Abstract:Non-water reacted polymer materials are new type materials for anti-seepage repairing and supporting, which have advantages of light, early strength, ductile, durable and environment-friendly properties. Therefore they have been widely applied in water disaster prevention of foundation engineering. However polymer materials are usually under dynamic working loads and their viscoelastic properties are very important for dynamic response analysis of polymer composite structures. In this paper, dynamic thermomechanical analysis was firstly used to study the dynamic viscoelastic properties of non-water reacted polymer materials. The moulds for DMA tests of non-water reacted polymer materials were designed and made. The important problems for accurately testing viscoelastic properties of non-water reacted polymer materials were solved. Then frequency and temperature spectra of non-water reacted polymer materials were analyzed and the changing laws of the variation of frequency and density for dynamic viscoelastic properties were studied. Also high and low temperature properties and engineering applicability of polymer materials were researched. Meanwhile the difference of dynamic viscoelastic properties with water or without water was contrasted, the functional relations of storage modulus and loss factor with density and frequency were also obtained. The results show that non-water reacted polymer material is an engineering material with good heatproof and cold resistant abilities. The viscoelasticity of the material is greatly affected by the frequency (greater than 20 Hz) without water, and in water environment is greatly affected by density, which should arouse adequate attention in engineering application.