Effect of Acid-Hydrolyzed Thermoplastic Starch on the Mechanical, Thermal and Morphological Properties of Polyethylene Based Composites
DOI:
https://doi.org/10.6000/1929-5995.2015.04.04.4Keywords:
Chemical modifications, LDPE, hydrolyzed thermoplastic starch.Abstract
The effect of the addition of hydrolyzed thermoplastic maize starch on the physico mechanical properties of low-density polyethylene (LDPE)-based composites was studied. Acid-hydrolyzed native starch was thermoplasticized using 15 and 30% glycerol in weight relative to starch, after which the LDPE/thermoplastic starch (TPS) composites were prepared at TPS concentrations of 10, 25, and 50%. According to the results of Raman spectroscopy, the appearance of a new band at 756 cm-1 was observed, and it was attributed to the hydrolysis process and associated with the C-C-O vibrational modes of the glycosidic bond. The addition of both native and polyethylene hydrolyzed TPS reduced the Young’s modulus of the composites; but the reduction was greater for those containing native starch. Both the maximum stress and deformation decreased to a greater degree for the composites with hydrolyzed TPS. The composites containing TPS prepared with 15% glycerol exhibited a higher Young’s modulus compared to those with LDPE, although they exhibited fragile behavior. The degree of matrix crystallinity increased with the addition of TPS and showed the largest increase when TPS 50% hydrolyzed by weight was added, showing an increase of 35%. It was observed that the size of the TPS particles, both native and hydrolyzed, increased in size as the concentration of TPS in the matrix increased. The size of the hydrolyzed TPS particles was greater than that of the native TPS particles, and in the case the of the hydrolyzed TPS particles, some exhibited an ellipsoidal and/or fibrillar morphology.
References
Hood LF. Current concepts of starch structure. In Food Carbohydrates, Lineback, DR, Inglett GE,editores. Avi Publishing Co. Inc, Westport, C.T. EUA. 1982; pp. 217-36.
Belitz HD, Grosch W, Schieberle P. Food Chemistry. 4ªed. Springer –Verlag Berlin Heidelberg 2009; pp. 249-60.
Gao J, Vasanthan T, Hoover R, Li J. Structural modification of waxy, regular, and high-amylose maize and hulless barley starches on partial acid hydrolysis and their impact on physicochemical properties and chemical modification. Starch/Stärke 2012; 64: 313-25. http://dx.doi.org/10.1002/star.201100128 DOI: https://doi.org/10.1002/star.201100128
Huber KC, BeMiller JN. Location of sites of reaction within starch granules. Cereal Chem 2001; 78: 173-80. http://dx.doi.org/10.1094/CCHEM.2001.78.2.173 DOI: https://doi.org/10.1094/CCHEM.2001.78.2.173
Avérous L, Moro L, Dole P, Fringant C. Properties of thermoplastic blends: starch-polycaprolactone. Polymer 2000; 41: 4157-67. http://dx.doi.org/10.1016/S0032-3861(99)00636-9 DOI: https://doi.org/10.1016/S0032-3861(99)00636-9
Avérous L, Faunonnier N, Moro L, Fringant C. Blends of thermoplastic starch and polyesteramide: Processing and properties. J Appl Polym Sci 2000; 76: 1117-28. http://dx.doi.org/10.1002/(SICI)1097-4628(20000516)76:7<1117::AID-APP16>3.0.CO;2-W DOI: https://doi.org/10.1002/(SICI)1097-4628(20000516)76:7<1117::AID-APP16>3.0.CO;2-W
Walia PS, Lawton JW, Shogren RL. Mechanical properties of thermoplastic starch/poly (hydroxy ester ether) blends: effect of moisture during and after processing. J Appl Polym Sci 2002; 84: 121-31. http://dx.doi.org/10.1002/app.10271 DOI: https://doi.org/10.1002/app.10271
Kaseem M, Hamad K, Deri F. Thermoplastic starch blends: a review of recent works. Polym Sci Series A 2012; 54: 165-76. http://dx.doi.org/10.1134/S0965545X1202006X DOI: https://doi.org/10.1134/S0965545X1202006X
Huneault MA, Li H. Preparation and properties of extruded thermoplastic starch/polymer blends. J Appl Polym Sci 2012; 126: E96-108. http://dx.doi.org/10.1002/app.36724 DOI: https://doi.org/10.1002/app.36724
Rodríguez González FJ, Ramsay BA, Favis BD. High performance LDPE/thermoplastic starch blends: a sustainable alternative to pure polyethylene. Polymer 2003; 44: 1517-26. http://dx.doi.org/10.1016/S0032-3861(02)00907-2 DOI: https://doi.org/10.1016/S0032-3861(02)00907-2
Méndez Hernández ML, Tena Salcido CS, Sandoval Arellano Z, González Cantú MC, Mondragón M, Rodríguez González FJ. The effect of thermoplastic starch on the properties of HDPE/TPS blends during UV-accelerated aging. Polym Bull 2011; 67: 903-14. http://dx.doi.org/10.1007/s00289-011-0501-4 DOI: https://doi.org/10.1007/s00289-011-0501-4
Favis BD, Rodríguez González FJ, Ramsay BA. Polymer Compositions Containing Thermoplastic Starch.United Statespatent US 6605657 2003 Aug.
Kiatkamjornwonga S, Thakeowb P, Sonsukc M. Chemical modification of cassava starch for degradable polyethylene sheets. Polym Degrad Stab 2001; 73: 363-75. http://dx.doi.org/10.1016/S0141-3910(01)00100-8 DOI: https://doi.org/10.1016/S0141-3910(01)00100-8
Ma XF, Yu JG. The plasticizers containing amide groups for thermoplastic starch. Carbohydr Polym Deg Stab 2004; 57: 197- 203. http://dx.doi.org/10.1016/j.carbpol.2004.04.012 DOI: https://doi.org/10.1016/j.carbpol.2004.04.012
Thomas DJ, Atwell WA. Starches practical guides for the food industry, St. Paul, Minnesota, USA 1997.
Hebeish A, El-Thalouth I, Refai R, Dokki AR. Synthesis and characterization of hypochlorite oxidized starches. Starch/Stärke 1989; 41: 293-8. http://dx.doi.org/10.1002/star.19890410804 DOI: https://doi.org/10.1002/star.19890410804
Bao M, Ersun A, Kavanç G. The evaluation of food hygiene knowledge, attitudes and practice of food handlers in food businesses in Turkey. Food Control 2006; 17: 317-22. http://dx.doi.org/10.1016/j.foodcont.2004.11.006 DOI: https://doi.org/10.1016/j.foodcont.2004.11.006
Day JT, Malzahn RC, Morehouse AL. Hydrolysis of starch. United Statespatent US3663369 A.1972 May.
Zambrano FM, Camargo CR. Substituto de gordura: efeito da concentração de ácido e do tempo de hidrólise do amido de mandioca em algumas características dos hidrolisados. Braz J Food Technol 1999; 2: 155-9.
Mark JE. Physical Properties of Polymer Handbook. AIP Press: New York 1996.
Almeida MR, Alves RS, Nascimbem LBLR, Stephani R, Poppi RJ, de Oliveira LFC. Determination of amylose content in starch using Raman spectroscopy and multivariate calibration analysis. Anal Bioanal Chem 2010; 397: 2693-701. http://dx.doi.org/10.1007/s00216-010-3566-2 DOI: https://doi.org/10.1007/s00216-010-3566-2
Tu AT, Lee J, Milanovich FP. Laser-Raman spectroscopic study of cyclohexaamylose and related compounds; spectral analysis and structural implications. Carbohydr Res 1979; 76: 239-44. http://dx.doi.org/10.1016/0008-6215(79)80023-3 DOI: https://doi.org/10.1016/0008-6215(79)80023-3
Sekkal M, Dincq V, Legrand P, Huvenne JPJ. Investigation of the glycosidic linkages in several oligosaccharides using FTIR and FT-Raman spectroscopies. Mol Struct 1995; 349: 349-52. http://dx.doi.org/10.1016/0022-2860(95)08781-P DOI: https://doi.org/10.1016/0022-2860(95)08781-P
Phillips DL, Xing J, Liu H, Pan DH, Corke H. Potential use of Raman spectroscopy for determination of amylose content in maize starch. Cereal Chem 1999; 76: 821-3. http://dx.doi.org/10.1094/CCHEM.1999.76.5.821 DOI: https://doi.org/10.1094/CCHEM.1999.76.5.821
Mortazavi S, Ghasemi I, Oromiehie A. Effect of phase inversion on the physical and mechanical properties of low density polyethylene/thermoplastic starch. Polym Test 2013; 32: 482-91. http://dx.doi.org/10.1016/j.polymertesting.2013.01.004 DOI: https://doi.org/10.1016/j.polymertesting.2013.01.004
Park JW, Kim GH, Moon JB. Effects of a compatibilizer on the tensile properties of low-density polyethylene/modified starch blends. J Environ Sci Int 2013; 22: 1287-94. http://dx.doi.org/10.5322/JESI.2013.22.10.1287 DOI: https://doi.org/10.5322/JESI.2013.22.10.1287
Willett JL. Mechanical properties of LDPE/Granular starch composites. J Appl Polym Sci 1994; 54: 1685-95. http://dx.doi.org/10.1002/app.1994.070541112 DOI: https://doi.org/10.1002/app.1994.070541112
Ratto JA, Stenhouse PJ, Auerbach M, Mitchell J, Farrel R. Procesing performance and biodegradability of a thermoplastic aliphatic polyester/starch system. Polymer 1999; 40: 6777-88. http://dx.doi.org/10.1016/S0032-3861(99)00014-2 DOI: https://doi.org/10.1016/S0032-3861(99)00014-2
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