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首页> 外文期刊>Journal of Applied Polymer Science >Copolymerizing behavior and processability of benzoxazine/epoxy systems and their applications for glass fiber composite laminates
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Copolymerizing behavior and processability of benzoxazine/epoxy systems and their applications for glass fiber composite laminates

机译：苯并恶嗪/环氧体系的共聚行为和可加工性及其在玻璃纤维复合材料层压板中的应用

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摘要

Copolymerizing behavior and processability of epoxy/benzoxazine containing cyano groups (EP/BA-ph) systems were investigated by differential scanning calorimetry and dynamic rheological analysis. The results showed that EP/BA-ph systems exhibited two characteristic peaks corresponding to ring-opening of benzoxazine and ring-formation of cyano groups, respectively. Compared with BA-ph, EP/BA-ph copolymer processability was improved and can be controlled by varying EP contents, processing temperature, and time. Then EP/BA-ph copolymers were employed to prepare EP/BA-ph/glass fiber (GF) composite laminates and their mechanical, morphological, and thermal properties were investigated. Compared with those of BA-ph/GF composites, the flexural strength, and modulus of EP/BA-ph/GF composites with 50 wt % EP content were increased by 13.5 and 20%, respectively. The enhancements in mechanical properties are mainly due to the strong interfacial adhesions between GF and matrices, which was confirmed by SEM observations. All EP/BA-ph/GF composite laminates are stable up to 510°C in air. EP/BA-ph/GF laminates will have potential applications in the areas where require of excellent mechanical properties and high temperature resistance.
机译：通过差示扫描量热法和动态流变分析研究了含环氧/苯并恶嗪氰基（EP / BA-ph）体系的共聚行为和可加工性。结果表明，EP / BA-ph体系表现出两个特征峰，分别对应于苯并恶嗪的开环和氰基的成环。与BA-ph相比，EP / BA-ph共聚物的加工性能得到改善，并且可以通过改变EP含量，加工温度和时间来控制。然后，使用EP / BA-ph共聚物制备EP / BA-ph /玻璃纤维（GF）复合层压板，并研究了它们的机械，形态和热性能。与BA-ph / GF复合材料相比，EP含量为50 wt％的EP / BA-ph / GF复合材料的弯曲强度和模量分别增加了13.5和20％。机械性能的提高主要归因于GF与基质之间的牢固界面粘合，这已通过SEM观察得到了证实。所有EP / BA-ph / GF复合材料层压板在空气中最高可保持510°C的温度。 EP / BA-ph / GF层压板将在需要优异机械性能和耐高温性的领域中具有潜在的应用。

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