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Polarizing Group Attached Acrylates and Polymers Viewing High Refractive Index
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- Authors
- Ji Yun Kwon, Bong Gun Kim, Jung Yun Do, Jung-Jin Ju, Seung Koo Park
- Issue Date
- 2007-10
- Citation
- Macromolecular Research, v.15, no.6, pp.533-540
- ISSN
- 1598-5032
- Publisher
- 한국고분자학회, Springer
- Language
- English
- Type
- Journal Article
- Project Code
- 07MB2400, Nano flexible opto-electric PCB module for portable display, Ju Jung Jin
- Abstract
- We designed and successfully synthesized UV curable, functional acrylate monomers having a polarizing group, i.e., an electron-withdrawing and/or electron-donating group for the optical materials of high refractive index. Optical polymer films made from the functional methacrylate monomers were achieved with photo crosslinking under UV illumination. A monomer having amino and cyano groups (Dimer-CN) exhibited the highest refractive index (n TE = 1.595 at 850 nm) among the studied methacrylate derivatives, due to the large polarizability of the dipolar monomer structures with electron-donating and withdrawing groups. By controlling the compositions of the functional acrylate monomer of copolymers, the refractive indices of the polymers were readily adjusted within a wide range of 1.498-1.595. The copolymers showed a high glass transition temperature (Tg) and good thermal stability, which are desirable for optical applications. Tg and T10% (10%-weight loss occurred) of the copolymers ranged from 120-140°C and from 329-387°C, respectively.
- KSP Keywords
- 850 nm, Acrylate monomer, Cyano groups, Electron donating group, Electron-withdrawing, Functional methacrylate, Optical applications, Photo-crosslinking, Polymer films, Thermal stability(TGA), UV illumination