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Dielectric properties of lactams and their significance in the polymerization process

✍ Scribed by M. Provazník; R. Puffr; J. Šebenda

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
345 KB
Volume
24
Category
Article
ISSN
0014-3057

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✦ Synopsis

Abstraet--Lactams form an important and widely investigated group of heterocyclic monomers. Compared with other homologous series of monomers, lactams possess high values of relative permittivity (E), depending on the ring size. Analysis of ~ data in the range of 300-550 K shows that, in lactams containing a cis-amide group, a great change in E occurs during polymerization due to the transformation of cis-associates to trans-associates; this change may lead to changes in the polymerization kinetics and may be employed in direct monitoring of the polymerization.

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