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LANGE'S HANDBOOK OF CHEMISTRY

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TABLE 10.5 Gas Permeability Constants (10 10 P)at25C for Polymers and Rubbers (Continued)<br />

Acrylonitrile-styrene copolymer<br />

(66 : 34) 0.048 0.21 2 000<br />

Poly(1,3-butadiene) 6.42 41.9 19.0 138.0 5 070<br />

Poly (cis-1,4-butadiene) 32.6 19.2 19.2 (Ne); 41.0 (Ar)<br />

Butadiene-acrylonitrile copolymer<br />

(80 : 20) 12.2 1.06 15.9 3.85 30.8 24.8 (C 2H 2); 7.7 (propyne)<br />

Butadiene-styrene copolymer (80 : 20) 13.4 1.71 5.01 (Ne); 4.49 (Ar)<br />

Butadiene-styrene copolymer (92 : 8) 22.9 5.11 9.70 (Ne); 12.7 (Ar)<br />

Polychloroprene 1.2 13.6 4.0 25.8 3.79 (Ar); 3.27 (CH 4)<br />

Polyethylene, low-density 4.9 0.969 12.0 30 2.88 12.6 90 2.88 (CH 4); 6.81 (C 2H 6);<br />

9.43 (C 3H 8); 1.48 CO);<br />

49 0 (ethylene oxide);<br />

14.4 (propene); 42.2 (propyne);<br />

0.170 (SF 6); 472 60 (CH 3Br)<br />

Polyethylene, high-density 1.14 0.143 3.0 20 0.403 0.36 12.0 0.388 (CH 4); 0.590 (C 2H 6);<br />

0.537 (C 3H 8); 0.008 3 (SF 6);<br />

1.69 (Ar); 4.01 (propene)<br />

Poly(ethylene terephthalate)<br />

Crystalline 1.32 0.006 5 3.70 20 0.035 0.17 130 0.003 2 (CH 4); 0.08 60 (CH 3Br)<br />

Amorphous 3.28 0.013 0.059 0.30 0.009 (CH 4)<br />

Poly(ethyl methacrylate) 6.82 0.220 1.15 5.00 3 200 2.98 (Ne); 0.565 (Ar); 0.370 (Kr);<br />

3.83 (H 2S); 0.000 001 65 (SF 6)<br />

Isobutene-isoprene copolymer<br />

(98 : 2) 8.38 0.324 7.20 1.30 5.16 110 38 13.6 50 (C 3H 8)<br />

Isoprene-acrylonitrile copolymer<br />

(76 : 24) 7.77 0.181 7.41 0.852 4.32<br />

10.67<br />

Polymer or rubber<br />

He N 2 H 2 O 2 CO 2 H 2O Other<br />

Gas

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