Lightingcure lc8

The crosslinking reaction progress was monitored using a photo-DSC instrument. The instrument setup consisted of a Mettler TOLEDO DSC-1 (Milan, Italy) equipped with a Gas Controller GC100 (Milan, Italy) and a mercury lamp, the Hamamatsu LIGHTINGCURE LC8 (Hamamatsu Photonics (Milan, Italy)), which was used with an optic fibre to focus the radiation.
The UV-light employed was settled at 365 nm wavelength, and the intensity was set to 10% of the maximum intensity, resulting in 10 mW/cm². Samples weighing between 5 to 15 mg were placed in an open aluminum pan, while an empty aluminum pan was used as a reference. All the tests were conducted under a nitrogen flow of 40 mL/min at room temperature (25 °C).
The evaluation method involved the settling of the sample for two minutes, followed by exposure to UV-light for two irradiation steps of ten minutes. The second UV-light exposure was necessary to ensure complete conversion of the groups and to create the baseline. In fact, the second curve was subtracted from the first one to obtain specifically the curve related to the reticulation.
All the data were elaborated by Mettler Toledo STARe software V9.2.

The X‐band EPR spectra were collected in quartz tubes with Elexsys 500 (Bruker) and a MiniScope MS 5000 (Magnettech), both equipped with temperature control. UV irradiation in cavity was provided by an optical fiber from a mercury‐xenon lamp (Hamamatsu Lightingcure LC8, 240–400 nm). Solutions were deoxygenated by prolonged N₂ bubbling in the tube. Radical cations and neutral radicals were generated by adding 10 % CF₃COOH or 10 % ^tBuOO^tBu, respectively, to a 3–10 mM sample solution in benzene. EPR equilibration experiments were performed by mixing the concentrated solutions of the investigated compounds and of the reference phenol (2,6‐di‐tert‐butyl‐4‐methylphenol) with the addition of 10 % ^tBuOO^tBu inside a quartz tube, followed by N₂ bubbling.[²¹ , ^22a (link), ²⁸ (link)] Spectra were analysed by the WinESR program. Measured g‐factors were corrected with respect of 2,2,6,6‐tetramethylpiperidine‐N‐oxyl (TEMPO) radical, g=2.0062,^[30] and that of 2,2‐diphenyl‐1‐picrylhydrazyl (DPPH) radical in benzene, g=2.00364.^[26b] (link)

The crosslinking reaction was followed through a photo-DSC measurement. The instrument was composed by a Mettler TOLEDO DSC-1 equipped with Gas Controller GC100 and a mercury lamp, Hamamatsu LIGHTINGCURE LC8 (Hamamatsu Photonics), used with an optic fiber in order to focalize the radiation.
The wavelength of UV-light was settled at 365 nm, and the intensity was 10% of the maximum intensity, resulting in 100 mW/cm². 5 to 15 mg of samples were placed in an open aluminum pan, and an empty aluminum pan was taken as a reference. All the tests were measured under 40 mL/min of N₂ flow at room temperature (25 °C).
The evaluation method involved the settling of the sample for two minutes and then two expositions to the UV-light of ten minutes each. The second exposition needed to be certain of a total conversion of the group and to create the baseline, in fact, the second curve was subtracted from the first one to obtain only the curve related to the reticulation. All the data were elaborated by Mettler Toledo STARe software V9.2.