Reactivity ratios of acrylamide-vinyl pyrrolidone copolymerization system obtained by sequential sampling

Akyuz A., Paril A., Giz A.

JOURNAL OF APPLIED POLYMER SCIENCE, vol.100, no.5, pp.3822-3827, 2006 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 100 Issue: 5
  • Publication Date: 2006
  • Doi Number: 10.1002/app.23820
  • Journal Name: JOURNAL OF APPLIED POLYMER SCIENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.3822-3827
  • Istanbul Technical University Affiliated: No

Abstract

Free-radical copolymerization of vinyl pyrrolidone and acrylamide was performed in water at 60 degrees C. Their copolymerization reactions were continued up to high conversions and reaction mixture sampled sequentially during the reaction. The compositions of the aliquots were measured by UV spectroscopy, and their polymer contents were obtained by gravimetry. Data are evaluated by a recent error in variables method developed for sequential sampling. Reactivity ratios are found as r(A) = 2.03 +/- 0.14, r(VP) = 0.09 +/- 0.02. Analysis of the data up to 45% conversion by the Extended Kelen Tudos method gave consistent results. (c) 2006 Wiley Periodicals, Inc. J AppI Polyrn Sci 100: 3822-3827, 2006.