Table 2.

A comparison of the experimental and ideal viscometric parameters of the Ch + PVA blends and dependence on the assumed definition of the ideal values of these parameters

w ch	${[\mathit{\eta }]}_{\text{m}}^{\exp }$ (dL·g−1)	${\left[\mathit{\eta }\right]}_{\text{m}}^{\text{id}}$ (dL·g−1)	$\mathrm{\Delta }\left[\mathit{\eta }\right]$	$b_{\text{m}}^{\exp }$ (dL·g−1)2	$b_{\text{m}}^{{\text{id}}^{\ast }}$ (dL·g−1)2	$\mathrm{\Delta }{b}_{\text{m}}$	$b_{\text{m}}^{{\text{id}}^{\ast \ast }}$ (dL·g−1)2	$\mathrm{\Delta }{b}_{\text{m}}$
Ch I/PVA(88)
0.10	0.99 ± 0.02	0.92 ± 0.02	0.07	0.30 ± 0.040	0.37 ± 0.04	−0.07	0.22 ± 0.031	0.08
0.25	1.33 ± 0.02	1.28 ± 0.02	0.05	0.67 ± 0.095	0.65 ± 0.09	0.02	0.33 ± 0.046	0.34
0.50	1.92 ± 0.03	1.90 ± 0.03	0.03	1.30 ± 0.180	1.30 ± 0.18	0.00	0.84 ± 0.120	0.46
0.75	2.41 ± 0.04	2.51 ± 0.05	−0.09	2.10 ± 0.300	2.10 ± 0.30	0.00	1.80 ± 0.300	0.30
Ch II/PVA(88)
0.20	2.45 ± 0.02	2.48 ± 0.02	−0.03	1.85 ± 0.26	1.79 ± 0.25	0.06	1.12 ± 0.16	0.73
0.40	4.26 ± 0.04	4.19 ± 0.05	0.07	5.80 ± 0.81	5.12 ± 0.72	0.68	4.12 ± 0.58	1.68
0.50	5.16 ± 0.04	5.05 ± 0.05	0.11	8.50 ± 1.20	7.42 ± 1.04	1.08	6.38 ± 0.89	2.12
0.60	5.96 ± 0.06	5.91 ± 0.06	0.05	11.4 ± 1.60	10.2 ± 1.43	1.20	9.15 ± 1.28	2.25
0.80	7.88 ± 0.07	7.63 ± 0.08	0.25	19.9 ± 2.79	16.9 ± 2.37	3.00	16.23 ± 2.27	3.67
Ch II/PVA(99)
0.20	2.69 ± 0.03	2.58 ± 0.03	0.11	2.16 ± 0.29	2.14 ± 0.29	0.02	1.22 ± 0.17	0.95
0.40	4.33 ± 0.13	4.27 ± 0.06	0.06	6.38 ± 0.89	5.55 ± 0.78	0.83	4.17 ± 0.58	1.38
0.50	5.40 ± 0.06	5.12 ± 0.07	0.28	9.05 ± 1.27	7.85 ± 1.10	1.20	6.42 ± 0.90	1.43
0.60	6.24 ± 0.06	6.00 ± 0.06	0.24	11.68 ± 1.64	10.56 ± 1.48	1.12	9.18 ± 1.29	2.50
0.80	8.08 ± 0.08	7.66 ± 0.10	0.42	18.94 ± 2.65	17.16 ± 2.40	1.78	16.24 ± 2.27	0.92

Solvent: 0.1 mol·dm⁻³ CH₃COOH + 0.2 mol·dm⁻³ NaCl. $b_{\text{m}}^{{\text{id}}^{\ast }}$ determined according to Krigbaum and Wall [8], $b_{\text{m}}^{{\text{id}}^{\ast \ast }}$ determined according to Garcia et al. [14]

w _Ch the weight fraction of chitosan