COMPENSATING THE COMPOSITION DRIFT IN REACTIVITY RATIO CALCULATIONS FOR COPOLYMERIZATIONS CARRIED TO HIGH CONVERSIONS

CATALGILGIZ H. H., GIZ A. T.

MACROMOLECULAR CHEMISTRY AND PHYSICS, cilt.195, sa.3, ss.855-864, 1994 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 195 Sayı: 3
  • Basım Tarihi: 1994
  • Doi Numarası: 10.1002/macp.1994.021950304
  • Dergi Adı: MACROMOLECULAR CHEMISTRY AND PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Applied Science & Technology Source, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.855-864
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

The effect of composition drift on the accuracy of linearised methods of determining the reactivity ratios in copolymerization reactions is calculated. It is shown that, when the reactivity ratios differ widely, even at a very low conversion of 5% the drift causes large errors in the ratios found with these methods. However, by using an appropriate average of the initial and the final monomer ratios, the errors due to the composition drift can be significantly reduced, so that linearised methods with averaging can be used with confidence at moderate (30-50%) conversions.