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preface to fifteenth edition

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TABLE 10.2<br />

Properties of Commercial Plastics (Continued)<br />

Fluorocarbon<br />

Melamine formaldehyde<br />

Properties<br />

Fluorinated<br />

ethylenepropylene<br />

resin<br />

Poly(vinylidene<br />

fluoride)<br />

Ethylene-tetrafluoroethylene<br />

copolymer<br />

Unfilled<br />

Glass-fiberreinforced<br />

Ethylenechlorotrifluoroethylene<br />

copolymer<br />

Cellulosefilled<br />

Glass-fiberreinforced<br />

Compressive strength, rupture<br />

or 1% yield, 10 3 lb · in 2 2.2 8.7–10 7.1 10 33–45 20–35<br />

Elongation at break, % 250–330 25–500 100–400 8 200–300 0.6–1.0 0.6<br />

Flexural modulus at 23C,<br />

10 3 lb · in 2 80–95 200 200 950 240 1100<br />

Flexural strength, rupture or<br />

yield, 10 3 lb · in 2 8.6–11 5.5 10.7 7 9–16 14–23<br />

Hardness, Rockwell (or Shore) (D60–D65) (D80) R50 (D75) R74 R95 M115–M125 M115<br />

Impact strength(Izod) at<br />

23C, J · m 1 No break 192–214 No break 480 No break 11–21 32–961<br />

Tensile modulus, 10 3 lb · in 2 50 120 120 1200 240 1.1–1.4 1.6–2.4<br />

Tensile strengthat break,<br />

10 3 lb · in 2 2.7–3.1 5.5–7.4 6.5 12 7 5–13 5–10.5<br />

Tensile yield strength,<br />

10 3 lb · in 2<br />

Thermal<br />

Burning rate, mm · min 1<br />

Not<br />

combustible<br />

Not<br />

combustible<br />

Not<br />

combustible<br />

Not<br />

combustible<br />

Not<br />

combustible<br />

Selfextinguishing<br />

Selfextinguishing<br />

Coefficient of linear thermal<br />

expansion, 10 6 C 83–105 85 59 10–32 80 40–45 15–28<br />

Deflection temperature under<br />

flexural load (264 lb · in 2 ),<br />

C 70 (66 lb · in 2 ) 80–90 71 210 77 177–199 190–204<br />

Maximum recommended<br />

service temperature, C 205 150 210<br />

Specific heat, cal · g 1 0.28<br />

Thermal conductivity,<br />

W·m 1 ·K 1 0.25 0.19–0.24 0.24 0.16 0.27–0.41 0.41–0.49<br />

10.33

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