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Effect of chain transfer agent and the reaction medium on the limiting conversion of methyl methacrylate free radical polymerization

✍ Scribed by E.L. Madruga; J.J. Malfeito

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
291 KB
Volume
28
Category
Article
ISSN
0014-3057

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✦ Synopsis

The kinetics of free radical homopolymerization of methyl methacrylate in the presence of n-dodecyl mercaptan have been studied at 70 in bulk, using a 3 mol/1 solution in benzene. The results indicate that, when the polymerization is carried out in solution, the chain transfer agent does not influence the overall rate of polymerization or the limiting conversion. Also, in bulk polymerization, the presence of n-dodecyl mercaptan does not significantly modify the limiting conversion when polymer is isolated by lyophilization. For the bulk polymerization, the differences in both molecular weight and limiting conversion, when polymers are isolated by lyophilization or by precipitation, have been qualitatively correlated with current theories on free radical polymerization at high conversion.

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