Abstract
Vinyl ester (VE) resin films were developed from epoxy resins via esterification with methacrylic acid without a reactive diluent to fabricate carbon fiber (CF) prepregs via a hot-melt impregnation process. The viscosity of VE resins suitable for the hot-melt prepreg method was optimized by mixing two different bisphenol-A epoxy precursors, with low and high molar masses. Unidirectional CF prepregs were fabricated via the hot-melt impregnation method using as-prepared VE films. Manual layup of as-prepared VE prepregs with subsequent curing in an autoclave led to the successful fabrication of CF-reinforced composites with good tensile and flexural strength. The kinetics and mechanism of the radical crosslinking of VE synthesized using various mixing ratios of two different epoxy precursors were studied using nonisothermal differential scanning calorimetry. Quantitative analyses with the autocatalytic model and model-free methods indicated that the higher viscosity of VE causes a higher energy barrier associated with molecular mobility and diffusion.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
