Synthesis of colorless and highly refractive Poly(phenylene thioether ether) derived from 2,7-(4,4′-diphenol)thiothianthrene

Title
Synthesis of colorless and highly refractive Poly(phenylene thioether ether) derived from 2,7-(4,4′-diphenol)thiothianthrene
Authors
구본철유남호고문주남기호오누리김정곤
Keywords
polymer; refractive index; colorless; birefringence
Issue Date
2019-02
Publisher
Polymer
Citation
VOL 165-197
Abstract
Totally colorless, transparent, and highly refractive poly(phenylene thioether ether)s (PPTEs) containing thianthrene-2,7-disulfanyl moiety were developed in this study. A new 4,4′-diol aromatic compound, 2,7-(4,4′-diphenol)thiothianthrene (DPTT), with a high sulfur content was designed and synthesized to develop polymers with high refractive indices and high thermal stabilities. The PPTEs were prepared by polycondensation of DPTT with organic dihalogen compounds, such as 2,6-difluorobenzonitrile (DFBN) and 4,6-dichloro-2-(methylthio)pyrimidine (DCMP). The obtained polymers showed good thermal stabilities such as relatively high glass transition temperatures (Tgs) in the range of 153– 176  °C and 5% weight loss temperatures (T5%) over 344  °C. The cut-off wavelengths (λ0) of the PPTE films are shorter than 343  nm, and they have a transmittance higher than 93% at 550  nm. The combination of the pyrimidine and high sulfur-containing thianthrene derivatives provides the PPTEs with a high refractive index of 1.7204 and a small birefringence of 0.0106  at 637  nm.
URI
http://pubs.kist.re.kr/handle/201004/69037
ISSN
0032-3861
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KIST Publication > Article
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