ISSN:
0022-3832
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
New equations for evaluation of resonance (q) and electrical (∊) factors affecting copolymerization have been derived: \documentclass{article}\pagestyle{empty}\begin{document}$ \begin{array}{*{20}c} {r_1 } \hfill & { = \exp \left\{ { - {{\left( {q_1 - q_2 } \right)} \mathord{\left/ {\vphantom {{\left( {q_1 - q_2 } \right)} {RT}}} \right. \kern-\nulldelimiterspace} {RT}}} \right\}\exp \left\{ { - 7.23 \times 10^{20} \varepsilon _1 {{\left( {\varepsilon _1 - \varepsilon _2 } \right)} \mathord{\left/ {\vphantom {{\left( {\varepsilon _1 - \varepsilon _2 } \right)} {RT}}} \right. \kern-\nulldelimiterspace} {RT}}} \right\}} \hfill \\ {r_2 } \hfill & { = \exp \left\{ { - {{\left( {q_2 - q_1 } \right)} \mathord{\left/ {\vphantom {{\left( {q_2 - q_1 } \right)} {RT}}} \right. \kern-\nulldelimiterspace} {RT}}} \right\}\exp \left\{ { - 7.23 \times 10^{20} \varepsilon _2 {{\left( {\varepsilon _2 - \varepsilon _1 } \right)} \mathord{\left/ {\vphantom {{\left( {\varepsilon _2 - \varepsilon _1 } \right)} {RT}}} \right. \kern-\nulldelimiterspace} {RT}}} \right\}} \hfill \\ {r_1 r_2 } \hfill & { = \exp \left\{ { - 7.23 \times 10^{20} {{\left( {\varepsilon _1 - \varepsilon _2 } \right)^2 } \mathord{\left/ {\vphantom {{\left( {\varepsilon _1 - \varepsilon _2 } \right)^2 } {RT}}} \right. \kern-\nulldelimiterspace} {RT}}} \right\}} \hfill \\ \end{array} $\end{document} The new equations will apply over any temperature range, and will express ∊ in terms of e.s.u. and q in kcal./mole. These factors were determined for an extensive list of monomers and were tabulated. Agreement with Hammett σ values and other kinetic and theoretical considerations were found.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1959.1204013715
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