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Synthesis and properties of the optical resin composed of cyclotriphosphazenes

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Abstract

Cyclomatrix polyphosphazenes attract more and more interest because they possess thermal stability and halogen-free flame retardant property. The hexa(Allyl 4-hydroxybenzoate)cyclotriphosphazene is synthesized using hexachlorocyclotriphosphazene (HCTP), 4-hydroxybenzoic acid and allyl alcohol, its structure is confirmed by FTIR, 1H NMR, 13C NMR, 31P NMR and mass spectrometer. Through radical homopolymerization of itself and copolymerization with methyl methacrylate (MMA), a series of optical resins containing cyclotriphosphazene units are obtained. The refractive indices, the visible light transmittance, the density, the water absorption, the thermal and flame-retardant characteristic of the cured resins are studied. Among the tested cured resins, the cyclomatrix homopolymer has the highest refractive index (n d = 1.596), the highest thermal stability (starting decomposed at 337 °C) and the best halogen-free flame-retardant characteristic (limited oxygen index is 34.33% via the 40.03% char yield data at 850 °C by the semi-empirical formula).

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Acknowledgment

This work was supported by the National Natural Science Foundation of China (No. 20374022, 50703013).

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, People’s Republic of China

    Ya-Ni Guo, Chen Zhao, Shu-Zheng Liu, Dong Li, Shu-Jiang Wang, Jin-Jun Qiu & Cheng-Mei Liu

  2. School of Material Science and Engineering, Wuhan Institute of Technology, Wuhan, 430073, People’s Republic of China

    Ya-Ni Guo

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  1. Ya-Ni Guo
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  2. Chen Zhao
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Correspondence to Cheng-Mei Liu.

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Guo, YN., Zhao, C., Liu, SZ. et al. Synthesis and properties of the optical resin composed of cyclotriphosphazenes. Polym. Bull. 62, 421–431 (2009). https://doi.org/10.1007/s00289-008-0035-6

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  • DOI: https://doi.org/10.1007/s00289-008-0035-6

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