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Abstract

Polymerization of acrylic acid (AA) with native locust bean gum (LBG) was carried out with the use of the peroxydiphosphate (PDP)/Fe²⁺(FAS) redox initiation system. The factors affecting the efficiency of the redox system and the polymerization process were studied. These factors included the concentration of AA, PDP, FAS, duration of reaction, and polymerization temperature. The polymerization reaction was studied with respect to percentage of total conversion (TC), whereas the resultant polymerization product (i.e., composite) was analyzed for the polymer yield. The latter refers to the percentages of the graft yield (GY), the graft efficiency (GE), homopolymer (HP) and total conversion (TC). The apparent viscosity of the composite at different rates of shear was also examined. The characteristic of the grafted product was evaluated by thermal decomposition TGA in the temperature range (0—700°C). Tentative mechanisms, including different chemical events that can occur thoughout the whole course of polymerization process, are reported.

Keywords

locust bean gum (LBG)characterization grafting acrylic acid peroxydiphosphate (PDP).

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References

Maier, M. , Androson, M. , Karl, C. and Magnuson, K. ( 1993). Guar, Locust Bean, Tara and Fenugreek Gums, In; Industrial Gums: Polysaccharides and their Derivatives, 3rd edn, Whistley, R. l. and BeMiller, J. N. (Eds) Academic Press , New York, pp. 205-213.

Elfak, A.M. , Pass, G. and Phillips, G.O. ( 1979). The Effect of Shear Rate on the Viscosity of Solutions of the Guar Gum and Locust Bean Gum, J. Sci. Food Agric., 30: 439-444.

Garcia-Ochoa, F. and Cassas, J.A. (1992). Viscosity of Locust Bean (Ceratonia Siliqua) Gum Solutions, J. Sci. Food Agric. , 59: 97-100.

Camacho, M.M. , Martinez-Navarrete , N. and Chiralt, A. (2005). Rheological Characterization of Experimental Dairy Cream Formulated with LOCUST Bean Gum and λ-Carrageenan Combinations, Intern. Dairy J., 15: 243-248.

Dea, I.C.M. and Morrison, A. (1975). Chemistry and Interaction of Galactomannas, Ads Carbohydr. Chem. Biochem., 31: 241-312.

Rol, F. Locust Bean Gum, Industrial Gums, (2nd edn), Edited by Whistler R. L. , Academic Press, New York, pp. 361-375.

Azero, E.G. and Andrade, C.T. ( 2002). Testing Procedures for Galactomannan Purification, Polymer Testing, 21: 551-556.

Doinik, V. , Gurske, W.A. and Padua, A. ( 2001). Galactomannans as Sieving Matrix in Capillary Electrophoresis , Electrophoresis, 22: 707-719.

Aspinall, G.O. ( 1983). The Polysaccharides (vol. 2). Acadimic Press, New York, pp. 92-193 and 412-490.

10.

Dey, M.P. (1978). Biochemistry of Plants Galactomannans, Adv. Carbohydr. Chem. Biochem., 35: 341-376.

11.

Hirst, E.L. , and Jones, J.K.N. (1948). The Galactomannans Carob Seed Gum, J. Chem. Soc., 1278-1282.

12.

Smith, F. ( 1968). The Constitution of Carob Gum, J. Am. Chem. Soc., 70: 3249-3235.

13.

Dea, I.C.M. , Clark, A.H. and McCleary, B.V. (1986). Effect of Galactose Substitution Patterns on the Interaction Properties of Galactomannans, Carbohyd . Res., 147: 275-294.

14.

Hui, P.A. and Neukon, H. (1964). Some Properties of Galactomannans . Tappi J., 47: 39-42.

15.

McCleary, B.V. and Amado, R. (1981). Effect of Galactose Content on the Solution and Interaction Properties of Guar and Carob Galactomannas . Carbohyd. Res., 92: 269-285.

16.

Casas, J.A. and Garcia-Ochoa, F. (1999). Viscosity of Solutions of Xanthan/Locust Bean Gum Mixtures, J. Sci. of Agric., 79: 25-31.

17.

Richardson, P.H. , Clark, A.H. , Russel, A.L. , Aymard, P. and Norton, I.T. (1999). Galactomannan Gelatin: A Thermal and Rheological Investigation Analysed using the Cascade Model, Macromolecules, 32: 1519.

18.

Lozinsky, V.L. , Damshkaln, L.G. , Brown, R. and Norton, I.T. (2000). Study of Cryostructuring of Polymer Systems. XIX. On the Nature of Intermolecular Links in the Cryogels of Locust Bean Gum, Polym. Intern., 49: 1434-1443.

19.

Wallace, R.A. and Yang, D.G. (1966). Graft Polymerization Kinitcs of Acrylamide Initiated by Cerric Nitrate Dextran Redox System, J. Polym, Sci., Part A-1, 4: 1179.

20.

Pacsu, R. and Hiller, L.A. ( 1946). Cellulose Studies: VI. Determination of Carboxyl Groups in Cellulosic Materials, Text. Res. J., 16: 390.

21.

Nayak, P.L. , Lenk, S. and Mishra, M. (1980). Grafting Vinyl Monomers onto Rubber V. Graft Copolymerization of Methyl Methacrylate onto Wool using Peroxydiphosphate as Initiator, J. Appl. Polym. Sci., 25: 63.

22.

Naya, P.L. , Lenka, S. and Mishra, M. ( 1980). Grafting Vinyl Monomers onto Silk Fibers IX. Graft Polymerization of Methyl Methacrylate onto Silk Fibers using Peroxydiphosphate Thiourea Redox System, J. Polym. Sci. Chem., 18: 2247.

23.

Zahran, M.K. and Mahmoud, R.I. ( 2003). Peroxidiphosphate-Metal Ion Cellulose Thiocarbonate Redox System-Induced Graft Copolymerization of Vinyl Monomer onto Cotton Fabric , J. Appl. Polym. Sci., 87: 1879-1889.

24.

Kavita, T. and Kunj, B. ( 2000). Graft Copolymerization of Acrylic Acid onto Guar Gum , J. of Appl. Polym. Sci., 77: 39-44.

25.

Kok, M.S. , Hill, S.E. and Mitchell, J.R. (1999). Viscosity of Galactomannans During High Temperature Processing Influence of Degradation and Solubilisation , Food Hydrocolloids, 13: 535-542.

26.

Zahran, M.K. ( 1996). Graft Copolymerization of Methyl Methacrylate and other Vinyl Monomers onto Cotton Fabric using Ferrous Cellulose Thiocarbonate-N-bromosuccinimide Redox Initiation System, J. Appl. Polym. Sci., 62: 149.

Preparation and Characterization of Poly Acrylic Acid-Locust Bean Gum

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