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To address the problem that it is difficult for high-frequency and high-speed electronic packaging materials to exhibit both high thermal stability properties and low dielectric properties, a novel biobased benzoxazine (M-f) was synthesized from 4-vinylguaiacol and furfurylamine using both solvent and solvent-free methods, and then the benzoxazine monomer was chemically grafted onto polyphenylene oxide oligomer (SA9000) through free radical copolymerization to fabricate a series of IPN resins. The structure, thermal, and dielectric properties of all resins were characterized by Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance spectroscopy (NMR), dynamic thermo-mechanical analysis (DMA), and microwave network analyzer. The results demonstrate that both M-f and M-f/SA9000 IPN resins display relatively high glass transition temperatures (170-245℃), and high frequency low dielectric properties (dielectric constant<3, dielectric loss factor≤0.008) under 5 and 10 GHz, which is satisfied with the requirement of high frequency communications. In particular, the M-f and M-f/SA9000 IPN resins prepared via the solvent-free method exhibit superior high-frequency low dielectric properties compared with the corresponding samples fabricated by the solvent method. Therefore, the work provides a new strategy for the structural design and preparation method of high-performance electronic packaging biomaterials.
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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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