Preparation and Characterization of Polyurethane Nanocomposites Using Vietnamese Montmorillonite Modified by Polyol Surfactants

Table 4

Water absorption of PU/PEO-MMT and PU/PVA-MMT system.

Materials	Absorption uptake of water (wt%) after 122 hours
Modified clay; content (wt%)	0	1	3	5	7
PU/PEO-MMT	2.16	1.82	1.91	2.09	2.18
PU/PVA-MMT		1.68	1.71	1.77	2.10