On the determination of monomer reactivities in copolymerization

✍ Scribed by C. Tosi

• Publisher: Elsevier Science
• Year: 1973
• Tongue: English
• Weight: 519 KB
• Volume: 9
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(73)90095-5

✦ Synopsis

Abstraet--Existing methods to determine reactivity ratios in copolymerizations are critically discussed; particular emphasis is placed on the difference between exact and approximate procedures. Among the latter, the "intersection" method (Mayo and Lewis) and the "linearization" method (Fineman and Ross) are still preferred. They are compared from the point of view of projective geometry, and a "duality" is shown to exist between them.

A new procedure, based on the so-called "method of grouping", is then suggested: it allows ready evaluation of reactivity ratios with a minimum of computational difficulties. The results obtained by this procedure are, as such, good estimates for systems reported in the literature without the information necessary for a careful statistical treatment, and may best be used as the starting data for subsequent and more sophisticated elaborations. * Quite analogous considerations could be made for Eqn. (3").