بحث
New Smart Conducting Elastomer Blends of Bi-Based Superconductor Ceramics Nanoparticles Reinforced Natural Rubber/Low-Density Polyethylene for Double Thermistors, Antistatic Protectors, and Electromagnetic Interference Shielding Effectiveness Applications

Farid El-Tantawy, Nadia Abdel Aal, A.A. Al-Ghamdi,3 E.H. El-Mossalamy
 

Abstract

 

A new conducting blend from natural rubber (NR), lowdensity polyethylene (PE), and

Bi-based superconductor (BSCCO) nanoparticles was successfully formulated. Blends

were prepared by means of an open tworoll mill for .ve ratios (100/0, 90/10, 80/20, 70/30, and

60/40 NR/LDPE). The microstructures of the blends were examined in terms of scanning

electron microscopy (SEM), bound rubber (BR), cross-linking density (CLD), and Mooney

viscosity (M100). The mechanical properties like hardness (H) shore A, tensile strength

(TS), and elongation at break (EB) of the blends were studied. The applicability of the

blends as double thermistors, i.e., positive and negative coef.cient of resistivity

(PTCR/NTCR), was examined. The applicability of the blend for antistatic charge

dissipation was also tested. Finally, electromagnetic interference response of conducting

NR/PE-.lled BSCCO in the frequency range 1–12 GHz has been studied. Shielding

effectiveness of the conducting blends in the microwave range 8–12 GHz shows an

attenuation of 44–60 dB for PE _10 wt%.

 






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