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Abstract

Five polytriazole resins, TAMTMB-BPF, TAMTMB-BPA, TAMTMB-BPK, TAMTMB-BPE, and TAMTMB-BPR, were prepared from 1,3,5-tris(azidomethyl)-2,4,6-trimethylbenzene (TAMTMB) and dipropargyl ethers of hexafluorobisphenol A (BPF), bisphenol A (BPA), 4,4'-dihydroxybenzophenone (BPK), 4,4'-dihydroxydiphenyl ether (BPE), and resorcinol (BPR), respectively. The resins were characterized by Fourier transform infrared spectrometry, differential scanning calorimetry, dynamic mechanical analysis, and thermogravimetric analysis. The results illustrate that the structures of dipropargyl ethers had no obvious effect on the curing behavior of the polytriazole resins and the thermal stability of the cured resins. The polytriazole resins could be cured at 80 °C and further post-cured at higher temperature. The cured resins had a thermal decomposition temperature T _d5 near 360 °C. However, the structural units of the polytriazole resins influenced the glass transition temperature T _g, dielectric properties, and mechanical properties of the cured resins to some extent. The cured TAMTMB-BPF resin had the highest T _g (226 °C) and best dielectric properties among the resins, whereas the cured TAMTMB-BPR resin showed the highest flexural strength of 200.6 MPa.

Keywords

Polytriazole resins structure/property relationship of polytriazoles high performance polytriazoles resins for advanced composites

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Investigation of Structure/property Relationships of Polytriazoles

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