Summary of the property changes

An excellent table summarizing typical data concerning the mechanical properties of polymers has been published by Parkinson [426]. It is reproduced here (Table 33) as a guide for polymer use in nuclear science technology. 

Material Initial valueb Dose ratec (Mrad h 1) Thickness (in.) 

Polyethylene high-density (linear) tensile strength (p.s.i.) elongation at break (%) 3,000 170 2 0.12 

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