Effect of Holding Time and Temperature of Hot Pressing on Tensile Strength of Biodegradable Plastic Made of Carrageenan

Fitrian Imaduddin, Palgunadi Sastra, Wijang Wisnu Raharjo, Putri Wullandari, Ridwan Ridwan

Abstract

The most significant environmental problem was caused by plastic. One way to handle plastic waste was using biodegradable plastic because it faster decomposes naturally. Biodegradable plastic can be made from carrageenan by the hot press method. This method can make biodegradable plastic with large dimensions. However, the plastic quality depended on the holding time, temperature, and pressure selected during the hot pressing process. Therefore, this research is conducted to determine the effect of holding time and temperature in the hot press process on the tensile strength of biodegradable plastic made from carrageenan. The composition of the biodegradable plastic material used was 35% carrageenan, 35% polyvinyl alcohol (PVA), and 30% glycerol. In the manufacture of composites, the holding time was varied: 10, 20, 30, and 40 minutes, as well as the process temperature varied from 100, 110, 120, and 130 °C. The tensile strength of the composite was observed through tensile testing using a Universal Testing Machine. FTIR, XRD, and SEM tests were also conducted to sharpen the analysis. The addition of holding time led to an increase in the tensile strength of biodegradable plastics. The highest tensile strength was obtained at a holding time of 30 minutes with a value of 4.45 MPa. After 30 minutes, the tensile strength of the biodegradable composite decreased. Meanwhile, the addition of process temperature caused a decrease in the tensile strength of biodegradable plastics. The highest tensile strength was obtained at a process temperature of 100 °C with a value of 5.28 MPa.

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References

[1] P. Das and P. Tiwari, "Valorization of packaging plastic waste by slow pyrolysis," Resources, Conservation and Recycling, vol. 128, no. June 2017, pp. 69–77, 2018.

[2] F. P. la Mantia and M. Morreale, "Green composites: A brief review," Composites Part A: Applied Science and Manufacturing, vol. 42, no. 6, pp. 579–588, 2011.

[3] R. K. Singh and B. Ruj, "Time and temperature depended fuel gas generation from pyrolysis of real world municipal plastic waste," Fuel, vol. 174, pp. 164–171, 2016.

[4] T. L. Wu, Y. C. Chien, T. Y. Chen, and J. H. Wu, "The influence of hotpress temperature and cooling rate on thermal and physicomechanical properties of bamboo particle-polylactic acid composites," Holzforschung, vol. 67, no. 3, pp. 325–331, 2013.

[5] V. Gulitah and K. Chiang Liew, "Effect of Plastic Content Ratio on the Mechanical Properties of Wood-Plastic Composite (WPC) Made From Three Different Recycled Plastic and Acacia Fibres," Transactions on Science and Technology, vol. 5, no. 2, pp. 184–189, 2018.

[6] L. Mao, S. Imam, S. Gordon, P. Cinelli, and E. Chiellini, "Extruded Cornstarch–Glycerol–Polyvinyl Alcohol Blends: Mechanical Properties, Morphology, and Biodegradability," J. Polym. Envir., vol. 8, no. 4, pp. 205–211, 2000.

[7] J. H. Lin, Z. I. Lin, Y. J. Pan, C. T. Hsieh, C. L. Huang, and C. W. Lou, "Thermoplastic polyvinyl alcohol/multiwalled carbon nanotube composites: Preparation, mechanical properties, thermal properties, and electromagnetic shielding effectiveness," Journal of Applied Polymer Science, vol. 133, no. 21, pp. 1–10, 2016.

[8] B. B. Sedayu, M. J. Cran, and S. W. Bigger, "Effects of surface photocrosslinking on the properties of semi-refined carrageenan film," Food Hydrocolloids, vol. 111, no. April 2020, p. 106196, 2021.

[9] S. Akhmad and A. Arendra, "Development of Hot Press Molding for HDPE Recycling and Process Characterization," vol. 1, no. Icst, pp. 925–928, 2018, doi: 10.2991/icst-18.2018.186.

[10] Y. Srithep, P. Nealey, and L. S. Turng, "Effects of annealing time and temperature on the crystallinity and heat resistance behavior of injection-molded poly(lactic acid)," Polymer Engineering and Science, vol. 53, no. 3, pp. 580–588, 2013.

[11] G. Kiran, K. Suman, N. Rao, and R. Rao, "A study on the influence of hot press forming process parameters on mechanical properties of green composites using Taguchi experimental design," International Journal of Engineering, Science and Technology, vol. 3, no. 4, pp. 253–263, 2011.

[12] J. Huang, M. Wei, R. Ren, H. Li, S. Liu, and D. Yang, "Morphological changes of blocklets during the gelatinization process of tapioca starch," Carbohydrate Polymers, vol. 163, pp. 324–329, 2017.

[13] R. Handayani and M. Yuniwati, “Pengaruh Suhu Dan Waktu Terhadap Kuat Tarik Pada Proses Pembuatan Plastik Dari Ganas (Gadung Dan Serat Daun Nanas),” Journal of Chemical Information and Modeling, vol. 3, no. 1, pp. 16–21, 2018.

[14] S. Haryati, A. S. Rini, and Y. Safitri, “Pemanfaatan biji durian sebagai bahan baku plastik biodegradable dengan plasticizer gliserol dan bahan pengisi CaCO3,” Jurnal Kimia, vol. 23, no. 1, pp. 1–8, 2017.

DOI: https://doi.org/10.20961/mekanika.v21i2.64292

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