28.12.2013 Views

preface to fifteenth edition

preface to fifteenth edition

preface to fifteenth edition

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

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 />

Physical<br />

Melting temperature, C<br />

Crystalline 90–105 90–105 80–100 100–125 105<br />

Amorphous<br />

Specific gravity 1.17–1.20 1.18–1.20 1.11–1.18 1.16–1.19 2.22–2.24<br />

Water absorption (24 h), % 0.1–0.4 0.2–0.4 0.2–0.8 0.2–0.3 0.06<br />

Dielectric strength, KV · mm 1 15.7–19.9 17.7–21.7 15.0–19.9 15.7–19.9 15.7 19.7<br />

Electrical<br />

Volume (dc) resistivity, ohm-cm 10 14 10 14<br />

Dielectric constant (60 Hz) 3.3–4.5 3.5–4.5 3.8–5.0<br />

Dielectric constant (10 6 Hz) 3.0–3.5 3.6–4.7<br />

Dissipation (power) fac<strong>to</strong>r (60 Hz) 0.04–0.06 0.012–0.026<br />

Dissipation fac<strong>to</strong>r (10 6 Hz) 0.02–0.03 0.01–0.016<br />

Mechanical<br />

Compressive modulus,<br />

10 4 lb · in 2 370–460 390–475 240–370 350–460 330–400<br />

10.24

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!