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Polymerization of 4-biphenyl methacrylate; a kinetic study

✍ Scribed by G.O.R. Alberda van Ekenstein; H.J.H. Altena; Y.Y. Tan

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
318 KB
Volume
25
Category
Article
ISSN
0014-3057

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✦ Synopsis

A~traet--Polymerization of 4-biphenyl methacrylate with AIBN as initiator in DMF follows normal kinetics at 50Β°C. The overall activation parameters, determined by combined isothermal and dynamic thermal analysis, were E a = 58 + 4 kJmol -I and In A = 14.4 + 1.3. Molecular weights,/1~, and h,3,, of the polymers varied between 25 Γ— 103 and 109 x 103 and between 8000 and 32,000, respectively. The microstructure was predominantly syndiotactic and similar to that of poly(phenyl methacrylate); compared with poly(methyl methacrylate), it is more heterotactic and less syndiotactic.

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