Sodium montmorillonite (MMT) was modified by octadecyl trimethyl ammonium chloride (OTAC) via cation exchange to obtain organo-montmorillonite (OMMT), Al₂O₃ was treated by KH-550 (3-Aminopropyltriethoxysilane) to get KH-Al₂O₃. The polyurethane elastomer (PUE) was synthesized with 4,4′-diphenylmethane diisocyanate (MDI), polypropylene glycol (PPG) and 1,4-butanediol (BDO) as the raw materials. And then, OMMT/KH-Al₂O₃/PUE composite was prepared by the prepolymer method; PUE was the matrix, OMMT and KH-Al₂O₃ were reinforcements. The micro-morphology and mechanical properties of OMMT/KH-Al₂O₃/PUE composites were measured and analyzed. The results of FT-IR and XRD showed that OTAC had been introduced into MMT layer and the layer spacing of OMMT had increased. The KH-550 had successfully grafted to the surface of Al₂O₃ to obtain KH-Al₂O₃. The TEM results demonstrated the interaction between OMMT and KH-Al₂O₃, weakening the interaction between the same molecules and the OMMT sheet was further peeled off. The SEM images displayed that a specific ratio of OMMT and KH-Al₂O₃ had excellent dispersion in the PUE matrix. The mechanical properties of OMMT/KH-Al₂O₃/PUE composites were significantly better than those of OMMT/PUE and KH-Al₂O₃/PUE composite. The maximum tensile strength, elongation at break and tensile strength at break are 21.82 MPa, 668% and 19.98 MPa, respectively, which were 43.8%, 29.2% and 36.8% higher than that of PUE matrix, when the content of inorganic components was 3 wt% and the mass rate of OMMT to KH-Al₂O₃ was 1:1. This composite material is a kind of excellent polyurethane elastomer and widely is maybe used in mechanical accessories, pipe, mining and metallurgy industries.

钠蒙脱石（MMT）通过改性十八烷基三甲基氯化铵（OTAC）通过阳离子交换以获得有机蒙脱土，铝₂ ö ₃是由KH-550（3-氨基丙基）处理，以得到KH-Al系₂ ö ₃。以4,4'-二苯基甲烷二异氰酸酯（MDI），聚丙二醇（PPG）和1,4-丁二醇（BDO）为原料合成了聚氨酯弹性体（PUE）。然后，通过预聚物法制备了OMMT / KH-Al ₂ O ₃ / PUE复合材料。PUE是基质，OMMT和KH-Al ₂ O ₃是增强剂。OMMT / KH-Al ₂ O ₃的微观形貌和力学性能/ PUE复合材料进行了测量和分析。FT-IR和XRD结果表明，OTAC已引入MMT层，OMMT的层间距增加。KH-550成功地接枝到Al ₂ O ₃的表面上以获得KH-Al ₂ O ₃。TEM结果表明，OMMT与KH-Al ₂ O ₃相互作用，削弱了相同分子之间的相互作用，使OMMT片进一步剥离。SEM图像显示特定比例的OMMT和KH-Al ₂ O ₃在PUE基质中具有优异的分散性。OMMT / KH-Al ₂ O ₃的力学性能/ PUE复合材料明显优于OMMT / PUE和KH-Al ₂ O ₃ / PUE复合材料。当无机组分含量为3时，最大抗张强度，断裂伸长率和断裂抗张强度分别为21.82 MPa，668％和19.98 MPa，分别比PUE基体高43.8％，29.2％和36.8％。 OMMT对KH-Al ₂ O ₃的质量比为1：1。这种复合材料是一种优良的聚氨酯弹性体，可广泛用于机械配件，管道，采矿和冶金行业。