By Cornel Hagiopol
Copolymerization is a truly customary commercial approach, in truth the dominant strategy in macromolecular chemistry. With the appearance of common computing energy, this booklet should be very important either to educational researchers in copolymerization and to researchers in excited by the synthesis of polymers reminiscent of plastics, rubbers, chemical fibers, and paints. A disk with 15 machine courses accompanies the book.
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Additional info for Copolymerization: Toward a Systematic Approach
0, and r l < r2• More obvious cases of differences in values found for reactivity ratios by different methods have been noted. 957). 0) and r l > r 2 , implying that the copolymer composition is increasingly richer in M 1 as compared to the composition of the comonomer mixture that served as a starting point for the copolymerization (Fig. 1). 535). 383), and the r l value has changed so dramatically that r l < r2 (curve 2, Fig. 2). Thus, the huge amount of information on reactivity ratios (taken from polymer science reviews and the Polymer Handbook29 ) raise questions about the ways in which copolymerization processes are studied.
However, a mandatory first step is to characterize the ability of each point to provide a fit of the overall experimental data. 146 for binary copolymerization for n experiments, with m~f as the copolymer composition for the respective experiment calculated with the coordinates of the given intersection point. The smaller the F value, the closer the respective point is to the pair of reactivity ratios that best fit the experimental data as a whole. 7 The intersection points have different capabilities to fit the experimental data.
The importance of the overall experimental error as a sum of the experimental errors arising from the analytical method, the reactivity ratio estimation method, and the conversion. 2. The fact that many experiments have to be considered in order to reach a correct choice of reactivity ratios. We are dealing with the statistical interpretation of experimental data where averaging is mandatory. Under such circumstances, for two reactivity ratios at least five experiments 80 need to be performed. Last but definitely not least, the points at which experimental data are taken needs to be considered.