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Synthesis of high refractive index polyamides containing thioether unit

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Abstract

Two kinds of aromatic dibenzoyl chloride monomer containing thioether unit 4,4′-Bis(4-chloroformylphenylthio)benzophenone (BP-DC) and 4,4′-thiodibenzoyl chloride (T-DC) were synthesized with two steps, which was reacted with diamine monomer containing thioether and amide unit to prepare a new kind of polyamide containing high quantity thio-ether group. The intrinsic viscosity of the polyamides was 0.76–0.90 dl/g obtained with optimum synthesis conditions. The polymers were found to have good optical properties: the optical transmittance of the aromatic polyamide film at 450 nm is higher than 80%, meantime the high quantity thio-ether unit provided the polymer with a high refractive index ranging from 1.691 to 1.696 and low birefringence of 0.007–0.008. At the same time the polymers had excellent thermal performance with glass transition temperature (Tg) of 226 °C–278 °C, initial degradation temperature (Td) of 427 °C–439 °C. They showed improved solubility in polar aprotic solvents.

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Acknowledgement

This work was supported by research grants from National High Technology Foundation of China (863 program, Grant No.: 2007AA03Z561).

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Authors and Affiliations

  1. Institute of Materials Science & Technology, Sichuan University, Chengdu, 610064, People’s Republic of China

    Gang Zhang, Xiao-jun Wang, Sheng-ru Long & Jie Yang

  2. State Key Laboratory of Polymer Materials Engineering of China, Sichuan University, Chengdu, 610065, People’s Republic of China

    Jie Yang

  3. College of Polymer Materials Science and Engineering of China, Sichuan University, Chengdu, 610065, People’s Republic of China

    Guang-shun Huang

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  1. Gang Zhang
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  2. Guang-shun Huang
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  3. Xiao-jun Wang
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Correspondence to Jie Yang.

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Zhang, G., Huang, Gs., Wang, Xj. et al. Synthesis of high refractive index polyamides containing thioether unit. J Polym Res 18, 1261–1268 (2011). https://doi.org/10.1007/s10965-010-9528-8

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  • DOI: https://doi.org/10.1007/s10965-010-9528-8

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