화학공학소재연구정보센터
Macromolecular Research, Vol.15, No.6, 533-540, October, 2007
Polarizing Group Attached Acrylates and Polymers Viewing High Refractive Index
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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 (nTE = 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 ℃ and from 329-387 ℃, respectively.
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