Elbayoumy Elsayed, El-Ghamaz Nasser A, Mohamed Farid Sh, Diab Mostafa A, Nakano Tamaki
Chemistry Department, Faculty of Science, Damietta University, New Damietta 34517, Egypt.
Physics Department, Faculty of Science, Damietta University, New Damietta 34517, Egypt.
Polymers (Basel). 2021 Sep 5;13(17):3005. doi: 10.3390/polym13173005.
Semiconductor materials based on metal high crosslinked-vinyl polymer composites were prepared through loading of Pd(OAc) 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) composites were studied. The results showed that the loading of polymers with Pd(OAc) led to an increase in the magnitudes of both the dielectric permittivity and AC electrical conductivity (). The value of increased from 1.38 × 10 to 5.84 × 10 S m and from 6.40 × 10 to 2.48 × 10 S m for poly(EDMA) and poly(EDMA-co-MMA), respectively, at 1 MHz and 340 K after loading with Pd(OAc). 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).
通过在聚（1,2 - 二甲基丙烯酸乙二酯）（聚（EDMA））和聚（1,2 - 二甲基丙烯酸乙二酯 - 共 - 甲基丙烯酸甲酯）（聚（EDMA - 共 - MMA））上负载醋酸钯（Pd(OAc)），制备了基于金属高交联乙烯基聚合物复合材料的半导体材料。采用热重分析（TGA）技术研究了聚（EDMA）和聚（EDMA - 共 - MMA）的热化学性质。研究了所有制备的聚合物及其Pd(OAc)复合材料的介电常数、交流电导率和传导机制。结果表明，聚合物负载Pd(OAc)后，介电常数和交流电导率的幅度均有所增加。在1 MHz和340 K下，负载Pd(OAc)后，聚（EDMA）的交流电导率值从1.38×10增加到5.84×10 S m，聚（EDMA - 共 - MMA）的交流电导率值从6.40×10增加到2.48×10 S m。此外，在所有测试频率和300 - 340 K的温度范围内，所有制备的聚合物和复合材料都被视为半导体。此外，所有样品的传导机制似乎可能是量子力学隧穿（QMT）。
