Molecules, Vol. 25, Pages 3117: Ameliorated Mechanical and Dielectric Properties of Heat-Resistant Radome Cyanate Composites

Molecules, Vol. 25, Pages 3117: Ameliorated Mechanical and Dielectric Properties of Heat-Resistant Radome Cyanate Composites Molecules doi: 10.3390/molecules25143117 Authors: Hou-Yu Li Chang-Ming Li Jun-Guo Gao Wei-Feng Sun In order to improve the mechanical and dielectric properties of radome cyanate, a synergistic reinforcement method is employed to develop a resin-based ternary-composite with high heat-resistance and preferable radar-band transmission, which is expected to be applied to fabricate radomes capable of resisting high temperature and strong electric field. According to copolymerization characteristics and self-curing mechanism, epoxy resin (EP) and bismaleimide (BMI) are employed as reinforcements mixed into a cyanate ester (CE) matrix to prepare CE/BMI/EP composites of a heat-resistant radome material by high-temperature viscous-flow blending methods under the catalysis of aluminum acetylpyruvate. The crystallization temperature, transition heat, and reaction rate of cured polymers were tested to analyze heat-resistance characteristics and evaluate material synthesis processes. Scanning electron microscopy was used to characterize the micro-morphology of tensile fracture, which was combined with the tensile strength test and dynamic thermomechanical analysis to investigate the composite modifications on tenacity and rigidity. Weibull statistics were performed to analyze the experimental results of the dielectric breakdown field, and the dielectri...
Source: Molecules - Category: Chemistry Authors: Tags: Article Source Type: research