Sulfur-Containing Poly(meth)acryIates with High Refractive Indices and High Abbe's Numbers

摘要

Four new sulfur-containing monomers consisting of cyclic dithiocarbonate, norbornene, and (meth)-acrylate units were synthesized to develop high refractive index polymers with high Abbe's numbers for optical lenses. A series of poly(meth)acrylates were successfully prepared by the radical polymerization of these monomers. The obtained polymers exhibited a relatively high degradation temperature (5% weight loss) at around 290 °C in both air and nitrogen, while their glass transition temperatures were in the range of 44—109 °C. All the polymer films prepared by spin cast from the polymer solutions exhibited a good transparency in the visible region (wavelengths: 400—800 nm) and high refractive indices in the range of 1.592—1.640 (at 589 nm). with large Abbe's numbers in the range of 40.5—44.5.