Copolymers of 4-Nitrophenyl Methacrylate with Styrene : Synthesis, Characteization, and Reactivity Ratios

摘要

Free-radical copolymerization of 4-nitrophenyl methacrylate (NPMA) with styrene (STY) was carried out at 65 deg C in 2-butanone by using benzoyl peroxide (BPO) as initiator. NPMA was characteized by spectral and microelementla analysis. Homo-and copolymers were characterized by IR, ~1H-, and ~13C-NMR studies and their copolymer compositions were evaluated by ~1H-NMR spectroscopic technique. The copolymer reactivity rattios were calculated using Fineman-Ross, Kelen-Tudos, 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 stuided by thermogravimetric analysis and differential scanning calorimetry methods.