Abstract Rare earth oxides (REO = Gd2O3, Dy2O3, Tm2O3) and acrylic acid (AA) were in situ reacted in hydrogenated acrylonitrile–butadiene rubber (HNBR) to prepare HNBR/multi-walled carbon nanotube (MWCNT)/REO/AA composites. The HNBR/MWCNT/REO/AA composites have higher permittivity and dielectric loss than HNBR/MWCNT composite, leading to significantly enhanced microwave absorbing performance of the HNBR/MWCNT/REO/AA composites. Dielectric permittivity analysis reveals that the HNBR/MWCNT/REO/AA composites have longer dielectric relaxation time and higher conductivity than the HNBR/MWCNT composite. The HNBR/MWCNT composite has the minimum reflection loss of −15.1 dB, while the HNBR/MWCNT/REO/AA composites have the minimum reflection loss of −48.8 dB. The improvement of microwave absorbing performance is attributed to the stronger interfacial polarization and higher conductivity after formation of in situ prepared rare earth acrylates.

中文翻译：

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原位制备稀土丙烯酸酯增强氢化丙烯腈-丁二烯橡胶/多壁碳纳米管复合材料的吸波性能

摘要 稀土氧化物（REO = Gd2O3、Dy2O3、Tm2O3）和丙烯酸（AA）在氢化丙烯腈-丁二烯橡胶（HNBR）中原位反应制备HNBR/多壁碳纳米管（MWCNT）/REO/AA复合材料。HNBR/MWCNT/REO/AA复合材料比HNBR/MWCNT复合材料具有更高的介电常数和介电损耗，从而显着提高了HNBR/MWCNT/REO/AA复合材料的微波吸收性能。介电常数分析表明，HNBR/MWCNT/REO/AA 复合材料比 HNBR/MWCNT 复合材料具有更长的介电弛豫时间和更高的电导率。HNBR/MWCNT 复合材料的最小反射损耗为 -15.1 dB，而 HNBR/MWCNT/REO/AA 复合材料的最小反射损耗为 -48.8 dB。