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首页> 外文期刊>RSC Advances >Novel benzimidazole-mediated phthalonitrile/epoxy binary blends system with synergistic curing behavior and outstanding thermal properties
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Novel benzimidazole-mediated phthalonitrile/epoxy binary blends system with synergistic curing behavior and outstanding thermal properties

机译：新型苯并咪唑介导的邻苯二甲腈/环氧二元共混体系，具有协同固化性能和出色的热性能

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Binary blends composed of benzimidazole-containing phthalonitrile (PNBI) and epoxy resin E51 were prepared. The PNBI/E51 (PE) blends showed good compatibilities and unique synergistic curing behaviors on full consumption of nitrile groups (PE19, PNBI:E51 = 1?:?9 in weight ratio) and epoxy groups in the view of DSC, rheology and IR. Curing procedures of the PE blends were determined by DSC and DMA. Studies on the curing procedure showed that the PE blends exhibited good processability and could be fully cured at a temperature lower than 210 °C. Studies on the cured PE blends showed that they have excellent thermal and mechanical properties. The glass transition temperatures (Tg) of cured PNBI/E51 blends were higher than 207 °C (obtained by DMA). The 5% weight loss (T5) and char yield at 800 °C (CR) were higher than 360 °C and 14% in nitrogen, respectively (obtained by TGA). Consequently, this study shows a novel modification in the method for the preparation of epoxy or phthalonitrile blend systems.
机译：制备了由含苯并咪唑的邻苯二甲腈（PNBI）和环氧树脂E51组成的二元共混物。从DSC，流变学和IR的角度来看，PNBI / E51（PE）共混物在充分消耗腈基（PE19，PNBI：E51 = 1？：？9重量比）和环氧基时显示出良好的相容性和独特的协同固化性能。 。 PE共混物的固化程序通过DSC和DMA确定。对固化过程的研究表明，PE共混物表现出良好的加工性能，并且可以在低于210°C的温度下完全固化。对固化的PE共混物的研究表明，它们具有出色的热和机械性能。固化的PNBI / E51共混物的玻璃化转变温度（ T g ）高于207°C（通过DMA获得）。在800°C（CR）时，5％的重量损失（ T 5 ）和焦炭产率分别高于360°C和14％。分别为氮气（通过TGA获得）。因此，这项研究显示了在制备环氧或邻苯二甲腈共混体系的方法上的一种新颖的改进。

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