Use the \(E-H_{p} ho\) chart of Fig. 14.7 to find the polymer with a modulus \(E\) greater than \(1 \mathrm{GPa}\) and the lowest embodied energy per unit volume.

Data From Fig, 14.7

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103 Young's modulus, E (GPa) Stainless steels SIC B&C AIN WC Metals Carbon- steels Al2O3 Ni alloys Silicon, W alloys Cu alloys Modulus energy/m Technical ceramics Silica glass Borosilicate glass 102 Nontechnical ceramics 10 T 0.1 0.01 102 Soda glass Bamboo Cast irons Zinc alloys' Composites Ti alloys CFRP Al alloys 1/3 Mg alloys HpP GFRP Lead alloys Brick Epoxies Concrete Phenolics- PEEK Stone Wood // to grain PET Polymers 1/2 1/2 PVC Hpp Acetal Wood to grain PS- Nylons PP. Natural PC PE materials Rigid polymer foams Polyurethanes ABS E HpP PTFE Ionomers Leather Cork Foams Flexible polymer foams 103 104 105 EVA Polyurethane Guidelines for minimum energy design Elastomers Silicone elastomers 106 Embodied energy per cubic meter, Hp.p (MJ/m) 107 MFA 16