From the stress–strain data for poly(methyl methacrylate) shown in Figure 15.3, determine...

Material

Specific Gravity

Tensile Modulus [GPa (ksi)]

Tensile Strength [MPa (ksi)]

Yield Strength [MPa (ksi)]

Elongation at Break (%)

Polyethylene (low density)

0.917–0.932

0.17–0.28 (25–41)

8.3–31.4 (1.2–4.55)

9.0–14.5 (1.3–2.1)

100–650

Polyethylene (high density)

0.952–0.965

1.06–1.09 (155–158)

22.1–31.0 (3.2–4.5)

26.2–33.1 (3.8–4.8)

10–1200

Poly(vinyl chloride)

1.30–1.58

2.4–4.1 (350–600)

40.7–51.7 (5.9–7.5)

40.7–44.8 (5.9–6.5)

40–80

Polytetrafluoroethylene

2.14–2.20

0.40–0.55 (58–80)

20.7–34.5 (3.0–5.0)

13.8–15.2 (2.0–2.2)

200–400

Polypropylene

0.90–0.91

1.14–1.55 (165–225)

31–41.4 (4.5–6.0)

31.0–37.2 (4.5–5.4)

100–600

Polystyrene

1.04–1.05

2.28–3.28 (330–475)

35.9–51.7 (5.2–7.5)

25.0–69.0 (3.63–10.0)

1.2–2.5

Poly(methyl methacrylate)

1.17–1.20

2.24–3.24 (325–470)

48.3–72.4 (7.0–10.5)

53.8–73.1 (7.8–10.6)

2.0–5.5

Phenol-formaldehyde

1.24–1.32

2.76–4.83 (400–700)

34.5–62.1 (5.0–9.0)

—

1.5–2.0

Nylon 6,6

1.13–1.15 1.58–3.80 (230–550)

75.9–94.5 (11.0–13.7)

44.8–82.8 (6.5–12)

15–300

Polyester (PET)

1.29–1.40

2.8–4.1 (400–600)

48.3–72.4 (7.0–10.5)

59.3 (8.6)

30–300

Polycarbonate

1.20

2.38 (345)

62.8–72.4 (9.1–10.5)

62.1 (9.0)

110–150