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- Title
Sensitivity-Enhancing Modified Holographic Photopolymer of PQ/PMMA.
- Authors
Wu, Junhui; Jin, Junchao; Hu, Po; Li, Jinhong; Zeng, Zeyi; Li, Qingdong; Liu, Jie; Chen, Mingyong; Zhang, Zuoyu; Wang, Li; Lin, Xiao; Tan, Xiaodi
- Abstract
Phenanthrenequinone-doped poly(methyl methacrylate) (PQ/PMMA) photopolymers are potential holographic storage media owing to their high-density storage capacities, low costs, high stability, and negligible shrinkage in volume holographic permanent memory. However, because of the limitations of the substrate, conventional Plexiglas materials do not exhibit a good performance in terms of photosensitivity and molding. In this study, the crosslinked structure of PMMA was modified by introducing a dendrimer monomer, pentaerythritol tetraacrylate (PETA), which increases the photosensitivity of the material 2 times (from ~0.58 cm/J to ~1.18 cm/J), and the diffraction efficiency is increased 1.6 times (from ~50% to ~80%). In addition, the modified material has a superior ability to mold compared to conventional materials. Moreover, the holographic performance enhancement was evaluated in conjunction with a quantum chemical analysis. The doping of PETA resulted in an overall decrease in the energy required for the reaction system of the material, and the activation energy decreased by ~0.5 KJ/mol in the photoreaction stage.
- Subjects
PEOPLE for the Ethical Treatment of Animals; DENDRIMERS; ANALYTICAL chemistry; PHOTOSENSITIVITY; ACTIVATION energy; PHOTOPOLYMERS; PENTAERYTHRITOL
- Publication
Polymers (20734360), 2024, Vol 16, Issue 11, p1484
- ISSN
2073-4360
- Publication type
Article
- DOI
10.3390/polym16111484