Addition of chlorine and nitrogen dioxide to linear polybutadienes reaction mechanism
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説明
<jats:title>Abstract</jats:title><jats:p>The reaction of chlorine or nitrogen dioxide with polybutadienes consists mainly in their addition to the double bonds of the polymer, but it is often followed by a number of secondary reactions, such as crosslinking and <jats:italic>cis‐trans</jats:italic> isomerization.</jats:p><jats:p>The effects of polymer microstructure, nature of the solvent, solution concentration, temperature, and various additives, are studied. To explain the experimental facts several reaction mechanisms are proposed.</jats:p><jats:p>The chlorination reaction is thought to follow an ionic and radical mechanism simultaneously. The former, which is always predominant, gives only soluble addition products without secondary reactions, whereas the latter can give rise to crosslinked and isomerized products, besides the addition product. Under certain experimental conditions the radical reaction can be avoided and only soluble addition products are obtained.</jats:p><jats:p>The reaction with nitrogen dioxide is predominantly of radical character, and consequently it is always followed by isomerization and crosslinking reactions. Only under special conditions these ancillary reactions can be avoided.</jats:p>
収録刊行物
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- Die Makromolekulare Chemie
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Die Makromolekulare Chemie 168 (1), 41-49, 1973-07
Wiley