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Effect of poly(2-vinylpyridine) as a template for the radical polymerization of methacrylic acid—V: Influence of temperature

✍ Scribed by J. Smid; G.O.R. Alberda van Ekenstein; Y.Y. Tan; G. Challa

Publisher
Elsevier Science
Year
1985
Tongue
English
Weight
418 KB
Volume
21
Category
Article
ISSN
0014-3057

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✦ Synopsis

The influence of temperature on the polymerization of methacrylic acid along atactic and isotactic poly(2-vinylpyridine) templates was studied by means of isothermal and scanning (d.s.c.) calorimetric techniques. The overall energy of activation of both template polymerization systems was about 40 kJ/mol as compared to 80 kJ/mol for the blank. This large difference is caused by a high energy of activation of the cross-termination reaction (50 k J/tool). The apparent energy of activation, obtained from scanning measurements, strongly depended on the scan speed because the steady-state assumption was not valid in the lower temperature region, i.e. the template radical concentration decreases with increasing scan speed causing a rise in the apparent energy of activation.

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