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The simplest mathematical model of the process of the thermal dehydrochlorination of poly(vinyl chloride)

✍ Scribed by B.B. Troitskii; V.A. Dozorov; F.F. Minchuk; L.S. Troitskaya

Publisher
Elsevier Science
Year
1975
Tongue
English
Weight
306 KB
Volume
11
Category
Article
ISSN
0014-3057

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✦ Synopsis

The dehydrochlorination of PVC under vacuum (~ 10 -4 mm Hg), with continuous removal of volatile products by freezing out, has been studied at 180-250. The equation has been deduced and solved to describe the thermal degradation of PVC. The rate constants of separate steps of polymer deh~ drochlorination and the dependence of concentrations of polyenes on time of degradation are calculated. * Mean square deviation. 277

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## Abstract A set of poly(vinyl chloride) samples were investigated with respect to their thermal stability. The dehydrochlorination rates were measured in nitrogen at 190Β°C by use of a very accurate, conductometric method. For all polymers studied, a significant molecular weight increase was obser