Comparison between viscous elastic plastic behaviour of the composites reinforced with plain glass fabric and chopped strand mat

Stanciu, Mariana Domnica; Harapu, A; Drăghicescu, Horațiu Teodorescu; Curtu, Ioan; Savin, Adriana

doi:10.1088/1757-899x/147/1/012097

Cited by 1 publication

(1 citation statement)

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“…[1][2][3][4][5] Fiber fabrics, characterized by their bidirectional structure, provide dual support for polymer matrices and exhibit excellent mechanical properties compared to unidirectional fibers. 6 The main focus of fiber-reinforced composites is to achieve good interfacial bonding, as it plays a crucial role in determining the mechanical properties of composite materials. [7][8][9][10] However, most fiber surfaces have fewer surface active functional groups.…”

Section: Introductionmentioning

confidence: 99%

Significant enhancement of mechanical properties for glass fiber fabric‐reinforced polyamide 6 composites by improving interfacial bonding

Fang,

Jia,

Chen

et al. 2024

Polymer Composites

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In fiber‐reinforced composites, the interfacial bonding between fibers and the matrix is crucial for determining the material's performance. A vacuum‐assisted resin transfer molding (VARTM) process was utilized in this work to fabricate glass fiber fabric‐reinforced polyamide 6 (GFF/PA6) composites through in‐situ polymerization using caprolactam (CL) as the precursor. To enhance the fiber‐matrix interfacial bonding, polyethylene glycol (PEG) was incorporated into the polymerization system, improving the hydrogen bonding between the matrix and fibers. Morphological observations and interface layer analysis revealed that the introduction of PEG resulted in improved interfacial bonding and increased interface layer thickness. Molecular dynamics simulations indicated that the amino formate groups formed by the reaction with PEG exhibited more hydrogen bonds with the hydroxyl groups on the glass fiber surface, thereby promoting interfacial bonding between the matrix and fibers. When the PEG content was 10 wt%, the tensile strength and the elongation at break of the corresponding composite increased by 160% and 300% compared to GFF/PA6 composites without PEG. This study presents a promising strategy for enhancing the fiber‐matrix interfacial bonding by modifying the matrix, offering a prospective approach for developing high‐strength thermoplastic composites.Highlights GFF/PA6 composites were fabricated via the VARTM method. The addition of PEG for matrix modification improved the interfacial bonding. The modification enhances the hydrogen bonding between the matrix and fibers. Good interfacial bonding can greatly promote the crystallization of the matrix. The composites exhibited a significant increase in strength and toughness.

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