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preface to fifteenth edition

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TABLE 10.2<br />

Properties of Commercial Plastics (Continued)<br />

Vinyl<br />

Properties<br />

Poly(vinyl<br />

chloride) and<br />

poly(vinyl<br />

acetate)<br />

Flexible and<br />

filled<br />

Poly(vinyl<br />

chloride), 15%<br />

glass-fiberreinforced<br />

Poly(vinylidene<br />

chloride)<br />

Poly(vinyl<br />

formal)<br />

Chlorinated<br />

poly(vinyl<br />

chloride)<br />

Poly(vinyl<br />

butyral),<br />

flexible<br />

Physical<br />

Melting temperature, C<br />

Crystalline 210<br />

Amorphous 75–105 75–105 105 110 49<br />

Specific gravity 1.3–1.7 1.54 1.65–1.72 1.2–1.4 1.49–1.56 1.05<br />

Water absorption (24 h),% 0.5–1.0 0.01 0.1 0.5–3.0 0.02–0.15 1.0–2.0<br />

Dielectric strength, kV · mm 1 9.8–12 24–31 16–24 19 14<br />

Electrical<br />

Volume (dc) resistivity,<br />

ohm-cm 10 14 –10 16<br />

Dielectric constant (60 Hz) 4.5–6.0<br />

Dielectric constant (10 6 Hz)<br />

Dissipation (power) fac<strong>to</strong>r<br />

(60 Hz)<br />

Dissipation fac<strong>to</strong>r (10 6 Hz)<br />

Mechanical<br />

Compressive modulus,<br />

10 3 lb · in 2 335–600<br />

10.56

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