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Dielectric Permittivity, AC Electrical Conductivity and Conduction Mechanism of High Crosslinked-Vinyl Polymers and Their Pd(OAc)₂ Composites.

ABSTRACT: Semiconductor materials based on metal high crosslinked-vinyl polymer composites were prepared through loading of Pd(OAc)₂ on both Poly(ethylene-1,2-diyl dimethacrylate) (poly(EDMA)) and poly(ethylene-1,2-diyl dimethacrylate-co-methyl methacrylate) (Poly(EDMA-co-MMA)). The thermochemical properties for both poly(EDMA) and poly(EDMA-co-MMA) were investigated by thermal gravimetric analysis TGA technique. The dielectric permittivity, AC electrical conductivity and conduction mechanism for all the prepared polymers and their Pd(OAc)₂ composites were studied. The results showed that the loading of polymers with Pd(OAc)₂ led to an increase in the magnitudes of both the dielectric permittivity and AC electrical conductivity (σ_ac). The value of σ_ac increased from 1.38 × 10^-5 to 5.84 × 10^-5 S m^-1 and from 6.40 × 10^-6 to 2.48 × 10^-5 S m^-1 for poly(EDMA) and poly(EDMA-co-MMA), respectively, at 1 MHz and 340 K after loading with Pd(OAc)₂. Additionally, all the prepared polymers and composites were considered as semiconductors at all the test frequencies and in the temperature range of 300-340 K. Furthermore, it seems that a conduction mechanism for all the samples could be Quantum Mechanical Tunneling (QMT).

SUBMITTER: Elbayoumy E

PROVIDER: S-EPMC8434503 | biostudies-literature |

REPOSITORIES: biostudies-literature

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