In order to explore the correlation between the aggregation structure of biaxially oriented polypropylene (BOPP) film and its breakdown property, and promote the localization of BOPP, the properties of four kinds of BOPP samples manufactured at home and abroad were compared by optical observation, X-ray diffraction (XRD), differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), impregnation, and DC breakdown experiments. The results show that the BOPP film with higher crystallinity and higher segment activation energy has a larger electric strength. Impregnating the BOPO film with benzyl toluene can change its aggregation structure and improve the electric strength of electrical weak point. Compared with similar international products, domestic BOPP films show the gap of low electric strength, small shape parameters, and many electrical weak point.
| 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 |