Development of Calotropis procera-Glass Fibers Reinforced Epoxy Hybrid Composites: Dynamic Mechanical Properties

ABSTRACT

Effect of hybridization on dynamic mechanical properties of calotropis procera/glass fiber reinforced epoxy hybrid composites was investigated. The hand layup method was used to fabricate composites by varying fiber reinforcement of calotropis procera and glass fiber composition at 5, 10, 15, and 20 wt%. Dynamic mechanical analysis of composites was carried out in the temperature range of 25°C–180°C at the frequency of 1 Hz. Study revealed a marginal shift in glass transition temperature for fiber reinforced composites compared to neat epoxy which indicates the higher temperature resistance of the fiber reinforced composites. The higher interfacial bonding was revealed by the damping ratio analysis with the increase in glass fiber reinforcement in the hybrid composites. The hybrid composites exhibited increase in storage and loss modulus with increase in glass fiber content. Scanning electron microscopy was carried out to study the fracture surface morphology of the composite specimens.

摘要

研究了杂化对环氧树脂/玻璃纤维增强复合材料动态力学性能的影响. 采用手工铺层法，在5、10、15、20 wt%时，通过改变Calotropis procera和玻璃纤维组成的纤维增强率来制备复合材料. 在25°C ~ 180°C温度范围内，在1hz频率下，对复合材料进行了动态力学分析. 研究表明，与纯环氧树脂相比，纤维增强复合材料的玻璃化转变温度有微小的变化，说明纤维增强复合材料具有较高的耐温性能. 结果表明，随着玻璃纤维增强量的增加，复合材料的界面粘结性能提高. 随着玻璃纤维含量的增加，复合材料的贮存量和损耗模量增加. 采用扫描电镜(SEM)对复合材料的断口形貌进行了研究.

KEYWORDS:

• Natural fiber composites
• calotropis procera
• glass fiber
• dynamic mechanical analysis
• scanning electron microscopy

关键词:

• 天然纤维复合材料
• 玻璃纤维
• 动态力学分析
• 扫描电子显微镜