Nonlinear regression by visualization of the sum of residual space applied to the integrated copolymerization equation with errors in all variables. II. Application to the system methyl methacrylate-α-methylene-γ-butyrolactone using on-line Raman spectroscopy

✍ Scribed by Mark Van Den Brink; Wilfred Smulders; Alex M. Van Herk; Anton L. German

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 225 KB
• Volume: 37
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(19991015)37:20<3804::aid-pola9>3.0.co;2-b

✦ Synopsis

The copolymerization of ␣-methylene-␥-butyrolactone and methyl methacrylate in DMSO was studied by on-line Raman spectroscopy. Reactivity ratios for this system were estimated from the in situ conversion measurements. The estimates are in good agreement with estimates obtained from low-conversion experiments where the composition of the copolymer was analyzed by 1 H-NMR. In order to obtain reliable estimates from the Raman data in combination with the integrated copolymerization equation, at least two experiments starting from different initial monomer feed fractions should be conducted.