Abstract

Infrared spectra of oligomers formed during solid-state polymerization of formaldehyde at 77 K and subsequent warm-up to 150 K have been analyzed with the use of Simple Interactive Self-Modeling Multivariate Analysis (SIMPLISMA). Two pure spectral components, corresponding roughly to "short"- and "long"-chain oligomers, were extracted from the data along with their associated infrared spectra. The cutoff length that separates the two types of oligomers has been determined to be about 20 monomer units. This value is calculated within the context of a statistical model of solid-state polymerization in which chain length distributions are governed largely by spatial and orientational disorder of molecules in lattice sites adjacent to the growing end of each polymer chain. The cutoff length is observed to be essentially constant during thermal annealing cycles in which chain growth takes place, lending support to the validity of the model.

Proton-transfer lasers from solid polymeric chains with covalently bound 2-(2′-hydroxyphenyl)benzimidazole groups

M. L. Ferrer, A. U. Acuñna, F. Amat-Guerri, A. Costela, J. M. Figuera, F. Florido, and R. Sastre
Appl. Opt. 33(12) 2266-2272 (1994)

Improvement of the spatial frequency response of photopolymer materials by modifying polymer chain length

Michael R. Gleeson, Dusan Sabol, Shui Liu, Ciara E. Close, John V. Kelly, and John T. Sheridan
J. Opt. Soc. Am. B 25(3) 396-406 (2008)

Dye photodestruction in a solid-state dye laser with a polymeric gain medium

Sergei Popov
Appl. Opt. 37(27) 6449-6455 (1998)

Holographic photopolymer materials: nonlocal polymerization-driven diffusion under nonideal kinetic conditions

John V. Kelly, Feidhlim T. O'Neill, John T. Sheridan, Cristian Neipp, Sergi Gallego, and Manuel Ortuno
J. Opt. Soc. Am. B 22(2) 407-416 (2005)

Identification of pure component spectra by independent component analysis in glucose prediction based on mid-infrared spectroscopy

Sangjoon Hahn and Gilwon Yoon
Appl. Opt. 45(32) 8374-8380 (2006)