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将联苯结构的双邻苯二甲腈树脂(4,4’-二-3,4-二腈基苯氧基联苯,简称BPH)熔融后与含有苯并恶嗪单元的双邻苯二甲腈树脂(简称BZ-BPH)共混。通过示差扫描量热法(DSC)、流变测试研究了共混树脂的固化工艺性能,通过热重分析(TGA)研究了共混树脂固化物的耐热性能。此外采用SEM观察了浇注样的断面结构。结果表明,通过调节BZ-BPH的加入量可实现对固化工艺的调控。经过240℃/4 h+280℃/4 h+320℃/4 h+375℃/6 h的固化,产物在空气和氮气下5%热失重温度均高于500℃(高于BPH固化物)。BZ-BPH与BPH之间共聚形成了均相的交联网络。
After the biphenylenenitrile resin having a biphenyl structure (4,4’-di-3,4-dinitrobiophenoxybiphenyl, abbreviated as BPH) is melted and fused with the di-ortho-benzenedianiline containing benzoxazine units Acrylonitrile resin (abbreviated as BZ-BPH). The curing process of the blends was studied by DSC and rheological tests. The heat resistance of the blends was studied by thermogravimetric analysis (TGA). In addition, the cast-like cross-sectional structure was observed by SEM. The results show that by adjusting the amount of BZ-BPH curing process can be achieved regulation. The 5% weight loss temperature of the product under both air and nitrogen was higher than 500 ℃ (higher than BPH cured product) after 240 ℃ / 4 h + 280 ℃ / 4 h + 320 ℃ / 4 h + 375 ℃ / 6 h. . The copolymerization between BZ-BPH and BPH forms a homogeneous crosslinked network.