Abstract

The reaction of an aqueous solution of formaldehyde with gelatin dispersed in a potassium bromide pellet is monitored in real time by FT-IR spectroscopy. Principal component regression analysis of the spectra recorded at different times is carried out. On the whole, the latter results and the observed spectral changes are in agreement with a previously reported interpretation for the kinetics of the crosslinking reaction of gelatin with formaldehyde, according to which the reaction is initialized by the lysine–methylol formation and is subsequently followed by arginine–methylol, which, in turn, reacts with lysine–methylol to originate arginine–lysine crosslinks.

Recent applications of FT-IR spectroscopy to polymer systems

J. L. Koenig and M. K. Antoon
Appl. Opt. 17(9) 1374-1385 (1978)

Thermal-lens study of photochemical reaction kinetics

Nelson G. C. Astrath, Francine B. G. Astrath, Jun Shen, Jianqin Zhou, Kirk H. Michaelian, Craig Fairbridge, Luis C. Malacarne, Paulo R. B. Pedreira, A. N. Medina, and Mauro L. Baesso
Opt. Lett. 34(22) 3460-3462 (2009)

Dark self-enhancement in dichromated-gelatin gratings: a detailed study

Roma Grzymala and Tuula Keinonen
Appl. Opt. 38(35) 7222-7227 (1999)

High resolution spectral measurements in the ν₅ band of formaldehyde using a tunable IR diode laser

David S. Cline and Philip L. Varghese
Appl. Opt. 27(15) 3219-3224 (1988)

Spectroscopic study of Er-doped Ga₂Ge₅S₁₃ glass for mid-IR laser applications

Ei Ei Brown, Zackery D. Fleischman, Jason McKay, Uwe Hommerich, Witold Palosz, Sudhir Trivedi, and Mark Dubinskii
Opt. Mater. Express 12(4) 1627-1637 (2022)