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Considering the application trend of lightweight car body design and the demands for cost reduction, this paper selects metal, CFRP, PC/ABS, PC/PET, PC/PBT, PBT-GF30 as examples, and applies and studies the basic physical properties of sealants and the performance of adhesive strength, substrate matching, aging (thermal aging, damp heat aging, high and low temperature alternation, water resistance, low temperature resistance). The results show that the selected sealant can meet the design requirements except for the poor matching for some plastic substrates (PBT-GF30) at a low temperature of -40 °C. By introducing surface treatment methods such as grinding and plasma, the problem of poor matching of PBT-GF30 in -40 ℃ is solved. Therefore, this paper develops a sealant and process that can adapt to the use of multiple substrates, which can be used in the vehicle design and production.
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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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