Fiber reinforced polymer (FRP) composites have become promising materials of modern times and find numerous applications in critical engineering fields including aerospace, marine and automobile sector. Due to their increasing demand, it becomes apparently essential to employ advanced techniques, which can predict the long-term behavior of such materials in various in-service conditions. Epoxy and vinyl ester based composites are most commonly used in structural FRP composites. As each polymer has its own advantages and disadvantages, hybridization or blending of different polymers is a trending technology to improve the performance of resulting FRP composite. The present article aims at comparing the performance of glass fiber reinforced epoxy-vinyl ester interpenetrating polymer network (GEVIPN) composite with that of the base materials, i.e. glass fiber reinforced epoxy (GE) and glass fiber reinforced vinyl ester (GVE) composites. Flexural testing has been conducted at various in-situ temperatures (30 °C, 60 °C and 90 °C) where GEVIPN composite showed highest properties at 30 °C. The lifetime prediction of the composite materials has been carried out using accelerated deformation and time-temperature superposition (TTSP) principle. It was observed that GEVIPN composite showed highest creep resistance as compared to the other two composites at lower temperature, whereas opposite trend was observed at elevated temperature. At 30 °C, GEVIPN composite showed positive reinforcement efficiency for ∼385 days with respect to GE and ∼46.27 years with respect to GVE. Similar studies were done for the other reference temperatures. Following this, fractography analysis of the fractured surface was done under FESEM to identify the failure mechanisms and draw a comparison between the composites.

纤维增强聚合物 (FRP) 复合材料已成为现代有前途的材料，并在包括航空航天、船舶和汽车领域在内的关键工程领域得到了广泛应用。由于需求不断增加，显然必须采用先进技术，以预测此类材料在各种使用条件下的长期行为。环氧树脂和乙烯基酯基复合材料最常用于结构 FRP 复合材料。由于每种聚合物都有其自身的优点和缺点，不同聚合物的杂化或共混是提高所得 FRP 复合材料性能的趋势技术。本文旨在比较玻璃纤维增​​强环氧-乙烯基酯互穿聚合物网络（GEVIPN）复合材料与基材的性能，即 玻璃纤维增​​强环氧树脂 (GE) 和玻璃纤维增​​强乙烯基酯 (GVE) 复合材料。在各种原位温度（30 °C、60 °C 和 90 °C）下进行了弯曲测试，其中 GEVIPN 复合材料在 30 °C 时表现出最高的性能。使用加速变形和时间-温度叠加（TTSP）原理进行了复合材料的寿命预测。据观察，与其他两种复合材料相比，GEVIPN 复合材料在较低温度下表现出最高的抗蠕变性，而在升高温度下则观察到相反的趋势。在 30 °C 时，GEVIPN 复合材料对 GE 显示出约 385 天的正增强效率，对 GVE 显示约 46.27 年。对其他参考温度进行了类似的研究。按照此，