APPENDIX B: RESULTS OF THE LONG-TERM MISCIBLE SOLVENT STUDY
Table B1. Relative hardness (Barcol) values of PVC exposed to miscible solvent solutions for the long-term
study.
Solution
Solution
(%)
2
4
8
12
16
20 weeks
(%)
2
4
8
12
16
20 weeks
Controls for dimethylformamide, pyridine
and tetrahydrofuran
Controls for acetone
0.0
81
81
78
79
78
81
0.0
77
80
81
80
80
78
0.0
81
78
79
81
79
79
0.0
77
79
77
81
79
81
0.0
78
79
82
78
78
79
0.0
78
80
81
78
81
80
0.0
79
79
79
80
80
77
0.0
77
81
79
79
77
80
0.0
76
78
81
78
79
80
X
79.8
79.5
79.3
79.5
79.5
79.3
X
77.0
79.4
80.0
79.2
78.6
79.6
Dimethylformamide
Acetone
20
80
78
78
78
74
77
20
78
77
79
76
78
75
2.5
76
77
77
80
73
79
20
80
80
80
76
77
77
2.5
77
79
82
79
75
77
20
79
78
80
76
76
78
2.5
77
80
81
81
76
79
2.5
78
78
81
77
76
75
X
79.3
78.3
79.3
76.5
76.3
76.8
2.5
75
80
78
78
75
78
X
40
79
78
79
75
77
77
76.6
78.8
79.8
79.0
75.0
77.6
40
81
81
79
77
76
76
40
78
76
77
76
74
78
5
76
78
78
80
79
77
5
78
77
81
79
76
75
40
78
79
78
78
76
76
5
77
79
77
77
79
77
X
79
78.5
78.3
76.5
75.8
76.8
5
77
79
81
80
76
76
5
75
79
79
79
75
77
60
79
74
79
74
74
71
X
60
78
77
78
75
71
72
76.6
78.4
79.2
79.0
77.0
76.4
60
79
74
79
77
75
70
60
77
78
77
78
74
72
10
75
79
80
78
73
74
10
77
78
79
79
75
76
X
78.3
75.8
78.3
76.0
73.5
71.3
10
77
77
80
81
73
75
10
75
79
79
80
72
72
80
30
37
8
17
16
16
10
78
78
79
78
69
72
80
36
20
17
18
4
22
X
80
28
26
5
14
13
10
76.4
78.2
79.4
79.2
72.4
73.8
80
38
34
10
10
17
18
20
76
76
78
76
72
66
X
33.0
29.3
10.0
14.8
12.5
16.5
20
77
75
77
73
73
72
20
77
77
76
75
72
71
Pyridine
20
76
78
79
76
73
73
20
75
76
78
77
74
69
20
76
79
79
77
78
74
X
20
77
76
78
79
75
73
76.2
76.4
77.6
75.4
72.8
70.2
20
79
78
77
80
77
76
20
79
77
78
79
77
70
40
31
26
36
29
29
23
40
36
28
28
27
22
30
X
77.8
77.5
78.0
78.8
76.8
73.3
40
35
32
27
18
31
16
40
45
20
32
24
33
25
40
78
78
77
73
77
70
40
39
24
30
10
32
22
40
75
78
78
76
75
69
X
40
77
75
76
73
74
75
37.2
26.0
30.6
21.6
29.4
23.2
40
78
76
75
74
72
72
X
77.0
76.8
76.5
74.0
74.5
71.5
12
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