Table 5.

Saline and distilled water sorption of PU foams prepared with different chain extenders and various amounts of gelatin.

Symbol	Sorption (%)
	3rd day		7th day		14th day
	Saline	Distilled water	Saline	Distilled water	Saline	Distilled water
BDO chain extender
PU-1/BDO/G0	17 ± 4	Degradation	Degradation	Degradation	Degradation	Degradation
PU-1/BDO/G10	27 ± 1	16 ± 1	21 ± 2	10 ± 4	14 ± 2	8 ± 2
PU-1/BDO/G20	33 ± 6	26 ± 6	24 ± 2	23 ± 2	15 ± 7	19 ± 4
PU-1/BDO/G30	27 ± 1	20 ± 3	17 ± 1	16 ± 2	9 ± 1	13 ± 3
EHEE chain extender
PU-1/EHEE/G0	4 ± 1	6 ± 2	2 ± 1	3 ± 2	1 ± 1	2 ± 1
PU-1/EHEE/G10	7 ± 2	9 ± 1	3 ± 2	7 ± 1	2 ± 1	4 ± 1
PU-1/EHEE/G20	6 ± 2	13 ± 1	5 ± 1	9 ± 1	3 ± 1	6 ± 1
PU-1/EHEE/G30	4 ± 1	10 ± 1	2 ± 1	7 ± 2	1.6 ± 1	4 ± 2