Table 11a. Hardness (Barcol) readings of PVC exposed
Table 11b. Percent weight gain of PVC exposed to aque-
to aqueous solutions of methylene chloride (MC) and
ous solutions of methylene chloride (MC) and acetone.
acetone.
MC, Acetone
Contact time, days
MC,
Acetone
Contact time, days
activity (%)
2
4
7
14
21
Rel. sol.
(%)
2
4
7
14
21
control
0.00
0.16
0.18
0.24
0.16
control
75
75
74
73
74
control
0.00
0.17
0.08
0.33
0.17
control
76
74
76
73
75
control
0.08
0.16
0.17
0.24
0.23
control
76
76
73
74
76
control
0.08
0.25
0.16
0.25
0.16
control
74
74
75
76
75
control
0.00
0.25
0.24
0.32
0.28
control
75
75
76
75
75
0.03a
0.20a
0.17a
0.28a
0.20a
75.2
74.8
74.8
74.2
75
X
X
S.D.
0.04
0.05
0.06
0.04
0.05
0.4,
0.0
73
72
74
73
74
0.4,
0.0
0.24
0.32
0.56
0.58
0.71
0.4,
0.0
74
74
74
76
72
0.4,
0.0
0.17
0.46
0.55
0.56
0.77
0.4,
0.0
76
73
76
73
75
0.4,
0.0
0.26
0.40
0.56
0.61
0.87
0.4,
0.0
75
75
73
74
72
0.4,
0.0
0.23
0.55
0.33
0.54
0.76
0.4,
0.0
74
76
73
72
73
0.4,
0.0
0.16
0.49
0.56
0.48
0.92
74.4
74
74
73.6
73.2
X
0.21b
0.44a,b
0.51a,b
0.55a
0.81b
X
0.4,
0.5
75
74
71
70
72
S.D.
0.04
0.09
0.10
0.05
0.09
0.4,
0.5
76
70
68
71
72
0.4,
0.5
0.16
0.57
0.62
0.84
0.70
0.4,
0.5
74
67
67
67
70
0.4,
0.5
0.42
0.48
0.76
1.03
0.65
0.4,
0.5
75
69
70
75
71
0.4,
0.5
0.16
0.48
0.67
0.80
0.73
0.4,
0.5
75
68
68
70
70
0.4,
0.5
0.16
0.58
0.65
0.89
0.82
75
69.6*
68.8*
70.6
71.0*
X
0.4,
0.5
0.26
0.33
0.63
0.95
1.01
0.4,
1.0
74
68
66
68
74
0.23b
0.49b
0.67b
0.90b
0.78b
X
0.4,
1.0
74
69
72
72
71
S.D.
0.11
0.10
0.05
0.09
0.14
0.4,
1.0
75
71
71
67
71
0.4,
1.0
0.25
0.67
0.87
1.20
0.97
0.4,
1.0
76
67
69
74
73
0.4,
1.0
0.29
0.83
0.73
1.12
1.01
0.4,
1.0
75
72
70
73
69
0.4,
1.0
0.16
0.70
0.51
1.12
1.00
74.8
69.4*
69.6*
70.8
71.6*
X
0.4,
1.0
0.47
0.49
0.68
1.07
1.17
0.4,
5.0
74
71
70
69
72
0.4,
1.0
0.32
0.64
0.58
0.92
1.20
0.4,
5.0
75
68
70
68
69
0.30b,c
0.67b
0.67b
1.09b
1.07b,c
X
0.4,
5.0
74
73
67
71
73
S.D.
0.11
0.12
0.14
0.11
0.11
0.4,
5.0
74
68
69
73
72
0.4,
5.0
0.42
0.75
0.76
0.91
1.07
0.4,
5.0
75
70
70
71
72
0.4,
5.0
0.53
0.70
0.80
0.93
1.27
74.4
70.0*
69.2*
70.4*
71.6*
X
0.4,
5.0
0.44
0.59
0.80
1.09
1.13
0.4,
10.0
75
72
71
63
69
0.4,
5.0
0.33
0.64
0.73
1.22
1.20
0.4,
10.0
74
68
69
65
72
0.4,
5.0
0.44
0.73
0.88
1.20
1.08
0.4,
10.0
74
70
70
69
68
0.43c
0.68b
0.79b
1.07b
1.15c
X
0.4,
10.0
73
66
68
68
67
S.D.
0.07
0.07
0.06
0.15
0.08
0.4,
10.0
73
67
70
69
68
0.4,
10.0
0.41
1.15
1.81
2.07
2.04
73.8
68.6*
69.6*
66.8*
68.8*
X
0.4,
10.0
0.50
1.51
1.85
1.65
1.85
0.4,
20.0
67
63
60
54
53
0.4,
10.0
0.50
1.12
1.58
1.79
1.87
0.4,
20.0
71
62
54
51
54
0.4,
10.0
0.83
0.80
1.51
1.78
1.97
0.4,
20.0
68
65
53
52
48
0.4,
10.0
0.82
1.12
1.34
1.65
2.30
0.4,
20.0
72
58
59
58
46
0.61d
1.14c
1.62c
1.79c
2.01d
X
0.4,
20.0
69
60
67
62
45
S.D.
0.20
0.25
0.21
0.17
0.18
69.4*
61.6*
58.6*
55.4*
49.2*
X
0.4,
20.0
2.33
4.53
6.46
6.64
6.34
*Significantly different from controls.
0.4,
20.0
2.05
5.05
5.51
5.66
6.57
0.4,
20.0
2.00
4.70
5.58
5.91
7.35
0.4,
20.0
2.03
4.38
4.96
6.18
7.71
0.4,
20.0
2.49
4.00
4.70
4.94
7.37
2.18e
4.53d
5.44d
5.87d
7.07e
X
S.D.
0.22
0.39
0.68
0.63
0.58
S.D. = standard deviation
Values with different letters, taken at the same time, are significantly
different.
18
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