Effect of Starch Content on the Physico- Mechanical Properties of Recycled Polypropylene/Sweet potato Thermoplastic Starch Blend

  IJETT-book-cover  International Journal of Recent Engineering Science (IJRES)          
© 2020 by IJRES Journal
Volume-7 Issue-2
Year of Publication : 2020
Authors : M.I. Uzochukwu, T.E omobolanle, E.O Achukwu, I. Akawu


MLA Style: M.I. Uzochukwu, T.E omobolanle, E.O Achukwu, I. Akawu "Effect of Starch Content on the Physico- Mechanical Properties of Recycled Polypropylene/Sweet potato Thermoplastic Starch Blend" International Journal of Recent Engineering Science 7.2(2020):30-35. 

APA Style: M.I. Uzochukwu, T.E omobolanle, E.O Achukwu, I. Akawu. Effect of Starch Content on the Physico- Mechanical Properties of Recycled Polypropylene/Sweet potato Thermoplastic Starch Blend  International Journal of Recent Engineering Science, 7(2),30-35.

Recycled polypropylene bottles (RPPB)/ thermoplastic sweet potatoes starch (TSPPS) with compatibiliser (polypropylene –grafted- maleic anhydride) was prepared by melt blending on the two roll mill, and effect of the thermoplastic starch loading of 0,10,20,30,40 and 50wt% (sample A-F) on the physical and mechanical properties of the blend has been reported. Starch from sweet potato peel was treated with 0.16% aqueous solution of sodium hydrogen sulphite as a preservative. pH, Ash content, moisture content and FTIR were used to characterise the produced sweet potatoes peel starch. Hardness, tensile strength and percentage elongation at break properties decrease as the thermoplastic starch content increases from 0-50wt. %. The impact strength was found to be improved at sample C (20wt%) as thermoplastic starch content increases when compared to the control sample (sample A) while the modulus of elasticity, density and water absorption results shows that there was an increase in these properties as thermoplastic starch content increases. Biodegradation result of the blend upon soil burial for 98 days shows that the higher the starch content in the blend, the faster the rate of degradation.

[1] W. Liu, Y.-J. Wang, and Z. Sun, (2003). “Effects of polyethylene grafted maleic anhydride (PE-g-MA) on thermal properties, morphology, and tensile properties of low-density polyethylene (LDPE) and corn starch blends,” Journal of Applied Polymer Science, vol. 88, no. 13, pp. 2904–2911.
[2] Żuchowska, D. Hlavata, D. Steller, R. Adamiak, W. and W. Meissner, (1995). “Physical structure of polyolefin-starch blends after ageing,” Polym. Degrad. Stabil. 64, 339-346.
[3] Utracki L. (1999). A Polymer Blend handbook vol.1 Kluwer Academics Publishing, London
[4] Markovic.G, Visakh P. (2017). In recent development in polymer macro, micro and Nano blends.
[5] Averous L., Fauconnier N., Moro L., and Fringant C., (2000). “Blends of thermoplastic starch and polyesteramide: processing and properties,” Journal of Applied Polymer Science, vol. 76, No. 7, pp. 1117–1128.
[6] Obasi H.C, Onuoha F.N, Eze I.O, Nwanonenyi S.C, Arukalam I.O, Uzoma PC,"Effect of soil burial on properties of polypropylene (pp)/plasticised potato starch (pps) blends", The International Journal Of Engineering And Science (IJES) ,Vol.2 ,Issue. 8, PP. 14-18.
[7] Atozplastic.com, retrieved 16/03/2020
[8] Chandra R.and Rustgi R., Biodegradable Polymers, Elsevier Science Ltd, pp. 1273-1335, 1998
[9] Viswanath V., (2010). Degradation studies of polypropylene fibers and nonwovens with prodegradant additives. North Carolina State University.
[10] DeLeo CL, (2010). Reactively Compatibilised Starch-Based Renewable Polymer Blends. Swanson School of Engineering, University of Pittsburgh.
[11] FAOSTAT FDC, (2015).Sweet potatoes peel production in Nigeria
[12] Akbar H.D.A, Sri P., Myrtha K., Oceu D.P and Rani HF (2018). Fabrication and characterisation of sweet potaro-based bioplastic plasticised with glycerol. Journal of Biological SciencesISSN 1727-3048 DOI: 10.3923/jbs.2019.57.64
[13] Kaur M., Singh N., Sandhu K. S., Guraya H. S. (2004).Physicochemical, morphological, thermal and rheological properties of starches separated from kernels of some Indian mango cultivars (Mangifera indica L.) Food Chemistry 85- 131– 140
[14] Favis BD, Rodriguez F, Ramsay BA. (2003). Polymer compositions containing Thermoplastic starch. United States patent 6,605,657 issued August 12, 2003
[15] Rowe. RC, Sheskey, PJ and Quinn, M.E. (2009). Handbook of Pharmaceutical excipients. Sixth Edition
[16] Oko A. O. Famurewa A. C. and Nwaza J. O. (2015). Proximate Composition, Mineral Elements and Starch Characteristics: Study of Eight (8) Unripe Plantain Cultivars in Nigeria6(3): 285-294, Article no.BJAST.2015.087 ISSN: 2231-0843
[17] Pelissari FM, Andrade-Mahecha MM, Sobral PA, Menegalli FC. SN (2011).Isolation and characterisation of flour and starch of plantain banana (Musa paradisiaca). Starch/Stärke.; 64:382-391. DOI:10.1002/star.201100133
[18] Fang JM, Fowler PA, Tomkinson J, Hill CAS (2002).The preparation and characterisation of series of chemically modified potato starches. Carbohydr Polym 47:245–252
[19] Santha N., Sundha K.G, Vijayakumari K.P, Nayar V.U, Moorthy SN (1990). Raman and infrared spectra of starch samples of sweet potato and cassava. Proc.indian.Aca.Sci. (Chem. Sci.), Vol102, No.5, Pp.705-712
[20] Sunrendra A. Babu (2014). Chemical and structural properties of sweet potatoes starch treated with oaganic and inorganic acid Journal of Food Science and Technology -Mysore- · November 2014. DOI: 10.1007/s13197-014-1650-x
[21] Kormin S., Kormin F., M D H Beg, M B M Piah (2017).Physical and mechanical properties of LDPE incorporated with different starch sources. IOP Publishing IOP Conf. Series: Materials Science and Engineering 226 012157 doi:10.1088/1757- 899X/226/1/012157
[22] Srabayeetab.R. Ramaraj B., Subhas CS, (2011). Polypropylene and potato starch bicomposites: physico-mechanical properties and thermal properties, journal of Applied polymer science 120 (5):3078-3086; jue 211.DOi:10.1002/app,33486
[23] Obasi, H. C., and Igwe, I. O. (2014). Effects of Native Cassava Starch and Compatibilizer on Biodegradable and Tensile Properties of Polypropylene American Journal of Engineering Research (AJER) e-ISSN: 2320-0847 p-ISSN: 2320-0936 Volume-03, Issue-02, pp-96-104
[24] Yew G.H., Mohd Yusuf A.M., Mohd Ishak Z.A. and Ishiaku U.S. (2005). Water absorption and enzymatic degradation of poly (lactic acid)/rice starch composites. Polym. Degrad. Stab. 90(3), 488 – 500.
[25] Balakrishna N.S., Ismail H. and Othman N. (2012). The Effects of Rattan Filler Loadings on Properties of Rattan Power-Filler Polypropylene Composites. BioResources 7(4), 5677 – 5690

Compatibilizer, Physico- mechanical properties, Thermoplastic starch. Polypropylene, Polymer blend