Premium
Synthesis and characterization studies of homopolymers of N ‐vinylpyrrolidone, vinyl acetate, and their copolymers
Author(s) -
Mathakiya Ismail,
Rakshit Animesh Kumar
Publication year - 1998
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19980404)68:1<91::aid-app10>3.0.co;2-4
Subject(s) - copolymer , polymer chemistry , monomer , vinyl acetate , intrinsic viscosity , activation energy , reactivity (psychology) , n vinylpyrrolidone , materials science , swelling , fourier transform infrared spectroscopy , radical polymerization , viscosity , elemental analysis , polymerization , chemistry , chemical engineering , polymer , organic chemistry , composite material , medicine , alternative medicine , pathology , engineering
Homopolymers of N ‐vinylpyrrolidone (VP) and vinyl acetate (VAc) were synthesized by a free‐radical solution polymerization technique. Copolymers of VP and VAc in various monomer feed ratios were also synthesized by the same procedure. They were characterized by elemental analysis, FTIR, PNMR, TGA, swelling, and viscosity measurements. The reactivity ratios of the monomers were computed by both Fineman–Ross and Kelen–Tudos methods using data from both PNMR and elemental analysis studies. The activation energy values for various stages of decomposition were calculated from TGA analysis using Broido's method. The viscosity measurements were carried out at four different temperatures: 30, 35, 40, and 45°C. The activation parameters of the viscous flow, voluminosity ( V E ), and shape factor (ν) were also computed for all systems. © 1998 John Wiley & Sons, Inc. J Appl Polym Sci 68:91–102, 1998