Kinetics of diacetylene polymerization: an FT-Raman study

Use of radiochromic film as a high-spatial resolution dosimeter by Raman spectroscopy

“…Raman spectroscopy has been widely used to study the electronic and vibrational structure of polymers. 16 It is based on the inelastic scattering of a monochromatic excitation source by molecules. In Raman scattering, the photon interacts F.…”

“…1,15 In the past decade, Raman spectroscopy has been applied directly to measure the concentration of produced monomers postirradiation as a function of absorbed dose in polymer gels and has been proven to be a useful technique for studying the kinetics of polymerization. 8,16 Recently, Callens et al used Raman and visible-spectroscopy to describe the chromatic properties of Gafchromic™ EBT3 films. 17 The active layer of Gafchromic™ EBT3 film consists of lithium salt of pentacosa-10, 12-diyonic acid (LiPCDA) monomers in ordered form, which on application of UV light or high-energy radiation are polymerized (see also Fig.…”

“…[17][18][19] The phenomenon of monomer to polymer phase transition of diacetylene crystals has been extensively studied using Raman spectroscopy. 16 The objective of this work is to study the variation in the Raman spectra of C==C and C≡ ≡C stretching bands of diacetylene polymer as a function of therapeutic x-ray dosage with spatial resolutions of 200 and 30 µm. Soares proposed that the color producing elements of the film emulsion (chromophores) are approximately 0.75 µm in diameter, which should be considered as the absolute limit of film resolution.…”

A Diacetylene‐Containing Wedge‐Shaped Compound: Synthesis, Morphology, and Photopolymerization

“…Thus, after UV irradiation, a new band appears at 2124 cm À1 , which corresponds to polydiacetylene. [21] Moreover, the frequency shift and intensity increase of the C=C stretching bands at about 1500 cm À1 in the Raman spectrum also indicate conversion of diacetylene to polydiacetylene. [22] The DDABM sample irradiated for 1 h is still soluble in THF, chloroform, and some other organic solvents.…”

The Effect of Hydrogen-Bonds of Amino Acid-Derived Diacetylene by Photopolymerization in Supramolecular Hydrogels

“…4(a)), the vibrational band for the diacetylene group at 1462 cm −1 (v C≡C decreased whereas a new band appeared at 1515 cm −1 , which corresponds to the C C stretching vibration region. [18][19][20] In addition, the peak at 2089 cm −1 (v C≡C was shifted to a higher wavenumber, which is due to increased conjugation. After irradiation for 30 min, the original band almost disappeared at 1462 cm −1 (v C≡C whereas the new band at 1515 cm −1 increased markedly.…”