Polyurethane elastomer with main chain containing ferrocene, and preparation method thereof

Abstract

The invention discloses a polyurethane elastomer with the main chain containing ferrocene, and a preparation method thereof. The preparation method comprises the following steps: mixing oligomer diol with diisocyanate to obtain an isocyanate-terminated polyurethane prepolymer; adding ferrocene-containing diol to obtain the polyurethane elastomer with the main chain containing ferrocene; and further carrying out melt coating, brushing, spraying, melt spinning, wet spinning, dry spinning, calendering, impregnation, mold casting and extrusion to realize machine shaping. The highest initial thermal decomposition temperature of the elastomer reaches 342 DEG C, the tensile strength at room temperature is 42.6 MPa, the break elongation at room temperature is 1018%, the elongation at 100 DEG C still can reach 400%, and the polyurethane elastomer with the main chain containing ferrocene is a novel high-performance polyurethane elastomer having good heat tolerance and good mechanical performances, keeps the good processing performances of a polyurethane material, and also has controllable heat tolerance and mechanical performances.

Description

technical field [0001] The invention relates to a polyurethane elastomer material and a preparation method thereof, in particular to a polyurethane elastomer whose main chain contains ferrocene and its preparation. The prepared polyurethane elastomer material not only has excellent heat resistance, elasticity and mechanical strength, but also exhibits certain radiation resistance due to the existence of iron element, and belongs to the technical field of high temperature resistant elastomer materials. Background technique [0002] Polyurethane elastomer is a relatively special category of elastomers. It not only has good oil resistance, wear resistance, corrosion resistance, high elasticity, etc., but also has a wide range of hardness, as low as Shore A10. High impact rubber, up to Shore D90 high-impact elastomer material, the elastic modulus is between 10 and 5000MPa, so the performance range of polyurethane elastomer is extremely wide, and the controllability is strong. Th...

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Problems solved by technology

In 1986, Gonsalves and Rausch first used two ferrocene derivatives as chain extenders to synthesize polyurethanes containing ferrocene in the main chain (see literature: Gonsalves, K. E.; Rausch, M. D. Journal of Polymer Science Part A Polymer Chemistry, 1986 , 24(7), 1599-1607.), its initial decomposition temperature is about 20°C higher than that of butanediol chain-extended polyurethane widely used in industry, but the above two chain extenders are solid at room temperature, only suitable for Using solution polymerization; Najafi-Mohajeri of the Florida Institute of Technology in the United States respectively copolymerized ferrocene homopolymers with hydroxyl and amino groups and isocyanates to obtain two new types of ferrocene-containing polyurethane elastomers, but in terms of thermal stability No obvious improvement has been achieved (see literature: Najafi‐Mohajeri, N.; Nelson, G. L.; Benrashid, R. Journal of Applied Polymer Science, 2000, 76(13), 1847-1856.)

Afterwards, Zhang Wei and others from Inner Mongolia University successfully prepared a polyurethane elastomer containing dinuclear ferrocene in the main chain (Zhang Wei, Wen Guohua, Wu Chunling, Wang Xiaoli, Du Qinghui, Mu Rengeng. [J]. Journal of Inner Mongolia Normal University , 2011, 40(1), 58-61.), after preliminary exploration, it was found that the thermal stability of the film was slightly improved

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