1.Explain what is meant by ‘conditioning’ inpolymers. Compare the behaviour of the polyethylene sheet andfibre (Spectra) in terms of conditioning. Explain the observed behaviour of the polyethylene sheet whenreheated.
2.Sandwhich structures are obviously very efficient in bending applications. Would they be equally efficient in tensile or compressive loading? Explain your answer in terms of area available for carrying tensile-compressive loads.