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preface to fifteenth edition

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TABLE 10.2<br />

Properties of Commercial Plastics (Continued)<br />

Epoxy<br />

Fluorocarbon<br />

Properties<br />

Unfilled<br />

Casting resin<br />

Flexible<br />

Novolac resin<br />

Mineral-filled<br />

Poly(tetrafluoroethylene)<br />

Granular<br />

Glass-fiberreinforced<br />

Poly(chlorotrifluoroethylene)<br />

Perfluoroalkoxy<br />

Compressive strength, rupture<br />

or 1% yield, 10 3 lb · in 2 15–25 1–14 30 1.7 4.6–7.4<br />

Elongation at break, % 3–6 20–70 2–4 200–400 200–300 80–250 300<br />

Flexural modulus at 23C,<br />

10 3 lb · in 2 2000 80 235 120<br />

Flexural strength, rupture or<br />

yield, 10 3 lb · in 2 13–21 1–13 16–20 2 7.4–9.3<br />

Hardness, Rockwell (or Shore) M80–M110 (D50–D55) (D60–D70) R75–R95 (D64)<br />

Impact strength(Izod) at<br />

23C, J · m 1 10.7–53 187–267 21 160 144 133–160 No break<br />

Tensile modulus, 10 3 lb · in 2 350 1–350 58–80 150–300<br />

Tensile strengthat break,<br />

10 3 lb · in 2 4–13 2–10 6–12 2–5 2–2.7 4.5–6 4–4.3<br />

Tensile yield strength,<br />

10 3 lb · in 2 30<br />

Thermal<br />

Burning rate, mm · min 1<br />

Selfextinguishing<br />

Selfextinguishing<br />

Selfextinguishing<br />

Coefficient of linear thermal<br />

expansion, 10 6 C 45–65 20–100 22–30 100 77–100 70<br />

Deflection temperature under<br />

flexural load (264 lb · in 2 ),<br />

C 46–288 23–121 149–260 121 (66 lb · in 2 ) 126 (66 lb · in 2 )<br />

Maximum recommended<br />

service temperature, C 260 200<br />

Specific heat, cal · g 1 0.25 0.22<br />

Thermal conductivity,<br />

W·m 1 ·K 1 0.17–0.21 0.25 0.34–0.40 0.19–0.22 0.25<br />

74 (66 lb ·<br />

in 2 )<br />

10.31

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