dextran 275,000 to 2,000,000 MW

wt%		log P (dynes/cm^2)

2.0		4.03
3.0		4.20
5.0		4.68
6.0		4.85
8.0		5.08
12.0		5.42
17.0		5.77
20.0		5.94
25.0		6.27
28.5		6.51
32.5		6.67
39.3		6.99
14.8		5.65
17.5		5.87
19.8		5.98
20.8		6.00
25.0		6.27	
28.6		6.41
30.5		6.54
32.2		6.62
35.7		6.77
5.6		4.71
9.0		5.07
16.5		5.73

An equation that fits this data is the following.

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

where a = 2.48, b = 1.22 and c = 0.35

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