Macromolecular Research

The Polymer Society of Korea (한국고분자학회)
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Polarizing Group Attached Acrylates and Polymers Viewing High Refractive Index

  • Kwon, Ji-Yun (Department of Advanced Materials for Information and Display, Pusan National University) ;
  • Kim, Bong-Gun (Department of Advanced Materials for Information and Display, Pusan National University) ;
  • Do, Jung-Yun (Department of Advanced Materials for Information and Display, Pusan National University) ;
  • Ju, Jung-Jin (Telecommunication Basic Research Laboratory, ETRI) ;
  • Park, Seung-Koo (Telecommunication Basic Research Laboratory, ETRI)
  • Published : 2007.10.31
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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 850nm) 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 $(T_g)$ and good thermal stability, which are desirable for optical applications. $T_g$ and $T_{10%}$ (10%-weight loss occurred) of the copolymers ranged from $120-140^{\circ}C$ and from $329-387^{\circ}C$, respectively.

Keywords

References

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