【摘 要】
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Resin infusion has been developed as a low-cost process for manufacturing fiber-reinforced epoxy composites with high fiber loading.However, it is an extremely slow process due to the long time requir
【机 构】
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School of Materials Sci.& Eng.,Georgia Institute of Technology,Atlanta,Georgia,30332,USA
【出 处】
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第十一届先进成型与材料加工技术国际研讨会
论文部分内容阅读
Resin infusion has been developed as a low-cost process for manufacturing fiber-reinforced epoxy composites with high fiber loading.However, it is an extremely slow process due to the long time required to prepare a vacuum-tight mold and further to cure the resin at room temperature.In this work, technical approaches were developed to improve the efficiency of resin infusion, making it suitable for high-volume production.Particularly, strategies for quick mold setup and rapid curing were proposed and implemented in experimental studies.Experimental results showed that these modifications allowed epoxy matrix composite plaques (continuous fibers reinforced) to be manufactured within short cycle times of minutes while maintaining the conventional mechanical properties.Thermal analysis and rheological measurements were performed to understand the curing behavior of epoxy at elevated temperatures and define an optimal process window for rapid infusion.The new process was also adapted to processing of highly filled polymers.Silica filled epoxy parts with extremely high solid filler loading exceeding 70 wt%, as well as with complex external geometry, were successfully produced.The resulting material is structurally uniform and its mechanical properties can be adjusted by changing the composition and makeup of the filler materials.Broad impacts of this new process in rapid processing of fiber-reinforced composites and filled polymers are anticipated in volume industries including the automotive industry.
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