Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Question
Calculate the permeability coefficient P of LDPE and PP at 45 Celcius, given that Ep= 40 kJ mol^−1 and R = 8.314 J K^−1 mol^−1
Transcribed Image Text:TABLE 4.3
Broadly Representative Permeability Coefficients of Various Polymers
and Permeants at 25°C and 0% RH Unless Indicated Otherwise
P (Barrer)
Polymer
co,
N2
so, H,O (90% RH)
1.5
Linear low density polyethylene
Low density polyethylene
High density polycthylene
Poly(ethylene-co-vinyl acetate)
Polypropylene
Poly(vinyl chloride) film
Polystyrene film (oriented)
Polyacrylonitrile
Nylon-6 (0% RH)
Nylon-MXD6
Poly(ethylene terephthalate)
1.3-3.0
13
3.0-6.7
13-28
0.6-1.9
20
80
0.6-1.1
1.7-4.5
0.14-0.33
5.7
13
3.0-4.2
13.1-17.3
29
0.9-2.3
9.2
0.44
0.7
57
0.005-0.12
0.03-1.0
0.04
0.12
156-275
1.1-2.7
8.8-10.5
0.29-0.78
22
11-1,800
0.00024
0.006
2.2
0.012-0.038 0.04-0.16
0.01
2.2
700
0.001-0.003 0.0093
(amorphous)
0.055-0.075 0.21–0.30
0.005
130-183
(40% crystalline)
Poly(ethylene naphthalate)
Polycarbonate film
PVdC copolymer
EVOH copolymer
32% ethylene
44% ethylene
0.018-0.030 0.12-0.16
0.006
0.0075
0.022
1.5
6.4
0.0006
0.0022-0.0036 0.0009
1.4 4.5
0.00012
0.00036
0.000012
0.00048
0.0014
0.00005
PCTF
0.03-0.50
0.05-1.25
0.01-0.13
0.3-36
Cellulose acetate
0.4-0.8
2.4-18
0.2-0.5
1,500-10,600
Regenerated cellulose (cellophane)
Poly(lactic acid)(98% L)
0.0021
0.0047
0.0032
1,900
0.11-0.56
1.88
4.99
3,000
a 12%.
Nylon-11.
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