A combined theoretical and experimental investigation of the valorization of mechanical and thermal properties of the fly ash-reinforced polypropylene hybrid composites

The investigation and design of new polymeric materials with an astonishing combination of properties are nowadays of great importance to facilitate the manufacturing process of high-quality products intended to be utilized in different applications and technical fields. For this intent, novel high-performance blend composites composed of the cyanate ester/benzoxazine resin blend reinforced by different proportions of silane-surface modified Kevlar and glass fibers were successfully fabricated by a compression molding technique and characterized by different experimental tests. The mechanical test results revealed that the bending and impact strength properties were considerably improved when increasing the amount of the hybrid fibers. The studied materials also presented excellent thermal stabilities as compared to the unfilled blend’s properties. With respect to the properties of the reinforcing systems, these improvements seen in either the mechanical or thermal properties could be due to the good dispersion as well as excellent adhesion of the reinforcing fibers inside the resin matrix, which were further evidenced by the Fourier transform infrared spectroscopy and scanning electron microscopy results. Consequently, the improved mechanical and thermal properties promote the use of the fabricated hybrid composites in domestic and industrial applications requiring functional materials with advanced properties for aerospace and military applications.

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Improvement of mechanical and thermal properties of hybrid composites through addition of halloysite nanoclay for light weight structural applications

Journal of Industrial Textiles ◽

10.1177/1528083720936624 ◽

2020 ◽

pp. 152808372093662

Author(s):

K C Nagaraja ◽

S Rajanna ◽

G S Prakash ◽

G Rajeshkumar

Keyword(s):

Thermal Properties ◽

Composite Laminates ◽

Morphological Analysis ◽

Hybrid Composites ◽

Mechanical And Thermal Properties ◽

Light Weight ◽

Building Structures ◽

Suitable Alternative ◽

Structural Applications ◽

Infusion Technique

In this work the effect of stacking sequence of Carbon (C)/Glass (G) fibers and halloysites addition (1, 3 and 5 wt.%) on the mechanical and thermal properties of the hybrid composites were explored. The composite laminates were prepared by using Vacuum Assisted Resin Infusion Technique (VARIT). The outcomes disclosed that the hybrid composites having sequence of C2G3C2 (2-Carbon/3-Glass/2-Carbon layers) showed better overall properties. Moreover, the addition of halloysites enhanced the mechanical and thermal properties of the C2G3C2 hybrid composites. In particular, the hybrid composites added with 3 wt.% of halloysites showed higher overall properties among the other hybrid composites investigated. Finally, the morphological analysis was performed on the fractured surface of mechanical tested composites to study the failure mechanisms occurred. Based on the obtained results it can be concluded that the C2G3C2 hybrid composites added with 3 wt.% of halloysite could be a suitable alternative light weight material for automobile, aerospace and building structures.

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Mechanical and Thermal Characterization of Natural Intralaminar Hybrid Composites Based on Sisal

Polymers ◽

10.3390/polym12040866 ◽

2020 ◽

Vol 12 (4) ◽

pp. 866 ◽

Cited By ~ 4

Author(s):

Alexandre L. Pereira ◽

Mariana D. Banea ◽

Jorge S.S. Neto ◽

Daniel K.K. Cavalcanti

Keyword(s):

Thermal Properties ◽

Natural Fiber ◽

Hybrid Composites ◽

Thermal Characterization ◽

Mechanical And Thermal Properties ◽

Scanning Calorimetry ◽

Sem Images ◽

The Matrix ◽

American Society ◽

Curaua Fibers

The main objective of this work was to investigate the effect of hybridization on the mechanical and thermal properties of intralaminar natural fiber-reinforced hybrid composites based on sisal. Ramie, sisal and curauá fibers were selected as natural fiber reinforcements for the epoxy matrix based composites, which were produced by the hand lay-up technique. Tensile, flexural and impact tests were carried out according to American society for testing and materials (ASTM) standards to characterize the hybrid composites, while differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) were used to evaluate the thermal properties. It was found that the mechanical properties are improved by hybridization of sisal based composites. The thermal analysis showed that the hybridization did not significantly affect the thermal stability of the composites. A scanning electron microscopy (SEM) was used to examine the fracture surface of the tested specimens. The SEM images showed a brittle fracture of the matrix and fiber breakage near the matrix.

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