A new class of holographic recording constructed by hyperbranched polymers dispersed in photopolymer film

Abstract

We demonstrate a new class of holographic recording constructed by hyperbranched polystyrene (HPS) or poly(ethyl methacrylate) (HPEM) dispersed in methacrylate photopolymers. Hyperbranched polymers behave as hard spheres in monomer and diffuse easily into gel networks without any aggregation. Holographic gratings are constructed by anisotropic distributions of polymer and hyperbranched nanoparticle layers formed by photo-polymerization of methacrylate monomers following phase separation of hyperbranched nanoparticles in the form of interference patterns by irradiation of two laser beams of different phase. High-contrast refractive index changes ( n) with high recording sensitivity and dimensional stability are achieved for the system of HPEM-[2-methylacrylic acid 2-4-[2-(2-methylacryloyloxy)-ethylsulfanylmethyl]-benzylsulfanyl ethyl ester] (UV3000) as methacrylate monomer.

Hyperbranched and Highly Branched Polymer Architectures—Synthetic Strategies and Major Characterization Aspects

“…As further examples, other functional hyperbranched materials are liquid crystalline (see as early example for a suitable AB 2 monomer for LC polyethers Scheme 11, 11-5 68,164 ) 351 and allow holographic recording, 352 have photoactivity 353 or second-order nonlinear optical properties (Scheme 25), 354 exhibit photoluminescence, 355 can be used as photoinitiators, 356 and exhibit shape-memory behavior, e.g., in polyurethane based hb polyesters. 357…”

LED-Cured Reflection Gratings Stored in an Acrylate-Based Photopolymer

“…Although the DE decreases due to the variations of d and Λ, the greater contribution of Δ n causes the final increase of DE after the curing process. In this sense, more studies are necessary to modify the composition of the material by adding other components which produce higher Δ n values [49,50].…”

Novel synthesis of poly(methyl methacrylate) brush encapsulated silica particles

“…DC groups on the surface of the SPS particles were reduced with Bu 3 SnH by radical transfer under 30 min of UV irradiation in a high vacuum (1 wt % SPS particles in THF solution). In previous works, the reduction of DC groups at the peripheral sites of hyperbranched polymers 21 and at the side chain ends of polymer brushes 22 was recognized from the disappearance of ethylene protons (d ¼ 3.68 and 4.00 ppm) of DC groups by 1 H-NMR spectra. The content of DC groups on the surfaces of the SPS particles was measured as follows.…”