Table 4.

Chemical resistance of the nanocomposites and pristine polymer

Sample code	10% NaCl	20% EtOH	5% HCl	2% NaOH	Water
HBPU	−0.022	−0.013	0.008	−0.035	0.016
HBPU1	−0.012	−0.005	0.004	−0.021	0.009
HBPU2.5	−0.007	−0.003	0.002	−0.023	0.011
HBPU5	−0.004	−0.002	0.006	−0.022	0.014