Study of Improved Crack Toughness of Unsaturated Polymers with Rice Husk Fiber and Sago Flour as Strengthening Materials

Nusyirwan Nusyirwan, Yul Hizhar, Adam Malik

Abstract


The development of environmentally friendly composites from natural fibers is an absolute thing to do to replace non-degradable synthetic composites. Some of the weaknesses of natural fiber composites are low mechanical strength, ease of cracking, no moisture resistance, and high-temperature resistance. One of the things that has been done is to make a combination of synthetic materials as a matrix derived from unsaturated polyester reinforced with natural fibers from crushed rice husk particles and starch from sago flour which is used to reduce the percentage of synthetic materials to be able to form composites that are easily decomposed. From the research, it was found that the strength of crack resistance could be increased with a mixture of polyester reinforced with rice husk fiber and sago flour, obtaining an increase in crack resistance strength until the addition of rice husk with a percentage of 15%. While increasing the RH content above 15%, the crack strength value decreases due to the saturation of the RH molecules in the UP which is no longer bound to the UP molecules. The highest crack strength values occurred for the addition of the percentage of RH and SS to the UP material with the addition of 5% SS, which obtained a cracking force of 550 N while the strength of pure polyester was only 37 N. This shows that RH and SS materials can bond with UP molecules and some molecules of RH and SS can prevent cross-linking of polyester molecules. Meanwhile, the addition of SS up to 10% decreases the fracture force obtained, indicating that not all of the sago starch can bind to the polyester molecules.

Keywords


: pure-polyester, rice-husk, sago-flour, crack-strength

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References


N. Adnan, H. Abral, D. H, and E. Staria, “Identification of Mechanical Strength for Mixture of Thermoset Polyester with Thermoset Vinyl Ester due to Bending Load,” JMPM (Jurnal Mater. dan Proses Manufaktur), vol. 6, no. 1, pp. 19–25, 2022, doi: 10.18196/jmpm.v6i1.14450.

P. K. Naik, N. V. Londe, B. Yogesha, L. Laxmana Naik, and K. V. Pradeep, “Mode i Fracture Characterization of Banana Fibre Reinforced Polymer Composite,” IOP Conf. Ser. Mater. Sci. Eng., vol. 376, no. 1, 2018, doi: 10.1088/1757-899X/376/1/012041.

C. V. Opelt, G. M. Cândido, and M. C. Rezende, “Fractographic study of damage mechanisms in fiber reinforced polymer composites submitted to uniaxial compression,” Eng. Fail. Anal., vol. 92, no. June, pp. 520–527, 2018, doi: 10.1016/j.engfailanal.2018.06.009.

D. Frómeta et al., “Identification of fracture toughness parameters to understand the fracture resistance of advanced high strength sheet steels,” Eng. Fract. Mech., vol. 229, no. February, p. 106949, 2020, doi: 10.1016/j.engfracmech.2020.106949.

A. Mahyudin, S. Arief, H. Abral, Emriadi, M. Muldarisnur, and M. P. Artika, “Mechanical properties and biodegradability of areca nut fiber-reinforced polymer blend composites,” Evergreen, vol. 7, no. 3, pp. 366–372, 2020, doi: 10.5109/4068618.

M. T. Albdiry and B. F. Yousif, “Toughening of brittle polyester with functionalized halloysite nanocomposites,” Compos. Part B Eng., vol. 160, no. October 2018, pp. 94–109, 2019, doi: 10.1016/j.compositesb.2018.10.032.

H. Ardhyananta et al., “Mechanical and Thermal Properties of Unsaturated Polyester/Vinyl Ester Blends Cured at Room Temperature,” IOP Conf. Ser. Mater. Sci. Eng., vol. 202, no. 1, 2017, doi: 10.1088/1757-899X/202/1/012088.

K. Liu, S. He, Y. Qian, Q. An, A. Stein, and C. W. Macosko, “Nanoparticles in Glass Fiber-Reinforced Polyester Composites: Comparing Toughening Effects of Modified Graphene Oxide and Core-Shell Rubber,” Polym. Compos., vol. 40, no. S2, pp. E1512–E1524, 2019, doi: 10.1002/pc.25065.

A. A. Betelie, Y. T. Megera, D. T. Redda, and A. Sinclair, “Experimental investigation of fracture toughness for treated sisal epoxy composite,” AIMS Mater. Sci., vol. 5, no. 1, pp. 93–104, 2018, doi: 10.3934/matersci.2018.1.93.

N. Hiremath, S. Young, H. Ghossein, D. Penumadu, U. Vaidya, and M. Theodore, “Low cost textile-grade carbon-fiber epoxy composites for automotive and wind energy applications,” Compos. Part B Eng., vol. 198, no. May, p. 108156, 2020, doi: 10.1016/j.compositesb.2020.108156.

H. N. Dhakal and S. O. Ismail, Unsaturated polyester resins: Blends, interpenetrating polymer networks, composites, and nanocomposites. Elsevier Inc., 2019. doi: 10.1016/B978-0-12-816129-6.00008-9.

M. Santiam, R. Drainage, and W. Cascades, “The Applicability of Linear Elastic Fracture Mechanics to Compressive Damage of the Carbon Fiber Reinforced Plastic Matrix,” 2019.

Z. Yang, H. Peng, W. Wang, and T. Liu, “Crystallization behavior of poly(ε-caprolactone)/layered double hydroxide nanocomposites,” J. Appl. Polym. Sci., vol. 116, no. 5, pp. 2658–2667, 2010, doi: 10.1002/app.

H. Abral et al., “Improving impact, tensile and thermal properties of thermoset unsaturated polyester via mixing with thermoset vinyl ester and methyl methacrylate,” Polym. Test., vol. 81, no. August 2019, p. 106193, 2020, doi: 10.1016/j.polymertesting.2019.106193.

M. T. Albdiry, B. F. Yousif, and H. Ku, “Fracture toughness and toughening mechanisms of unsaturated polyester-based clay nanocomposites,” 13th Int. Conf. Fract. 2013, ICF 2013, vol. 5, pp. 3446–3455, 2013.

C. Miao et al., “Superior crack initiation and growth characteristics of cellulose nanopapers,” Cellulose, vol. 27, no. 6, pp. 3181–3195, 2020, doi: 10.1007/s10570-020-03015-x.

B. B. Rath and J. J. Vittal, “Mechanical Bending and Modulation of Photoactuation Properties in a One-Dimensional Pb(II) Coordination Polymer,” Chem. Mater., vol. 33, no. 12, pp. 4621–4627, 2021, doi: 10.1021/acs.chemmater.1c01124.

Nusyirwan, H. Abral, M. Hakim, and R. Vadia, “The potential of rising husk fiber/native sago starch reinforced biocomposite to automotive component,” IOP Conf. Ser. Mater. Sci. Eng., vol. 602, no. 1, 2019, doi: 10.1088/1757-899X/602/1/012085.

H. Abral et al., “Nanovoids in fracture surface of unsaturated polyester/vinyl ester blends resulting from disruption of the cross-linking of the polymer chain networks,” IOP Conf. Ser. Mater. Sci. Eng., vol. 1062, no. 1, 2021, doi: 10.1088/1757-899X/1062/1/012051.

and D. H. H. Abral, R. Fajrul, M. Mahardika, “Improving impact, tensile and thermal properties of thermoset unsaturated polyester via mixing with methyl merhacrylate and thermoset vinyl ester,” 2019.

a Standard, “Standard Test Methods for Plane-Strain Fracture Toughness and Strain Energy Release Rate of Plastic Materials,” Annu. B. ASTM Stand., vol. 99, no. Reapproved, pp. 1–9, 1996, doi: 10.1520/D5045-99R07E01.2.

M. Hughes, C. A. S. Hill, and J. R. B. Hague, “The fracture toughness of bast fibre reinforced polyester composites: Part 1 Evaluation and analysis,” J. Mater. Sci., vol. 37, no. 21, pp. 4669–4676, 2002, doi: 10.1023/A:1020621020862




DOI: http://dx.doi.org/10.30811/jpl.v21i5.3375

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