| 摘要 |
The present invention provides a hydrogenated styrene thermoplastic elastomer with a unique micro-phase structure and a preparation method therefor. The styrene monomers in a block copolymer have a weight percentage content of 50-80%, and a number-average molecular weight of 50000-300000 g/mol. A micro-phase separation structure in the hydrogenated styrene thermoplastic elastomer with the unique micro-phase structure is very distinctive, and polystyrene exists in a dispersion phase form in a polymer matrix; however, not only does a polystyrene dispersion phase with an average particle size of 400-900 nm exist, but also a polystyrene dispersion phase with the average particle size of 10-95 nm exists. The thermoplastic elastomer has an obvious internal friction peak (tanδ) at -30-50 °C, a peak value of the internal friction peak is -5-10 °C, and the peak value tanδ ≥ 0.3. The thermoplastic elastomer has an optimum fogging effect when being used for producing products such as thin films, wires, sheets and the like; and moreover, the fogging effect is very exquisite, and the hand feeling is dry and comfortable. |
