Poly(vinyl chloride) (PVC)/acrylonitrile–butadiene rubber (NBR) were mixed with multiwalled carbon nanotubes (MWCNTs) and silicon carbide (SiC) to prepare microwave‐absorbing composites. The complex permittivity, direct‐current (dc) conductivity, microwave‐absorbing performance, morphology, and mechanical properties of the composites were studied. The real and imaginary parts of the permittivity of the composites increased with increasing MWCNT content. The premixing of the MWCNTs with PVC was more beneficial to the dispersion of MWCNTs; this led to a higher dc conductivity and permittivity and better microwave‐absorbing performance than the premixing of MWCNTs with NBR for the PVC/NBR/MWCNT composites. The PVC/NBR/MWCNT composites had a minimum reflection loss (RL_min) of −49.5 dB at the optimum thickness of 1.96 mm. The efficient microwave absorption of the PVC/NBR/MWCNT composites was due to a high dielectric loss and moderate permittivity. The incorporation of SiC into the PVC/NBR/MWCNT composites increased the real and imaginary parts of permittivity of the composites. When the SiC content was 70 phr, RL_min decreased to −34.9 dB at a thickness of 3 mm. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

中文翻译：

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填充多壁碳纳米管和碳化硅的聚氯乙烯/丙烯腈-丁二烯橡胶热塑性弹性体的吸波性能和力学性能

将聚氯乙烯（PVC）/丙烯腈-丁二烯橡胶（NBR）与多壁碳纳米管（MWCNT）和碳化硅（SiC）混合以制备吸收微波的复合材料。研究了复合材料的复介电常数，直流电导率，微波吸收性能，形貌和力学性能。复合材料的介电常数的实部和虚部随MWCNT含量的增加而增加。MWCNTs与PVC的预混合更有利于MWCNTs的分散。与将MWCNT与NBR预混合用于PVC / NBR / MWCNT复合材料相比，这导致更高的直流电导率和介电常数以及更好的微波吸收性能。PVC / NBR / MWCNT复合材料的反射损失最小（RL _min-1.96 mm的最佳厚度时为-49.5 dB）。PVC / NBR / MWCNT复合材料的有效微波吸收是由于高介电损耗和中等介电常数。将SiC掺入PVC / NBR / MWCNT复合材料中，可以增加复合材料介电常数的实部和虚部。当SiC含量为70份时，RL_分钟以厚度为3mm降低至-34.9分贝。©2013 Wiley Periodicals，Inc. J. Appl。Polym。科学，2013年