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preface to fifteenth edition

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TABLE 10.2<br />

Properties of Commercial Plastics (Continued)<br />

Alloy<br />

Properties<br />

Poly(methyl<br />

methacrylate)<br />

Cast<br />

sheet<br />

Acrylic<br />

Alkyd,<br />

molded<br />

Acrylic<br />

poly(vinyl<br />

chloride) alloy<br />

Impactmodified<br />

Heatresistant<br />

Acrylonitrilebutadienestyrenepoly(vinyl<br />

chloride) alloy<br />

Compressive strength, rupture or<br />

1% yield, 10 3 lb · in 2 12–18 11–19 4–14 17 16–20 8.4<br />

Elongation at break, % 2–10 2–7 20–70 3–5 100<br />

Flexural modulus at 23C,<br />

10 3 lb · in 2 420–460 390–475 200–380 460–500 330–400 340<br />

Flexural strength, rupture or yield,<br />

10 3 lb · in 2 13–19 12–17 7–13 12–16 10.7 9.6<br />

Hardness, Rockwell (or Shore) M85–M105 M80–M100 R105–R120 M95–M105 E76 R99–R105 R100<br />

Impact strength(Izod) at 23C,<br />

J·m 1 16–27 16–21 43–133 16–21 27–240 800 560<br />

Tensile modulus, 10 3 lb · in 2 380–450 350–450 200–400 350–460 330–335 330<br />

Tensile strengthat break,<br />

10 3 lb · in 2 7–11 8–11 5–9 10 4.5–6.5 6.5 5.8<br />

Tensile yield strength,<br />

10 3 lb · in 2 10–13<br />

Thermal<br />

Burning rate, mm · min 1 0.5–2.2 Selfextinguishing<br />

Coefficient of linear thermal<br />

expansion, 10 6 C 50–90 50–90 50–80 50–60 40–55 46<br />

Deflection temperature under<br />

flexural load (264 lb · in 2 ), C 74–99 71–102 74–95 88–104 177–204 71<br />

Maximum recommended service<br />

temperature, C 60–71 220<br />

Specific heat, cal · g 1 0.36 0.35<br />

Thermal conductivity,<br />

W·m 1 ,K 1 0.17–0.25 0.17–0.25 0.17–0.21 0.19<br />

10.25

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