✦ LIBER ✦

Reactivity ratios and thermal and dielectric studies of n-butyl methacrylate and methacrylamide copolymers

✍ Scribed by B. Srinivasulu; P. Raghunath Rao; E. V. Sundaram; G. Sathaiah; Lalitha Sirdeshmukh

Publisher: John Wiley and Sons
Year: 1993
Tongue: English
Weight: 380 KB
Volume: 47
Category: Article
ISSN: 0021-8995
DOI: 10.1002/app.1993.070470817

No coin nor oath required. For personal study only.

✦ Synopsis

Free-radical copolymerization of n-butyl methacrylate ( B ) and methacrylamide ( M ) was carried out in the presence of 2,2'-azobisisobutyronitrile ( AIBN ) in dimethyl formamide (DMF) at 60°C. The percentage composition of the copolymers was established by elemental analysis. The reactivity ratios as determined by the Finemann-Ross (F-R) and the Kelen-Tud6s (K-T) methods are rl ( B ) = 2.75 5 0.01, r2 ( M ) = 0.2 f 0.01 and r1 = 2.70 ? 0.05, r2 = 0.19 k 0.02, respectively. The copolymers were characterized by IR, 'H-NMR, thermal, and dielectric studies. Glass transition temperature ( T,) values were determined by DSC. Dielectric studies were carried out to understand the segmental motions and the effect of composition on dielectric loss.

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