Table 1. Density, Gel Fraction, Degree of Swelling of 1,4-H
6
XDI- and MDI-based PUEs
PU
Density (g/cm
3
)
Degree of swelling
Gel fraction (%)
Toluene
DMAc
*
Toluene
DMAc
*
HX-30-10/0
1.06
3.24
18.2
99.3
23.5
HX-30-8/2
1.04
3.80
5.48
99.6
98.9
HX-20-10/0
1.04
4.20
soluble
99.2
soluble
HX-20-8/2
1.03
5.09
6.83
99.4
97.9
N,N
-Dimethyl acetamide