The bulk polymerization of two monomers, 1,3-di(propargyloxy)benzene and 4,4'-diazidomethylbiphenyl, was conducted and a polytriazole was obtained by 1,3-dipolar cycloaddition between these monomers. The structure of the polytriazole was determined by hydrogen nuclear magnetic resonance (¹H NMR). The variation of the functional groups during the polymerization was analyzed by FT-IR. The polymerization kinetics was investigated by differential scanning calorimetry at different heating rates, and the kinetic parameters were obtained by Kissinger and Crane methods: the reaction order 0.92, the apparent activation energy E_a＝79.8 kJ•mol^－1, and the frequency factor A＝1.26×10¹⁰ min^－1. The results showed that the two monomers were easy to form the polytriazole at 80 ℃, which was characterized by gel permeation chromatography (GPC), dynamic mechanical analysis (DMA) and thermogravimetric analysis (TGA). The number average molecular weight of the polytriazole was 4.22×10⁴. The polymer showed good thermal stability. The glass transition temperature of the polymer arrived at 131 ℃. The decomposition temperature (T_d5) of the polymer reached 355 ℃.

Key words: 1,3-dipolar cycloaddition, polymerization kinetics, linear polytrizaole, diazide, dipropargyl compound