Prepregs high performance epoxy

Diaminodiphenyl sulfone (DDS) cured tetraglycidyl-4,4 -diaminodiphenylmethane (TGDDM) epoxies are the mpst common composite matrices utilized in high performance fibrous composites prepared from prepregs. The structures of the unreacted TGDDM epoxide and DDS monomers are illustrated in Fig. 3. The TGDDM epoxide monomer is a liquid at 23 °C, whereas the DDS monomer is a crystalline... 

The isothermal cure kinetics of a glass fiber-epoxy resin prepreg is investigated using high performance liquid chromatography (HPLC) and differential scanning calorimetry (DSC). The... 

This process offers a method of producing more predictable laminated structures, for high performance applications. Prepreg tapes are mainly made of the higher performance materials, such as epoxy/carbon or PEEK/carbon. This system can also be used in filament winding. 

Most of the high performing composite components are currently produced by using epoxy based prepreg laminates cured in an autoclave at high... 

For use in the manufacture of high production/performance epoxy prepreg and allied needs, but allowing a reduction in the cure cycie from typically 60 to 90 minutes to 15 to 20 minutes at between 113 - 121 C. Has gel time and fiow characteristics simiiar to standard epoxies. 

To facilitate the many choices of laminates and their associated properties, industry standards groups such as the IPC have defined minimum performance specifications and have issued several specifications to inform the selection process. Some of the most commonly used material specifications are those that deal with laminate,prepreg, and copper foil. IPC lOl, Specification for Base Materials for Rigid and Multilayer Printed Boards, and IPC-4652, Metal Foil for Printed Wiring Applications, are the primary specifications for clad laminates, prepregs, and foils. Another specification, IPC- 4104, Specification for High Density Interconnect (HDI) and Microvia Materials, deals with many of the new materials for HDI, such as epoxy-coated microfoils, as discussed in this chapter. 

The resin used was a Hercules epoxy with a high temperature performance reinforcement was carbon fibre. Thirty-two plies of prepreg were used to make the specimens so that the fibre volume loading was approximately constant. 

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