Influence of Polymerization Temperature on Reactivity of 1- and 2.Vinyl Naphthalenes
作者:
C. Bunel,
E. Marechal,
期刊:
Journal of Macromolecular Science: Part A - Chemistry
(Taylor Available online 1981)
卷期:
Volume 16,
issue 3
页码: 637-644
ISSN:0022-233X
年代: 1981
DOI:10.1080/00222338108056811
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Reactivity ratios relative to the copolymerizations of 1-vinyl naphthalene and 2-vinyl naphthalene with styrene have been determined at different specific temperatures. In the case of the system 1-vinyl naphthalene-styrene, the Arrhenius plot exhibits a curve when the temperature is above -50°C. This is explained by the depropagation contribution, The value of the enthalpy of polymerization calculated by using the Lowry relation is in satisfactory agreement with that obtained from calorimetric determinations. From activation enthalpies and entropies it appears that the selection of the two monomers by the cation is entropically controlled for 2-vinyl naphthalene and enthalpically controlled for 1-vinyl naphthalene.
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