scholarly journals MEG Effects on Hydrolysis of Polyamide 66/Glass Fiber Composites and Mechanical Property Changes

Molecules ◽  
2019 ◽  
Vol 24 (4) ◽  
pp. 755 ◽  
Author(s):  
Jong-Young Lee ◽  
Kwang-Jea Kim
Keyword(s):  
Mechanical Properties ◽  
Glass Fiber ◽  
Fiber Composites ◽  
Gas Chromatography Mass Spectrometry ◽  
Degree Of Hydrolysis ◽  
Polyamide 66 ◽  
Pyrolysis Gas ◽  
Glass Fiber Composites ◽  
Property Changes ◽  
Monoethylene Glycol

Polyamide66 (PA66) hydrolysis affects the mechanical properties of Polyamide66/glass fiber (PA66/GF) composites. We investigated the effects of monoethylene glycol (MEG) on the degree of hydrolysis and mechanical properties of four different commercial PA66/glass fiber composites. Using pyrolysis-gas chromatography/mass spectrometry (py-GC/MS), we identified the byproducts of PA66 composite hydrolysis: carboxylic acid and alkylamine substances. The degree of hydrolysis increased as the immersion time in MEG increased. However, the tensile and flexural properties decreased due to hydrolysis. The tensile strength decreased by 42–45%; however, elongation increased by 23–63%. When PA66 absorbs MEG at 130 °C, the materials molecular chains’ bonding force decreased, resulting in increased elongation.

scholarly journals Mechanical Properties of Abaca–Glass Fiber Composites Fabricated by Vacuum-Assisted Resin Transfer Method

Polymers ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2719
Author(s):  
Marissa A. Paglicawan ◽  
Carlo S. Emolaga ◽  
Johanna Marie B. Sudayon ◽  
Kenneth B. Tria
Keyword(s):  
Mechanical Properties ◽  
Glass Fiber ◽  
Natural Fiber ◽  
Volume Fraction ◽  
Hybrid Composites ◽  
Glass Fibers ◽  
Fiber Composites ◽  
Failure Behavior ◽  
Glass Fiber Composites ◽  
Transfer Method

The application of natural fiber-reinforced composites is gaining interest in the automotive, aerospace, construction, and marine fields due to its advantages of being environmentally friendly and lightweight, having a low cost, and having a lower energy consumption during production. The incorporation of natural fibers with glass fiber hybrid composites may lead to some engineering and industrial applications. In this study, abaca/glass fiber composites were prepared using the vacuum-assisted resin transfer method (VARTM). The effect of different lamination stacking sequences of abaca–glass fibers on the tensile, flexural, and impact properties was evaluated. The morphological failure behavior of the fractured-tensile property was evaluated by 3D X-ray Computed Tomography and Scanning Electron Microscopy (SEM). The results of mechanical properties were mainly dependent on the volume fraction of abaca fibers, glass fibers, and the arrangement of stacking sequences in the laminates. The higher volume fraction of abaca fiber resulted in a decrease in mechanical properties causing fiber fracture, resin cracking, and fiber pullout due to poor bonding between the fibers and the matrix. The addition of glass woven roving in the composites increased the mechanical properties despite the occurrence of severe delamination between the abaca–strand mat glass fiber.

Hybridization effect on the mechanical properties of curaua/glass fiber composites

2013 ◽  
Vol 55 ◽  
pp. 492-497 ◽  
Author(s):  
José Humberto Santos Almeida ◽  
Sandro Campos Amico ◽  
Edson Cocchieri Botelho ◽  
Franco Dani Rico Amado
Keyword(s):  
Mechanical Properties ◽  
Glass Fiber ◽  
Fiber Composites ◽  
Glass Fiber Composites ◽  
Hybridization Effect

Manufacturing Technique and Interfacial Modification of Polypropylene/Short Glass Fiber Composites

2014 ◽  
Vol 910 ◽  
pp. 250-253
Author(s):  
Jia Horng Lin ◽  
Zheng Lan Lin ◽  
Jin Mao Chen ◽  
Ching Wen Lou
Keyword(s):  
Mechanical Properties ◽  
Glass Fiber ◽  
Fiber Composites ◽  
Sem Images ◽  
Glass Fiber Composites ◽  
Single Screw Extruder ◽  
Short Glass Fiber ◽  
Interfacial Modification ◽  
Izod Impact ◽  
Short Glass

Maleic anhydride grafted polypropylene (PP-g-MA) is used as a coupling agent, and the influence of its used amount on the mechanical properties of the polypropylene/short glass fiber (PP/SGF) composites is examined. 1, 2, and 3 wt% of PP-g-MA is separately added to PP/SGF composites that are made at an 80/20 ratio (wt%), made into pellets on a single screw extruder, and then made into test samples on an injection machine. When PP-g-MA increases from 1 wt% to 3 wt%, the tensile strength of the PP/SGF composites increases from 56.22 MPa to 64.85 MPa; likewise, flexural strength increases from 67.29 MPa to 81.24 MPa, and Izod impact strength increases from 197.70 J/m 269.61 J/m. SEM images show that the surface of SGF are encapsulated with a layer of PP matrix, which indicates that PP-g-MA can effectively improve the interfacial adhesion between PP and SGF and thus increase the mechanical properties of the resulting composites.

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