Co-polymers of N-phenyl methacrylamide and glycidyl methacrylate of different compositions were synthesized by free radical solution co-polymerization of the monomers in dimethylformamide using benzoyl peroxide as the initiator at 70 • C. Solubility of the co-polymers was tested in various solvents. The molecular structure of the co-polymers was elucidated by infrared and proton nuclear magnetic resonance spectroscopy. The composition of the co-polymers was determined from their 1 H-NMR spectra by using the intensities of aliphatic and aromatic protons present in the co-polymer. The Finemann-Ross and Kelen-Tüdos models have been employed to determine the reactivity ratios of the monomers. The intrinsic viscosities of the co-polymers of GMA and PMA were determined using a Ubblehode viscometer. The thermal transitions of the co-polymers were determined using differential scanning calorimetry and thermogravimetric analysis.
Free-radical solution copolymerization of Nphenyl methacrylamide and methyl methacrylate in various feed ratios was done using a benzoyl peroxide initiator in N,N-dimethylformamide at 70°C. The structure of the copolymer was elucidated by infrared and proton nuclear magnetic resonance spectroscopy. The copolymer composition was determined from the corresponding 1 H-NMR spectra of the copolymers. Finemann-Ross and Kelen-Tudos methods were used to determine the reactivity ratios of the monomers. The molecular weight distribution of the copolymers was determined using gel permeation chromatography. Thermal properties of the copolymers were determined using differential scanning calorimetry and thermogravimetric analysis (TGA). The activation energy for thermal degradation of the copolymers was determined from the TGA data.
ABSTRACT:The functional monomer, N-phenyl methacrylamide (PMA), was synthesized by reacting methacryloyl chloride with aniline. Free-radical solution copolymerization of PMA and acrylamide (AA) in various feed ratios was synthesized by using benzoyl peroxide initiator in N,N-dimethylformamide at 70• C. Copolymer structure was elucidated by infrared and proton nuclear magnetic resonance spectroscopy. The copolymer composition was determined from the corresponding 1 H NMR spectra of the copolymers. Finemann-Ross and Kelen-Tudos methods were used to determine the reactivity ratios of the monomers. Thermal characterization of the copolymers was carried out using differential scanning calorimetry and thermogravimetric analysis. Thermal stability of the copolymers increases with the increase of
Polymer blends of poly(vinyl acetate) (PVAc) with poly(vinyl chloride) (PVC) and poly(methyl methacrylate) (PMMA) have been prepared by solution blending, and their miscibility has been investigated using physical techniques. Viscosity, density, refractive index, and ultrasonic velocity for blend solutions at different percentages of the blend composition have been measured at 30˚C. The interaction parameters calculated using the viscosity data and the results from physical techniques confirm that the blends PVAc/PMMA and PVAc/PVC are miscible.
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