Gizem CİHANOĞLU, Merve KARABIYIK, Iklima ODABASİ, Devrim BALKÖSE

Composition, Morphology, Optical, Thermal and Mechanical Properties of Yogurt Containers

The morphology, composition, optical, thermal and mechanical properties of two randomly selected commercial yogurt containers, container 1 and container 2 were determined using advanced analytical techniques in the present study. The container 1 which was based on polypropylene labelled as “5 “had 18.1 % CaCO3 and 1.2% TiO2. On the other hand container 2 which was based on polystyrene labelled as “6” had 1.2 % TiO2, CaCO3 and olivine. The melting point of container 1 was 166.4 oC and the glass transition point of container 2 was 99.9oC. The surface of the container 1 was smoother than the container 2 with the average surface roughness values of inside surfaces 10.3 and 19.4 nm respectively. Both containers were white in color and had very low values of light transmission. The samples had close values of tensile strength and tensile modulus. The presence of fillers made the containers had lower tensile strength and higher stiffness than their base polymers. the future recycling methods for yogurt packing materials. The containers labelled as “5 “and “6” should be collected separately from the source since they will have different processes for reuse.

Keywords:

Polypropylene Polystyrene, Calcite, Titanium dioxide, Composites,

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K. Mars ,B. Bugusu, “Food Packaging-Roles, Materials and Environmental Issues” J. Food Sci., vol. 72, no. 3, pp 39-55, Apr.2007.
A. Saint Eve, C. Levy, M. L. Moigne, V. Ducruet and I Souchon” Quality Changes in Yogurt during storage in different packing matrials,” Food Chem., vol. 110, No.2, pp 285-293, sep 2008.
P. Muniandy, A. B. Shori, A. S. Baba, “ Influence of green, white and black tea addition on the antioxidant activity of probiotic yogurt during refrigerated storage.” Food Packaging and Shelf Life, vol. 8, no 1, pp 1-8, Jun. 2016.
M.G. Sajilata, K. Savitha, R.S. Singhal, V.R. Kanetkar, “Scalping of flavors in packaged foods.” Comprehensive Reviews in Food Science and Food Safety, vol.6, no 1, pp 17–35 ,jan. 2007.
R. Coles, D. McDowell, M.J. Kirwan, Food Packaging Technolog, Oxford, UK: Blackwell Publishing Ltd., 2003.
E. Părpăriţă, R. N. Darie, C. Popescu, M.. A. Uddin, C. Vasile.”Structure-morphology-mechanical properties relationship of some polypropylene/lignocellulosic composites”, Mater. Des.,vol.56, pp763-772, Apr. 2014.
J. L., Dwyer, M. Zhou, “Polymer Characterization by Combined Chromatography-Infrared Spectroscopy.” Int. J. Spectro., vol 2011, Article ID 694645, Dec. 2011. http://doi.org/10.1155/2011/694645
Arkis, E.et.al. Characterization Of A Pearlescent Biaxially Oriented Multilayer Polypropylene Film. Chem. Chemical Techn., vol.91,no 1, pp. 77-84, Mar. 2015.
Smith, C.B., Fundementals of Fourier Transform Infrared Spectroscopy, Florida, USA: Taylor & Francis Group, 2011.
K Kaniappan, S.Latha, “Certain Investigations on the Formulation and Characterization of Polystyrene / Poly(methyl methacrylate) Blends.” I. J.Chem Tech Res., vol 3, no2, pp7.Apr.2011.
P. M Anbarasan,., S. Mohan “Vibrational spectra and assignments of cis- and trans-1,4-polybutadiene.” Turk. J. Chem., vol 26, no 1, pp 105-111, 2002.
M. Wang, et. al.,”Compression-rate dependence of solidified structure from melt in isotactic polypropylene.” J. Phys. D: Appl. Phys., vol.46 ,no 14, pp 145307 , 2013.
M.Obadal,R. Cermak, and S.Karel,”Tailoring of three-phase crystalline systems in isotactic poly(propylene),” Macromol Rapid Commun., vol. 26, no. 15, pp1253-1257, Aug. 2005 .
S. Ulku, D. Balköse, E.Arkış and M. Sipahioğlu. “A study of chemical and physical changes during biaxially oriented polypropylene film production,“ J. Polym. Eng.Vol.23, no 6, pp 437-456, nov. 2003.
Q. Zhang, Z. Yu, X. Xie and Y. Mai, “Crystallization and impact energy of polypropropylene/CaCO3 nanocomposites with nonionic modifier,” Polym.,Vol. 45, No 17, pp5985-5994. Aug. 2004.
E. Alsharaeh, A.A. Othman and M. Al-Dosar, “Microwave Irradiation Effect on the Dispersion and Thermal Stability of RGO Nanosheets within a Polystyrene Matrix,” Mater., Vol 7, No.7, pp 5212-5224, Jul. 2014.
N. Wu, et al. “Synthesis of network reduced graphene oxide in polystyrene matrix by a two-step reduction method for superior conductivity of the composite,” J. Mater. Chem.,vol. 22, no 33, pp 17254-17261, jun 2012.
K. Hu, Z. Cui, Y. Yuan, Q. Zhuang, T. Wang, X. Liu and Z. Han “Synthesis, Structure, and Properties of High-Impact Polystyrene/Octavinyl Polyhedral Oligomeric Silsesquioxane Nanocomposites,” Polym. Compos., Vol. 37, No. 4, pp1049-1055, 2016.
J. Li and M. Hitch,“ Characterization of the microstructure of mechanically-activated olivine using X-ray diffraction pattern analysis.” Miner. Eng.,Vol.86, pp24-33, 2016.
Z. Funke, C.Schwinger, R. Adhikari and J. Kressler, “Surface tension in polymer blends of isotactic Poly(propylene) and atactic Polystyrene,” Macromol. Mater. Eng., vol. 286, no 12, pp744-751. Dec. 2001.
Gedde, U. W., Polymer Physics. London, UK: Chapman and Hall, 1995.
Z. Guo, et. al. “Assistant effect of nano-CaCO3 particles on the dispersion of TiO2 pigment in polypropylene composites, ” J. Mater. Sci.,vol. 39, no. 8, pp2891 – 2893, Apr. 2004.
Matsuno, R. et. al. Polystyrene-grafted titanium oxide nanoparticles prepared through surface initiated nitroxide-mediated radical polymerization and their application to polymer hybrid thin films, Soft Mater., Vol 2, No 5, pp415-421, Mar.2006 .
Callister, W.D., Rethwisch, D.G. Materials Science and Engineering (8th ed,). New York, USA: John Wiley & Sons, Inc., 2011.
W.C.J Zuiderduin, C. Westzaan, . Huétink,and R.J. Gaymans, “Toughening of polypropylene with calcium carbonate particles,“ Polym. vol. 44, no. 1, pp 261-275, Jan 2003.