polyethylene glycol MW 300

wt%     	log P (dynes/cm^2)

2.6		6.36
5.0		6.73
10.0		7.00
15.0		7.23
20.0		7.41
25.0		7.57
30.0		7.71

An equation that fits this data is the following.

log P = a + b * (wt%) ^ c

where a = 4.79, b = 1.28 and c = 0.24

Note that it should be applied only over the range of pressures measured.

PEG400 osmotic pressure and its temperature dependance

1) PEG400 osmotic pressure vs. molality at different temperatures

Please use the following reference when using this data. 

Reference - https://doi.org/10.1002/pro.4573. Osmotic pressure was calculated from the water activity data in table S4. 

2) PEG400 Osmotic pressure data (atm)

Reference - see Peter Rand.

PEG400 Osmotic pressure data (dyn/cm^2)

wt%     log P (dynes/cm^2)

2.5      6.3
5         6.55
10       6.93
15       7.14
20       7.33
25       7.5
30       7.65

An equation that fits this data is the following.

log P = a + b * (wt%) ^ c where a = 5.29, b = 0.73 and c = 0.34

Note that it should be applied only over the range of pressures measured.

polyethylene glycol MW 600

wt%		log P (dynes/cm^2)

2.5		6.22
5.0		6.43
10.0		6.80
15.0		7.01
20.0		7.20
25.0		7.38
30.0		7.53
35.0		7.68	
5.0		6.15
10.0		6.72
15.0		6.96
20.0		7.13
25.0		7.30
30.4		7.42
35.2		7.57
40.5		7.64
45.0		7.92
61.5		8.35
67.5		8.49
45.0		7.92
40.0		7.80
5.0		6.34

An equation that fits this data is the following.

log P = a + b * (wt%) ^ c

where a = 5.63, b = 0.33 and c = 0.51

Note that it should be applied only over the range of pressures measured.

	

polyethylene glycol MW 1000

wt%		log P (dynes/cm^2)

5.0		6.07
10.0		6.61
15.0		6.82
20.0		7.08
25.0		7.34
30.0		7.46
35.0		7.55
40.0		7.65
45.0		7.79
50.0		7.89
55.0		7.93
60.0		7.95	
2.5		6.11
5.0		6.27
10.0		6.54
15.0		6.86
20.0		7.05
25.0		7.26
30.0		7.43
35.0		7.58

An equation that fits this data is the following.

log P = a + b * (wt%) ^ c

where a = 4.87, b = 0.80 and c = 0.34

Note that it should be applied only over the range of pressures measured.

	

polyethylene glycol MW 1500

wt%		log P (dynes/cm^2)

5.0		5.92
10.0		6.49
15.0		6.78
20.0		6.89
25.0		7.27
30.0		7.41
35.0		7.38
40.0		7.60
45.0		7.63
50.0		7.83
60.0		8.03
5.0		6.18
10.0		6.52
15.0		6.76
20.0		6.97
25.0		7.18
30.0		7.36
35.0		7.53

An equation that fits this data is the following.

log P = a + b * (wt%) ^ c

where a = 3.72, b = 1.57 and c = 0.24

Note that it should be applied only over the range of pressures measured.

polyethylene glycol MW 2000

wt%		log P (dynes/cm^2)

5.0		6.20
10.0		6.39
15.0		6.70
20.0		6.91
25.0		7.13
30.0		7.32
35.0		7.49
40.0		7.66	
9.9		6.32
15.0		6.60
20.0		6.95
25.0		7.09
30.0		7.28
34.7		7.40	
5.0		6.04
10.0		6.37
15.0		6.79
20.0		6.94	
10.0		6.38
20.0		6.90
30.0		7.32
40.0		7.66
5.0		6.15
5.0		6.14
15.0		6.66
15.0		6.65
15.0		6.63
15.0		6.68
25.0		7.1
25.0		7.11	
35.0		7.50	
35.0		7.51

An equation that fits this data is the following.

log P = a + b * (wt%) ^ c

where a = 5.60, b = 0.18 and c = 0.67

Note that it should be applied only over the range of pressures measured.

polyethylene glycol MW 3000

wt%		log P (dynes/cm^2)

10.0		6.26
15.0		6.61
20.0		6.84
25.0		7.07
30.0		7.28
35.0		7.46

An equation that fits this data is the following.

log P = a + b * (wt%) ^ c

where a = 4.42, b = 0.74 and c = 0.40

Note that it should be applied only over the range of pressures measured.

polyethylene glycol MW 4000

wt%		log P (dynes/cm^2)

5.0		5.98
10.0		6.29
15.0		6.64
20.0		6.86
25.0		7.11
30.0		7.23
35.0		7.40

An equation that fits this data is the following.

log P = a + b * (wt%) ^ c

where a = 4.93, b = 0.50 and c = 0.45

Note that it should be applied only over the range of pressures measured.

polyethylene glycol MW 6000

wt%		log P (dynes/cm^2)

10.0		6.23
15.0		6.51
20.0		6.79
25.0		7.02
30.0		7.23
35.0		7.43

An equation that fits this data is the following.

log P = a + b * (wt%) ^ c

where a = 5.12, b = 0.28 and c = 0.59

Note that it should be applied only over the range of pressures measured.

	

PEG 8000 Osmotic Pressure Data at various temperatures

PEG8000 Osmotic pressure data, (atm)

polyethylene glycol MW 10,000

wt%		log P (dynes/cm^2)

10.0		6.16
15.0		6.45
20.0		6.75
25.0		7.00
30.0		7.24
35.0		7.43

An equation that fits this data is the following.

log P = a + b * (wt%) ^ c

where a = 4.99, b = 0.29 and c = 0.60

Note that it should be applied only over the range of pressures measured.

polyethylene glycol MW 20,000

wt%		log P (dynes/cm^2)

1.5		4.59
2.9		4.98
3.6		5.15
4.7		5.34
5.8		5.55
6.3		5.63
7.1		5.76
9.0		5.89
12.1		6.08
13.1		6.18
14.2		6.29
16.0		6.47
18.3		6.70
18.8		6.68
20.8		6.77
21.6		6.83
22.2		6.83
22.8		6.94
19.0		6.68
22.1		6.83
23.7		6.93
25.0		6.94
26.2		7.03
28.8		7.11
32.7		7.26
34.8		7.34
35.6		7.32
38.0		7.45
39.5		7.48
41.7		7.54
43.2		7.59
45.5		7.67
47.5		7.73

An equation that fits this data is the following.

log P = a + b * (wt%) ^ c

where a = 1.57, b = 2.75 and c = 0.21

Note that it should be applied only over the range of pressures measured.

polyethylene glycol MW 20,000
	At a Temperature of 7-8 degrees C

wt%		log P (dynes/cm^2)

15.3		6.56
17.8		6.75
18.3		6.79
19.5		6.82
20.8		6.91
21.3		6.92
22.9		6.99
23.2		7.00
24.3		7.04

METHYLATED polyethylene glycol MW 2000

wt%		log P (dynes/cm^2)

10.3		6.48
15.1		6.72
24.8		7.20
35.5		7.45

An equation that fits this data is the following.

log P = a + b * (wt%) ^ c

where a = 1.34, b = 3.66 and c = 0.14

Note that it should be applied only over the range of pressures measured.