Premium
Estimation of molecular weight distribution parameters for free‐radical polymerization
Author(s) -
Reich Leo,
Stivala S. S.
Publication year - 1973
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1973.070171212
Subject(s) - interpolation (computer graphics) , molar mass distribution , plot (graphics) , distribution (mathematics) , radical polymerization , mathematics , calculator , thermodynamics , polymerization , materials science , biological system , chemistry , computer science , statistics , physics , mathematical analysis , polymer , organic chemistry , classical mechanics , operating system , motion (physics) , biology
A method is described which allows the precise estimation of molecular weight distribution parameters p and A which 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 of A may subsequently be calculated by means of a plot of one of the expressions given. Values of (1 − p ) and A obtained 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 ) and A is both reliable and relatively rapid. Previously reported methods for the estimation of (1 − p ) and A have involved curve‐fitting trial calculations as well as more precise interpolation procedures. However, the latter are based on single‐peak maximum values.