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

José Luis Valin Rivera, Cristian Rodolfo Valenzuela Reyes, Arturo Andrés Quinteros Wachtendorff, Angel Rodríguez Soto, Meylí Valin Fernández, Roberto Iquilio Abarzúa, Alvaro González Ortega, Gilberto García del Pino, Francisco Rolando Valenzuela Diaz

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Article number3963
Issue number19
StatePublished - Oct 2023


  • bentonite
  • mechanical properties
  • polymer composite
  • sisal fiber


Dive into the research topics of 'Influence of Bentonite Particles on the Mechanical Properties of Polyester–Sisal Fiber Composites'. Together they form a unique fingerprint.

Cite this