From the stress???strain data for poly (methyl methacrylate) shown in Figure, determine the modulus of elasticity and tensile strength at room temperature [20°C (68°F)], and compare these values with those given in Table15.1.

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12 80 4°C (40°F) 70 10 60 20°C (68°F) 30°C (86°F) 50 40 40°C (104°F) 30 50°C (122°F) 20 To 1.30 60°C (140°F) 10 0.1 0.2 0.3 Strain Yield Strength [MPa (ksi)| Tensile Modulus Tensile Strength [MPa (ksi)] Elongation at Break (%) Specific Gravity Material IGP (ksi)] Polyethylene (low density) 0.917-0.932 0.17-0.28 8.3-31.4 9.0-14.5 100-650 (1.2-4.55) (25-41) (1.3-2.1) Pol ethylene (high density) 22.1-31.0 (3.2-4.5) 0.952-0.965 1.06-1.09 26.2-33.1 10-1200 (155–158) (3.8-4.8) Pol (vinyl chloride) 1.30-1.58 2.4-4.1 40.7-51.7 40.7-44.8 40-80 (5.9-6.5) (350-600) (5.9-7.5) Pol tetrafluoroethylene 2.14-2.20 0.40-0.55 20.7-34.5 200-400 (58-80) (3.0-5.0) Pol propylene 31.0-37.2 (4.5-5.4). 0.90-0.91 1.14-1.55 31-41.4 100-600 (165-225) (4.5-6.0) 1.04-1.05 Polystyrene 2.28-3.28 35.9-51.7 12-2.5 (330-475) (5.2-7.5) Pol (methyl methacrylate) 1.17-1.20 2.24-3.24 48.3-72.4 53.8-73.1 2.0-5.5 (7.0-10.5) (325-470) (7.8-10.6) 1.24-1.32 Phenol-formaldehyde 2.76-4.83 34.5-62.1 1.5-2.0 (400-700) (5.0-9.0) Nylon 6,6 1.13-1.15 1.58-3.80 75.9-94.5 (11.0-13.7) 44.8-82.8 15-300 (230-550) (6.5-12) Polyester (PET) 1.29-1.40 2.8-4.1 48.3-72.4 59.3 30-300 (400-600) (7.0-10.5) (8.6) 2.38 Polycarbonate 1.20 62.8-72.4 62.1 110-150 (345) (9.1-10.5) (9.0) Stress (MPa) 2. Stress (10 psi)