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The molecular chain structure has great influence on the electrical insulation properties of silicone rubber. In this paper, the regularity and mechanism of the blending of different ratios and types of blended silicone rubber on the electrical properties of composite silicone rubber were explored through a combination of experiments and molecular simulations. The results show that the electric strength of phenyl silicone rubber/vinyl blended silicone rubber (PMVQ/MVQ) improves significantly, when the mass fraction of PMVQ is 15%, the volume resistivity of PMVQ/MVQ composite is 1.04×1016 Ω·cm, and the electric strength is 106.87 kV/mm, which increase by 1.77 times and 13.22% than that of the vinyl silicone rubber. The dielectric properties of trifluoropropyl silicone rubber/vinyl blended silicone rubber (FMVQ/MVQ) improves, when the mass fraction of trifluoropropyl silicone rubber is 15%, the dielectric constant of FMVQ/MVQ composite is 3.74, which is 40.07% higher than that of vinyl silicone rubber. Molecular simulation results show that the free volume of PMVQ/MVQ decreases with the increase of phenyl silicone rubber content, and the free volume of FMVQ/MVQ increases with the increase of trifluoropropyl silicone rubber content, which is consistent with the breakdown phenomenon of composite silicone rubber.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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