Impact of Repetitive Recycling on Optical Properties of Virgin and Recycled Polypropylene Blends Based on Material Value Conservation Paradigm

Abstract:

Implementation of material value conservation (MVC) needs to be proven through research to determine impact upon plastic properties such as optical properties of virgin plastic and recycled plastic blends. Optical properties such as colour, transparency and gloss are important parameters for appropriate quality of plastic packaging. Degradation of optical properties occurs during recycling processes of plastic materials and the declining properties of recycled products could be improved by blending them with virgin materials. This research aims to reveal the impact of repetitive recycling on optical properties of virgin and recycled polypropylene (PP) blends based on MVC paradigm. The first step of this research was to determine composition of virgin PP and recycled PP blends. Proportion of 70% virgin PP and 30% recycled PP was selected as a blend composition. The next step of this research was repetitive recycling of virgin PP and recycled PP blends with implementation of MVC up to the 8^th recycling stage. The specimens of plastic blends were made from the 1^st, 2^nd, 4^th and the 8^th recycling stage and then their optical properties were tested with the American Society for Testing Materials (ASTM) methods. Generally, degradation level of optical properties will increase during the recycling processes. Testing results show a slightly change of colour properties. Degradation level of gloss properties is gradually increased by a maximum degradation level at the 8^th recycling stage as 17.46%. However, transparency had a maximum degradation level at the 4^th recycling stage as 20.93%. It means that the plastic blends can be used as viable raw materials based on their optical properties with more attention to the gloss. Furthermore, the implementation of MVC will provide more benefits through extending the life cycle of recycled products, reducing virgin plastic consumption, optimizing the use of plastic waste and reducing plastic waste generation.

• Periodical: Materials Science Forum (Volume 1020)
• Pages: 192-198
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1020.192
• Online since: February 2021
• Authors: Djoko Sihono Gabriel*, Roben Hotdysah Putra Saragih
• Keywords: Material Value Conservation, Optical Properties, Polypropylene, Repetitive Recycling

References

[1] V. Goodship, Plastic recycling, Science Progress, Vol. 90 no. 4 (2007) 245–268.

[2] T. Z. N. Sokkar, M. A. Shams El-Din and A. S. El-Tawargy, Effect of recycling on the optical, mechanical and structural properties of polypropylene fibers, Optics and Lasers in Engineering, Vol. 51 no. 8 (2013) 994–1003.

DOI: 10.1016/j.optlaseng.2013.02.018

[3] R. Geyer, J. R. Jambeck and K. L. Law, Production, use, and fate of all plastics ever made, Science Advances, Vol. 3 no. 7 (2017) 25–29.

DOI: 10.1126/sciadv.1700782

[4] N. M. Mehat and S. Kamaruddin, Optimization of mechanical properties of recycled plastic products via optimal processing parameters using the Taguchi method, Journal Materials Processing Technology, Vol. 211 no. 12 (2011) 1989–(1994).

DOI: 10.1016/j.jmatprotec.2011.06.014

[5] H. S. Tai and J. L. Yeh, Evaluation and verification of the virgin–recycled mixing ratio of polypropylene plastic, Journal of the Chinese Institute of Engineers, Transactions of the Chinese Institute of Engineers Series A, Vol. 41 no. 1 (2018) 69–75.

DOI: 10.1080/02533839.2017.1419074

[6] A. Sangroniz, J. B. Zhu, X. Tang, A. Etxeberria, E. Y. X. Chen, and H. Sardon, Packaging materials with desired mechanical and barrier properties and full chemical recyclability, Nature Communications, Vol. 10 no. 1 (2019) 1–7.

DOI: 10.1038/s41467-019-11525-x

[7] T. A. Oliveira, R. R. Oliveira, R. Barbosa, J. B. Azevedo, and T. S. Alves, Effect of reprocessing cycles on the degradation of PP/PBAT-thermoplastic starch blends, Carbohydrate Polymers, Vol. 168 (2017) 52–60.

DOI: 10.1016/j.carbpol.2017.03.054

[8] A. H. Ziadat and H. Mott, Assessing solid waste recycling opportunities for closed campuses, Management of Environmental Quality, An International Journal, Vol. 16 no. 3 (2005) 250–256.

DOI: 10.1108/14777830510591679

[9] H. A. Maddah, Polypropylene as a Promising Plastic: A Review, American Journal of Polymer Science, Vol. 6 no. 1 (2016) 1–11.

[10] S. Mbarek, Zaineb Baccouch, Olivier Eterradossi, Didier Perrin, Bernard Monasse, Helena Garay, Jean-Cristophe Quantin, Effect of recycling and injection parameters on gloss properties of smooth colored polypropylene parts: Contribution of surface and skin layer, Polymer Engineering and Science, Vol. 59 no. 6 (2019) 1288–1299.

DOI: 10.1002/pen.25112

[11] M. E. Grigore, Methods of recycling, properties and applications of recycled thermoplastic polymers, Recycling, Vol. 2 no. 4 (2017) 1–11.

DOI: 10.3390/recycling2040024

[12] E. M. Abdel-Bary, Handbook of Plastic Films, first ed., Rapra Technology, Shrewsbury, (2003).

[13] S.E.M. Selke and J. D. Culter, Plastic Packaging, Properties, Processing, Applications and Regulations, third ed., Hanser, Munich, (2016).

[14] A. Ammala, S. Bateman, K. Dean, E. Petinakis, P. Sangwan, S. Wong, Q. Yuan, L. Yu, C. Patrick, K.H Leong, An overview of degradable and biodegradable polyolefin, Progress in Polymer Science (Oxford), Vol. 36 no. 8 (2011) 1015-1049.

DOI: 10.1016/j.progpolymsci.2010.12.002

[15] D. S. Gabriel, How to increase plastic waste acceptance for mechanical recycling: An introduction to material value conservation and its phenomenon, Key Engineering Materials, Vol. 705 no. 24 (2016) 362–367.

DOI: 10.4028/www.scientific.net/kem.705.362

[16] D. S. Gabriel, M. Habiburrahman, and P. J. Endthen, Material value conservation: Development of design criteria for rigid plastic packaging, Material Science Forum, Vol. 936 MSF (2018) 110–115.

DOI: 10.4028/www.scientific.net/msf.936.110

[17] D. S. Gabriel and J. Maulana, Impact of plastic labelling, coloring and printing on material value conservation in the products of secondary recycling, Key Engineering Materials, Vol. 773 KEM (2018) 384–389.

DOI: 10.4028/www.scientific.net/kem.773.384

[18] D. S. Gabriel, B. A. J. Pratama, and C. Hapsari, Plastic packaging material value conservation and the structure of stakeholder role, Key Engineering Materials, Vol. 773 KEM (2018) 396–404.

DOI: 10.4028/www.scientific.net/kem.773.396

[19] D. S. Gabriel, D. Isnandar, and A. Jeremia, Plastic packaging material value conservation and evident of the consumers' acceptance, Key Engineering Materials, Vol. 773 KEM (2018) 390–395.

DOI: 10.4028/www.scientific.net/kem.773.390

[20] D. S. Gabriel and A. W. Anindityo, Development of stakeholder roles in supporting material value conservation of plastic packaging using brain-writing and interpretive process, International Journal of Technology, Vol. 8 no. 7 (2017) 1361–1370.

DOI: 10.14716/ijtech.v8i7.722

[21] R. Nurcahyo, D. S. Gabriel, and W. L. Ikhsan, Repetitive implementation of material value conservation and its effects on the mechanical properties of plastic recycling products, Material Science Forum, Vol. 936 MSF (2018) 116–120.

DOI: 10.4028/www.scientific.net/msf.936.116

[22] M. Esmaeilpour and A. Rajabi, The effect of environment-friendly attitude on consumer perception of usability of product packaging, Journal of Applied Packaging Research, Vol. 8 no. 2 (2016) 32-44.

[23] G. W. Curtzwiler, M. Schweitzer, Y. Li, S. Jiang, and K. L. Vorst, Mixed post-consumer recycled polyolefin as a property tuning material for virgin polypropylene, Journal of Cleaner Production, Vol. 239 (2019).

DOI: 10.1016/j.jclepro.2019.117978

[24] N. Azad and M. Masoumi, The impact of packaging on product competition, Management Science Letter, Vol. 2 no. 8 (2012) 2789–2794.

DOI: 10.5267/j.msl.2012.10.008

[25] R. Abrams, M. Ali, P. Denton, J. Igualada, M. Groen, E. Gschwind, Coloring plastics: fundamentals and trends, Plastic, Additives and Compounding, Vol. 3 no.7-8 (2001) 18-25.

DOI: 10.1016/s1464-391x(01)80218-x

[26] F. Pisciotti, A. Boldizar, M. Rigdahl, and I. Ariño, Effects of injection-molding conditions on the gloss and color of pigmented polypropylene, Polymer Engineering Science, Vol. 45 no. 12 (2005) 1557–1567.

DOI: 10.1002/pen.20358

[27] A. M. Sukhadia, D. C. Rohlfing, M. B. Johnson, and G. L. Wilkes, A comprehensive investigation of the origins of surface roughness and haze in polyethylene blown films, Journal of Applied Polymer Science, Vol. 85 no. 11 (2002) 2396–2411.

DOI: 10.1002/app.10874

[28] M.J. Kirwan and J.W. Strawbridge, Plastic in Food Packaging, in R.Coles (Eds), Food Packaging Technology, Blackwell Publishing, London, 2003, pp.174-240.

[29] F. De Santis and R. Pantani, Optical properties of polypropylene upon recycling, The Scientific World Journal, Vol. 2013 (2013).

DOI: 10.1155/2013/354093

[30] L. Rigamonti, M. Niero, M. Haupt, M. Grosso, and J. Judl, Recycling processes and quality of secondary materials: Food for thought for waste-management-oriented life cycle assessment studies, Waste Management, Vol. 76 (2018) 261–265.

DOI: 10.1016/j.wasman.2018.03.001

[31] S. Allahvaisi, Polypropylene in industry of food packaging, in: Fatih Doğan (Eds), Polypropylene in the Industry of Food Packaging, InTech Publishing, Rijeka, 2012, pp.3-22.

[32] W. Mokrzycki and M. Tatol, Color difference delta E - A survey, Machine Graphics and Vision, Vol. 20 no. 4 (2011) 383–411.

[33] A.M Baker and J.L Mead, Thermoplastic in: C.A. Harper (Eds), Handbook of Plastic Technologies, McGraw-Hill Companies, New York, 2006, p.2.1–2.69.

[34] R. Klein, Material properties of plastics, Laser Welding of Plastics, Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, (2011) p.3–69.