NEW PHOTOPOLYMER WITH TRIFUNCTIONAL MONOMER FOR HOLOGRAPHIC APPLICATIONS

New holographic recording materials based on photopolymerizable system s have contributed significantly to the recent growth of holographic a pplications. Previously, we reported that in photopolymerizable system s with a difunctional monomer, Ethylene Glycol DiMethAcrylate (EGDMA) improves the behaviour of the system and explains the role played by a n eosin ester that has an oxo-oxime group in the production of amine i nitiator radicals. This comparative study was carried out in our labor atory using differential scanning photocalorimetry and holography. The results of the new photosensitive recording materials for holography indicate that this system can be used for the formulation of very prom ising photopolymers that have a better performance. The aim of this st udy was to change the crosslinking monomer in order to increase the en ergetic sensitivity and discover the rest of the behavior. The new pho topolymerizable mixture contains PentaErythritol TriAcrylate (PETA) in a 1:1 ratio of volume and a 2-Hydroxy-Ethylene MethAcrylate monomer ( HEMA). A diffraction efficiency of 80% is achieved with an energetic s ensitivity of 3 J/cm(2) at 514 nm, and the spatial resolution is up to 2000 lines/mm.