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Degussa AG Rohacell® 71 XT Extended Temperature Grade Polymethacrylimide (PMI) Foam

 

Subcategory: Thermoset; Composite Core Material; Polymer

Material Notes:
Description: ROHACELL® is produced by thermal expansion of a co-polymer sheet of methacrylic acid and methacrylonitrile. During the foaming process the copolymer sheet is converted to PMI - PolyMethacrylImide. Alcohol is used as a blowing agent, thus ROHACELL® contains no fluorinated carbon hydrates and is halogen free. It has a very homogeneous cell structure and isotropic properties.

Specific Notes for this Material: ROHACELL® XT (= Extended Temperature) is a closed-cell rigid foam plastic based on PMI (polymethacrylimide) which does not contain any CFCs. ROHACELL® XT serves as a core material in advanced BMI-sandwich parts used in aircraft and space construction. Curing temperature up to 190C (374F). Curing pressure up to 0.7 Mpa (100 psi) and post-curing temperature (free-standing) up to 230C (446 F). Sandwich components using ROHACELL® XT as a core material can be realized in a single work step (=cocuring). The structural components can be manufactured in an autoclave and by means of RTM. ROHACELL® XT is easy to shape. Thermoformability is another advantage of the core material.

Information provided by degussa.

Available Properties
  • Density
  • Tensile Strength at Break
  • Elongation at Break
  • Modulus of Elasticity
  • Compressive Strength
  • Poissons Ratio
  • Shear Modulus
  • Shear Strength
  • Maximum Service Temperature, Air
   
Property Data

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