Abstract
The composite modification is a method of modifying the surface of ultra high molecular weight polyethylene (UHMWPE) fabric through the surface grafting, at the same time the epoxy resin through ultrasonic and 3- amino propyl triethoxy silane (KH550), and then using the vacuum assisted resin transfer molding (VARTM) process to prepare the composite. Explore the improvement of the interface between fiber and resin so as to optimize the mechanical properties of the material. The modification effect, the mechanism of action and the effect of different KH550 contents on the properties of the composite were studied. Compared with the unmodified sample, When 1wt% KH550, the maximum tensile load, tensile strength and the tensile fracture length increased by 13.83%, 20.19% and 51.27%, respectively, and the tensile modulus was reduced by 29.74%. The maximum bending stress and bending modulus of the 1wt% KH550 sample were increased by 104.57% and 190.97%, respectively. The displacement, which is related to the maximum loading, the pressure and the tension area of the resin decreased by 7.81%. The KH550 content had a substantial influence on the thermal decomposition temperature of UHMWPE, and it had a small effect on the epoxy resin. A KH550 content of 1wt% strengthened the bonds between the fibre and the resin, such that the main failure mode of the pressure area was the hickies, and the tension areas contained hickies and cracks.
Highlights
Epoxy resin matrix composites are widely used due to their desirable properties; the materials are designed to be lightweight and have high strength and tensile modulus values
The purpose of the processing to make more surface hydroxyl active group, such as by the fiber surface under Fourier Transform infrared spectroscopy (FTIR) (Fig. 3), SEM image (Fig. 4) and the contact angle text (Fig. 5), radiation grafting grafted on the hydroxyl and other active group successfully, in this case, KH550 can react with hydroxyl, on the other side can connect epoxy resin
The first peaks in the Differential Thermal Gravity (DTG) spectra are sharp, which indicates that the rate of ultra-high molecular weight polyethylene (UHMWPE) fibre decomposition suddenly increased once it reached the decomposition temperature
Summary
Epoxy resin matrix composites are widely used due to their desirable properties; the materials are designed to be lightweight and have high strength and tensile modulus values. Modified epoxy resin by KH550 to improve the tensile properties of warp knitted viscose fabric composites. The tensile strength and elongation at break of the viscose fabric composites prepared from modified resin, increased up to 14 %and 41%, respectively. Findings The irradiated composites showed highest improved of mechanical properties at the 10 kGy γ-radiation dose. The results showed that the curing of the modified mechanical properties and heat resistance were increased, the improvement of heat resistance can be attributed to the higher the crosslinking density of skeleton and hyperbranched polyester rigid aromatic structure. The mechanism, modification effects, and influence of different 3-aminopropyltriethoxysilane (KH550) content on the bending property of UHMWPE/epoxy resin were fully studied via the addition of KH550 to the epoxy resin. We determined the optimum content of KH550 and discussed the relationship between the properties and morphologies of the modified system
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