between 0.27*1010 Pa and 0.35*1010 Pa depending on the perspex
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Perspex is a clear acrylic; its modulus depends on the process, but generally ranges between 300,000 psi and 400,000 psi (2.0-2.5 GPa)
E=2800 MPa nu=0.38 For Perspex sheet
The Young modulus and storage modulus measure two different things and use different formulas. A storage modulus measures the stored energy in a vibrating elastic material. The Young modulus measures the stress to in still elastic, and it is an elastic modulus.
The plastic in perspex (the common US name is plexiglas) is poly(methyl methacrylate).
Plastics.
The young modulus young modulus(E) = stress/strain stress = force/area strain = extension(total length)/original length It is this property that determines how much a bar will sag under its own weight or under a loading when used as a beam within its limit of proportionality