Abstract Lanthanum oxide (La2O3), samarium oxide (Sm2O3) and acrylic acid (AA) were in situ reacted in hydrogenated acrylonitrile–butadiene rubber (HNBR) to obtain HNBR/acrylate and HNBR/acrylate/multi-walled carbon nanotubes (MWNTs) composites. Fourier transform infrared spectrum analysis showed the absorption peaks of carbon–carbon double bonds of the acrylates became weak after curing at elevated temperatures, indicating the self-polymerization of acrylates and their participation in crosslinking reactions of HNBR. The morphology of composites was characterized by scanning electron microscopy and X-ray diffraction analysis, and the well dispersion of acrylates was attributed to the in situ reactions during curing. The tensile strength of HNBR/La2O3/AA/MWNTs and HNBR/Sm2O3/AA/MWNTs composites reached 25.2 and 17.6 MPa, and their stress at 100% extension reached 8.4 and 7.4 MPa, indicating the good reinforcement of in situ formed acrylates and MWNTs on HNBR. The glass transition temperature of HNBR increased to a limited extent because of the addition of AA and La2O3. The HNBR/La2O3/AA/MWNTs and HNBR/Sm2O3/AA/MWNTs composites had good microwave absorbing properties, with the maximum reflection loss of −9.0 and −13.5 dB, respectively, and broad absorption bands.

中文翻译：

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原位制备氢化丙烯腈-丁二烯橡胶/稀土丙烯酸酯复合材料的力学和吸波性能

摘要 氧化镧（La2O3）、氧化钐（Sm2O3）和丙烯酸（AA）在氢化丁腈橡胶（HNBR）中原位反应得到HNBR/丙烯酸酯和HNBR/丙烯酸酯/多壁碳纳米管（MWNTs）复合材料. 傅里叶变换红外光谱分析表明，丙烯酸酯在高温固化后碳碳双键的吸收峰变弱，表明丙烯酸酯发生自聚合并参与了氢化丁腈橡胶的交联反应。通过扫描电子显微镜和X射线衍射分析对复合材料的形貌进行了表征，丙烯酸酯的良好分散归因于固化过程中的原位反应。HNBR/La2O3/AA/MWNTs和HNBR/Sm2O3/AA/MWNTs复合材料的抗拉强度分别达到25.2和17.6 MPa，它们在 100% 延伸时的应力分别达到 8.4 和 7.4 MPa，表明原位形成的丙烯酸酯和 MWNTs 在 HNBR 上具有良好的补强效果。由于 AA 和 La2O3 的加入，HNBR 的玻璃化转变温度在一定程度上增加了。HNBR/La2O3/AA/MWNTs和HNBR/Sm2O3/AA/MWNTs复合材料具有良好的微波吸收性能，最大反射损耗分别为-9.0和-13.5 dB，吸收带较宽。