Influence of Bentonite Particles on the Mechanical Properties of Polyester–Sisal Fiber Composites

As a part of the mission to create materials that are more environmentally friendly, we present the following proposal, in which a study of the mechanical properties of composite materials comprising a polyester resin with sisal fiber and bentonite particles was conducted. Sisal fiber was added to a...

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Bibliographic Details
Published in:Polymers 2023-09, Vol.15 (19), p.3963
Main Authors: Valin Rivera, José Luis, Valenzuela Reyes, Cristian Rodolfo, Quinteros Wachtendorff, Arturo Andrés, Rodríguez Soto, Angel, Valin Fernández, Meylí, Iquilio Abarzúa, Roberto, González Ortega, Alvaro, García del Pino, Gilberto, Valenzuela Diaz, Francisco Rolando
Format: Article
Language:English
Subjects:
Bentonite
Composite materials
Electron microscopes
Epoxy resins
Fiber composites
Fibers
Flexural strength
Heterogeneity
Influence
Manufacturers
Mechanical properties
Modulus of elasticity
Modulus of rupture in bending
Polyester resins
Polyesters
Pressure molding
Scanning microscopy
Sisal
Spectrum analysis
Stress relaxation
Stress relaxation tests
Tensile strength
X-ray spectroscopy
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Summary:As a part of the mission to create materials that are more environmentally friendly, we present the following proposal, in which a study of the mechanical properties of composite materials comprising a polyester resin with sisal fiber and bentonite particles was conducted. Sisal fiber was added to a matrix in percentages ranging from 5% to 45% in relation to the polyester resin weight, while bentonite remained fixed at 7% in relation to the polyester resin weight. The specimens were manufactured by compression molding. The mechanical properties were analyzed by tensile, bending, impact, stepped creep, and relaxation tests. In addition, energy-dispersive X-ray spectroscopy and scanning electron microscopy analyses were carried out to analyze the composition and heterogeneity of the structure of the composite material. The results obtained showed that 7% of bentonite added to the matrix affects the tensile strength. Flexural strength increased by up to 21% in the specimens with a 20% addition of sisal fiber, while the elastic modulus increased by up to 43% in the case of a 20% addition of sisal fiber. The viscoelastic behavior was improved, while the relaxation stress was affected.
ISSN:2073-4360
2073-4360
DOI:10.3390/polym15193963