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preface to fifteenth edition

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TABLE 10.6<br />

Vapor Permeability Constants (10 10 P)at35C for Polymers<br />

All tabulated values are multiplied by 10 10 and are in units of seconds 1 (centimeters of Hg) 1 .<br />

Vapor<br />

Polymer<br />

Benzene<br />

Hexane<br />

Carbon<br />

tetrachloride Ethanol Ethyl acetate<br />

Cellulose 1.4 0.912 0.836 85.8 13.4<br />

Cellulose acetate 512 2.80 3.74 2 980 3 595<br />

Poly(acrylonitrile) 2.61 1.59 1.47 0 1.34<br />

Polyethylene, low-density 5 300 2 910 3 810 55.9 513<br />

Polystyrene 10 600 6 820 0 soluble<br />

Poly(vinyl alcohol) 3.58 2.34 1.61 32.7 2.53<br />

10.7 FATS, OILS, AND WAXES<br />

TABLE 10.7<br />

Constants ofFats and Oils<br />

Fat or oil<br />

Solidification<br />

point, C<br />

Specific<br />

gravity<br />

(15C/15C)<br />

Refractive<br />

index<br />

Acid<br />

value<br />

Saponification<br />

value<br />

Iodine<br />

value<br />

Animal origin<br />

Butterfat 20–23<br />

40C<br />

0.91 15C 1.45 40C 0.5–35 210–230 26–38<br />

Chicken fat 21–27 0.924 1.2 193–205 66–72<br />

Cod-liver oil 3 0.92–0.93 1.481 25C 5.6 171–189 137–166<br />

Deer fat 0.96–0.97 0.8–5.3 195–200 26–36<br />

10.69

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