Comparison of the precision of estimation of copolymerization reactivity ratios by current methods

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Abstract
Six recently proposed methods for analyzing copolymerization composition data have been compared to a nonlinear least‐squares analysis to ascertain the precision of the six methods in determining reactivity ratios. Data used were simulated for five hypothetical monomer pairs with three different types of experiment design and contained error structures similar to those observed experimentally. The results of the comparisons suggest that retrospective analyses of existing copolymerization data should only be done with a nonlinear least‐squares analysis. For new data, the design of experiments is of great importance, and when done properly allows the use of some of the linear least‐squares methods of analysis.

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