatively rapid. Previously reported methods for the estimation of (1 −p) andAhave involved curve‐fitting trial calculations as well as more precise interpolation procedures. However, the latter are based on single‐peak m
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