E2

Veriflex E2 is a fully formable, thermoset, shape memory polymer (SMP) resin system. Cornerstone Research Group Inc. (CRG) developed this two-part resin system consisting of the base resin, Veriflex E2a, and the curing agent, Veriflex E2b. The resin and the curing agent are sold separately.

Cured Veriflex E2 combines shape memory properties with the high toughness and strength of epoxy. When heated above its activation

temperature, cured Veriflex E2 changes from a rigid plastic to an elastic state. It can then be twisted, pulled, bent, and stretched. When cooled, the polymer hardens and can hold its deformed shape. If heated again, it returns to the shape in which it was cured. This process can be repeated without loss of the memory shape or degradation of the material.

Epoxy is a well understood and commonly used resin system. It provides convenient processing, usage, and property modification. Veriflex E2 is a high-performance material formulated from commercially available resins and curing agents. It can be cast and cured into a variety of “memorized” shapes, depending on the application requirements.

Epoxy SMP has a very sharp modulus transition curve, yielding a quick recovery to the “memory” shape upon heating past the transition temperature.

Benefits

• Toughness
• Recovery of memorized shape even after repeated deformation
• Ability to change from a rigid polymer to rubbery elastomer
• Over 100% elongation in elastic state
• Low viscosity for easy processing (RTM or VARTM)
• Transition temperature of approximately 104 °C (219 °F)
• Aesthetic clarity
• Machinability once cured