Download e-book for iPad: Copolymerization: Toward a Systematic Approach by Cornel Hagiopol

By Cornel Hagiopol

ISBN-10: 1461368766

ISBN-13: 9781461368762

ISBN-10: 1461541832

ISBN-13: 9781461541837

Copolymerization is a really known business approach, in truth the dominant technique in macromolecular chemistry. With the appearance of common computing strength, this e-book should be very helpful either to educational researchers in copolymerization and to researchers in fascinated with the synthesis of polymers resembling plastics, rubbers, chemical fibers, and paints. A disk with 15 laptop courses accompanies the book.

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Extra resources for Copolymerization: Toward a Systematic Approach

Sample text

Although these methods provide an adequate picture of the process, they are very elaborate and quite often require computer assistance. To facilitate calculation, the Mayo-Lewis equation can be brought to a linear form which makes it easier to apply, including the use of graphic analysis. The use of different estimation methods with a given set of experimental data results in different reactivity ratios. To compare estimation methods based on different variants of the Mayo-Lewis equation, objective criteria are needed so that the reactivity ratios that best represent the copolymerization under study can be established.

23) is replaced by a function of second order in M 10. The graphic method becomes analytic. This approach replaces the subjective character of the KC method and provides better reactivity ratios than those estimated by Kuo and Chen (Fig. 17), but for the copolymerization of vinyl acetate (VAc) and methyl methacrylate it gives a value that lacks physical meaning (rVAc < 0). Even if the method is improved by eliminating the subjective factor, the KC method still leads to results that are less reliable than those obtained by the TM method, and should be used only to find preliminary values of the reactivity ratios.

6) 'I - '2 In the Fineman-Ross (FR) method (M lc/M20 ) (1 - mimi) is plotted against (mimi) Mio/M~o' and'i and '2 are obtained as the slope and the intercept on the abscissa of the straight line, respectively. 9). This is why the method is not fully reliable since it ignores conversion, the great importance of which was already mentioned. Accordingly, it violates one of the principles put forward by Tidweel and Mortimer,56,120 the use of all information the experiment can provide. 6) both contain the copolymer composition.

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Copolymerization: Toward a Systematic Approach by Cornel Hagiopol


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