scholarly journals Dynamic Mechanical Analysis of Thermally Aged Fique Fabric-Reinforced Epoxy Composites

Polymers ◽  
2021 ◽  
Vol 13 (22) ◽  
pp. 4037
Author(s):  
Michelle Souza Oliveira ◽  
Fernanda Santos da Luz ◽  
Fabio da Costa Garcia Filho ◽  
Artur Camposo Pereira ◽  
Vinícius de Oliveira Aguiar ◽  
...  
Keyword(s):  
Dynamic Mechanical Analysis ◽  
Thermal Aging ◽  
Natural Fiber ◽  
Epoxy Composite ◽  
Structural Characteristics ◽  
Natural Fibers ◽  
Mechanical Analysis ◽  
Distribution Functions ◽  
Dynamic Mechanical ◽  
Thermal Degradation Behavior

Dynamic mechanical analysis (DMA) is one of the most common methods employed to study a material’s viscoelastic properties. The effect of thermal aging on plain epoxy and a fique fabric-reinforced epoxy composite was investigated by comparing the mass loss, morphologies, and DMA properties of aged and unaged samples. In fact, thermal aging presents a big challenge for the high-temperature applications of natural fiber composites. In this work, both plain epoxy and fique fabric-reinforced epoxy composite were found to have different molecular mobility. This leads to distinct transition regions, with different changes in intensity caused by external loadings from time-aging. Three exponentially modified Gauss distribution functions (EMGs) were applied to loss factor curves of fique fabric-reinforced epoxy composite and plain epoxy, which allowed identifying three possible mobility ranges. From these results it was proposed that the thermal degradation behavior of natural fibers, especially fique fiber and their composites, might be assessed, based on their structural characteristics and mechanical properties.

Electrical and dynamic mechanical analysis of sisal fibril reinforced epoxy composite

2018 ◽  
Vol 25 (5) ◽  
pp. 2020-2028 ◽  
Author(s):  
Subhash Nimanpure ◽  
S. A. R. Hashmi ◽  
Rajnish Kumar ◽  
Archana Nigrawal ◽  
Ajay Naik
Keyword(s):  
Dynamic Mechanical Analysis ◽  
Epoxy Composite ◽  
Mechanical Analysis ◽  
Dynamic Mechanical

Mechanical and morphological characterization of basalt/Cissus quadrangularis hybrid fiber reinforced polylactic acid composites

2020 ◽  
Vol 234 (14) ◽  
pp. 2895-2907 ◽  
Author(s):  
A Arul Jeya Kumar ◽  
M Prakash
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Water Absorption ◽  
Dynamic Mechanical Analysis ◽  
Fourier Transform Infrared Spectroscopy ◽  
Polylactic Acid ◽  
Natural Fibers ◽  
Mechanical Analysis ◽  
Dynamic Mechanical ◽  
Cissus Quadrangularis

In today's scenario, most of the research works are carried out on the replacement of synthetic fibers using eco-friendly materials called natural fibers. Although there are many research findings in connection with natural fibers, in this work, a new combination of natural fiber having high biomedical potential is reinforced in the polymer composite. Three different weight fractions of polylactic acid, basalt, and Cissus quadrangularis fibers were melt mixed using twin-screw extruder named as PBCQ 1, PBCQ 2, and PBCQ 3. The mechanical, physical, and thermomechanical properties were studied by testing tensile, flexural, impact, hardness, water absorption, Fourier-transform infrared spectroscopy, and dynamic mechanical analysis of the injection-molded biomedical composite specimens prepared as per ASTM standards. It was noticed that the PBCQ 2 composite has the maximum elongation strength, bending strength, shear strength, and shore D hardness compared to other composites taken in this study. Water absorption of PBCQ 1 and PBCQ 2 composites are relatively less than PBCQ 3. The scanning electron microscopy micrograph of PBCQ composites shows tight bonding between the matrix and fibers. The adhesion of matrix and fibers was confirmed by Fourier-transform infrared spectroscopy graph, which indicates the stretching of molecular structure for the occurrence of O–H, C=O, and C–H links. The dynamic mechanical analysis curve of the PBCQ 2 composite indicates high storage modulus and less loss modulus compared to PBCQ 1 and PBCQ 3 due to the low weight percentage of basalt fiber in these composites.

Sign in / Sign up

Export Citation Format

Share Document