Influence of glass and sisal fibers on the cure kinetics of unsaturated polyester resin
AUTOR(ES)
Pistor, Vinicius, Soares, Silvia Simone da Silva dos Santos, Ornaghi Júnior, Heitor Luiz, Fiorio, Rudinei, Zattera, Ademir José
FONTE
Materials Research
DATA DE PUBLICAÇÃO
26/06/2012
RESUMO
The effect of grinded glass and sisal fibers (25 vol%) on the cure kinetics of composites of unsaturated polyester resin (UPR) was investigated by differential scanning calorimetry (DSC) and scanning electron microscopy (SEM). The DSC analysis was carried out at four different heating rates (5, 10, 20 and 40 °C/min), and the cure enthalpy and activation energy (Ea) were determined according to the Flynn-Wall-Ozawa (FWO) method. The results showed that increasing heating rates promoted reduced reaction times. The sisal fiber-containing composites exhibit higher activation energy values for the cure process in comparison with the neat polyester resin and the glass fiber composites. This can be due to the presence of polar groups in the sisal components, which physically interact with the polyester resin and retard the cure reaction. Hence, as sisal fiber retarded the cure reaction of the UPR resin, it is suggested that the use of natural fibers in polymer matrix composites can affect the cure kinetics of the polyester resin.
Documentos Relacionados
- Laminated composite based on polyester geotextile fibers and polyurethane resin for coating wood structures
- Influence of aromatic amine hardeners in the cure kinetics of an epoxy resin used in advanced composites
- Influence of Stacking Sequence on the Mechanical and Dynamic Mechanical Properties of Cotton/Glass Fiber Reinforced Polyester Composites
- Influence of Compaction Pressure and Particle Content on Thermal and Mechanical Behavior of Artificial Marbles with Marble Waste and Unsaturated Polyester
- Influence of the Resin Cement Thickness on the Push-Out Bond Strength of Glass Fiber Posts