✦ LIBER ✦

Copolymers of 4-nitrophenyl methacrylate with styrene: Synthesis, characterization, and reactivity ratios

✍ Scribed by S. Thamizharasi; P. Gnanasundaram; S. Balasubramanian

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 169 KB
Volume: 74
Category: Article
ISSN: 0021-8995
DOI: 10.1002/(sici)1097-4628(19991031)74:5<1186::aid-app15>3.0.co;2-n

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✦ Synopsis

Free-radical copolymerization of 4-nitrophenyl methacrylate (NPMA) with styrene (STY) was carried out at 65°C in 2-butanone by using benzoyl peroxide (BPO) as initiator. NPMA was characterized by spectral and microelemental analysis. Homoand copolymers were characterized by IR, 1 H-, and 13 C-NMR studies and their copolymer compositions were evaluated by 1 H-NMR spectroscopic technique. The copolymer reactivity ratios were calculated using Fineman-Ross, Kelen-Tu ¨dos, and extended Kelen-Tudos methods. The Q,e values for NPMA were determined by Alfrey-Price Q,e rule. Thermal properties of the homo-and copolymers were studied by thermogravimetric analysis and differential scanning calorimetry methods.

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