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Carbon Fiber Applications for Hot Melt Vinyl Hybrid Snap Cure Prepreg Resins

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Carbon Fiber Applications for Hot Melt Vinyl Hybrid Snap Cure Prepreg Resins

 

In several markets, the objective of light weighting is one of the key characteristics by which material engineers justify the use of composite components.  In the auto industry, this is exemplified by the CAFE requirement of 54.5 mpg average for a given OEM fleet by 2025.  Part of this challenge involves removing weight without affecting the performance of the vehicle or the productivity rate of the process to manufacture the component.  Carbon fiber composites have the ability to meet the performance criteria and offer an excellent strength to weight ratios in structural automotive applications.  Rapid cure is known to exist for many composite processes including epoxy and styrenated vinylesters.  Epoxy resins have been successful at obtaining a snap cure response, under 2 minutes cure cycles, but have limitations on the storage conditions of the prepregs manufactures and their shelf life.  The problem associated with vinyl resins in these same applications has been the use of styrene or like monomers to dissolve the resin alkyd and the environmental concerns for fabricators not accustomed to handling such chemistries. In addition, there is concern over residual monomer in parts requiring secondary bake cycles.  Vinyl hybrid resins are a new class of materials which have been developed with the elimination of reactive diluents. These new vinyl hybrid resins have been studied which maintain the fast, snap cure performance of traditional polyester or vinylester resins as well as the mechanical properties comparable to both styrenated resins and commercially available epoxy systems.  This paper investigates the adhesion of vinyl hybrid resins to commercially available carbon fiber inputs.  It will demonstrate mechanical properties of liquid vinyl hybrid resins used in pultrusion, filament winding and resin transfer molding as well as hot melt vinyl hybrid resins used in long continuous fiber prepreg materials

 

Authors: James A. Bono

 

Conference: CAMX 2016 – Anaheim

 

SKU/Code: TP16-0125

 

Pages: 10

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