Intrinsic Viscosity and Flow Behaviour of Arabic Gum Aqueous Solutions

Figures & data

Table 1 Densities and kinematic viscosities for aqueous solutions of Arabic gum

[Polymer] / g·L^−1	ρ / g·cm^−3	ν / mm^2·s^−1
10	1.0050	1.0660
15	1.0068	1.1658
20	1.0087	1.2449
25	1.0105	1.3514
30	1.0123	1.4610

Figure 1 Determination of intrinsic viscosity of Arabic gum using Huggins and Kramer equations.

Figure 2 Effect of temperature and shear rate upon the apparent viscosity value. [AG] = 150 g·L⁻¹. 10°C (○), 20°C (•), 30°C (□), 40°C (▪]), and 50°C (Δ).

Figure 3 Experimental data fit using Ostwald model. [AG] = 150 g·L⁻¹: (○) T = 10°C; (•) T = 50°C; [AG] = 40 g·L⁻¹: (□) T = 10°C.

Figure 4 Influence of temperature upon the consistence index. (○) 0 g·L⁻¹; (•) 40 g·L⁻¹; (□) 100 g·L⁻¹; (▪) 150 g·L⁻¹; (Δ) 300 g·L⁻¹; (▴) 400 g·L⁻¹.

Figure 5 Influence of concentration and temperature upon consistency index.

Table 2 Flow behaviour index corresponding to Ostwald model

T /°C	[Polymer] / g·L^−1
	40	100	150	300	400
10	0.932	0.950	0.962	0.974	0.978
20	0.942	0.956	0.967	0.982	0.985
30	0.947	0.964	0.972	0.986	0.989
40	0.956	0.970	0.978	0.992	0.995
50	0.961	0.978	0.986	0.999	1.002

Table 3 Consistency index corresponding to Ostwald model

T /°C	[Polymer] / g·L^−1
	40	100	150	300	400
10	4.8	11.9	23.9	168.9	488.3
20	3.5	8.7	16.7	119.8	352.4
30	4.7	6.9	13.1	86.0	266.4
40	2.0	5.3	10.7	62.2	207.8
50	3.0	4.5	8.0	44.0	164.9

Figure 6 Influence of polymer concentration and temperature upon flow index. (○) T = 10°C; (•) T = 20°C; (□) T = 30°C; (▪) T = 40°C; (Δ) T = 50°C.