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Synthesis and characterization of aromatic poly(phosphonate)s, poly(thiophosphonate)s, and poly(selenophosphonate)s for high refractive index

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Abstract

Highly refractive poly(phosphonate)s (BPOP), poly(thiophosphonate)s (BPTP), and poly(selenophosphonate)s (BPSP) with aromatic backbones were prepared by the polycondensation of phosphonic dichlorides and diols. The polymers have high thermal properties including high thermal properties (Td5% > 400 °C), glass transition temperature (Tg = 76 ~ 157 °C), and high optical properties such as transparency at 400 nm of over 80% for films of ca. 10 μm thickness, and a refractive index in the range of 1.633–1.675. In particular, BPSP exhibited a high refractive index (1.675) with low birefringence (0.0025) due to the heavy atom effect of selenium.

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This paper represent synthesis and characterization of highly refractive and transparent poly(phosphonate)s (BPOP), poly(thiophosphonate)s (BPTP), and poly(selenophosphonate)s (BPSP) with aromatic backbones in the polymer chains. The poly(phosphonate)s was prepared by the polycondensation of phosphonic dichlorides and diols. The polymers exhibited high thermal properties such as glass transition temperature (> 76 °C), and 5% weight loss temperature at > 393 °C under nitrogen. The polymers also showed good optical properties, including high optical transparency in the visible region, a low birefringence of 0.0099–0.0026, and high refractive indices of 1.6333–1.6757 at 637 nm.

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Acknowledgements

The work was partly supported by a grant from the Korea Institute of Science and Technology Institutional (KIST) Program and was also supported by the Korea Evaluation Institute of Industrial Technology (KEIT) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (No.20011577 & No. 20011153).

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  1. Carbon Composite Materials Research Center, Institute of Advanced Composite Materials, Korea Institute of Science and Technology (KIST), Jeollabuk-do, 55324, Republic of Korea

    Deok Ryu, Miyeon Lee & Nam-Ho You

  2. Department of Carbon Materials, Chosun University, Gwangju, 61452, Republic of Korea

    Deok Ryu & Honglae Sohn

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Ryu, D., Lee, M., Sohn, H. et al. Synthesis and characterization of aromatic poly(phosphonate)s, poly(thiophosphonate)s, and poly(selenophosphonate)s for high refractive index. Macromol. Res. 31, 583–592 (2023). https://doi.org/10.1007/s13233-023-00140-x

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