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Manko, T.A.; Джур, Е.А.; Sanin, F.P.; Ermolaev, I. M.

doi:10.1023/a:1010681805495

Cited by 11 publications

(4 citation statements)

References 2 publications

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“…1 The long-term service in hostile environments is required when used in aviation and space engineering. However, aramid fibers are subject to UV photodegradation with the consequences such as increase in brittleness, loss of brightness, change of color and opacity, formation of surface cracks, etc.…”

Section: Introductionmentioning

confidence: 99%

UV photo‐stabilization of tetrabutyl titanate for aramid fibers via sol–gel surface modification

Ding

2006

J of Applied Polymer Sci

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Tetrabutyl titanate was used as sol-gel precursor of a nanosized TiO 2 coating to improve the photostability of aramid fibers. The nanosized TiO 2 coating was characterized by XRD and XPS. The influence of the TiO 2 coating on photo-stability of aramid fibers was investigated by an accelerated photo-ageing method. The photo-stability of aramid fiber showed obvious improvement after coating. After 156 h of UV exposure, the coated fibers showed less deterioration in mechanical properties with the retained tensile strength and elongation at break greater than 36 and 50% of the original values, respectively, whereas the uncoated fibers degraded completely and became powdery. SEM analysis showed no significant surface morphological change on the coated fiber after the exposure, while some latitudinal crack fractures appeared on the uncoated aramid fiber. The effect of the nanosized TiO 2 coating was also well demonstrated by examining the difference of distributions of C1s in XPS deconvolution analysis on the surface of uncoated/coated fibers with increasing UV exposure time.

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Section: Introductionmentioning

confidence: 99%

UV photo‐stabilization of tetrabutyl titanate for aramid fibers via sol–gel surface modification

Ding

2006

J of Applied Polymer Sci

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“…3.1 GPa for the unoriented material). In a similar study, Manko et al20 investigated the effect of weak magnetic fields on the properties of Kevlar Aramid fiber reinforced epoxy plastics. The greatest effect of hardening was achieved at a magnetic‐field intensity of 9.6 kA/m, at which the ultimate strength increased by 23% and Young's modulus increased by 30%.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of magnetically oriented epoxy

Al-Haik

Garmestani

et al. 2004

J Polym Sci B Polym Phys

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ABSTRACT:The microstructure of an epoxy system oriented in high magnetic fields (15-25 T) has been observed to consist of highly oriented domains at the molecular level along the direction of the applied field. The changes in the microstructure have been characterized as a function of the magnetic-field strength and have been investigated microscopically and with wide-angle X-ray diffraction. The mechanical properties of the epoxy have been examined in light of nanoindentation experiments at different load levels. The basic results of the experimental investigations for the effect of high magnetic fields on the structure and property of the epoxy are presented. Nanoindentation testing has revealed large differences in the nanomechanical behavior for thermomagnetically processed epoxy specimens. The differences can be ascribed to the microstructural changes (reorientation) of the polymer at the molecular level.

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“…Since it came to market in 1972, the availability of aramid fiber has advanced in material science, particularly in the areas of fiber‐reinforced composites, rubber goods, ropes and cables, ballistics, pulp‐reinforced friction products, gaskets, and so forth 1. Structures made of aramid‐fiber‐reinforced (ARF) plastics are widely used in aviation and space engineering due to the low density and high specific strength of aramid fibers and composites based on them, which is important for aircraft industry 2…”

Section: Introductionmentioning

confidence: 99%

Interfacial studies on the surface modified aramid fiber reinforced epoxy composites

Cheng

2006

J of Applied Polymer Sci

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In this work, solutions of rare earth modifier (RES) and epoxy chloropropane (ECP) grafting modification method were used for the surface treatment of aramid fiber. The effect of chemical treatment on aramid fiber has been studied in a composite system. The surface characteristics of aramid fibers were characterized by Fourier transform infrared spectroscopy (FTIR). The interfacial properties of aramid/epoxy composites were investigated by means of the single fiber pull-out tests. The mechanical properties of the aramid/epoxy composites were studied by interlaminar shear strength (ILSS). As a result, it was found that RES surface treatment is superior to ECP grafting treatment in promoting the interfacial adhesion between aramid fiber and epoxy matrix, resulting in the improved mechanical properties of the composites. Meanwhile, the tensile strengths of single fibers were almost not affected by RES treatment. This was probably due to the presence of reactive functional groups on the aramid fiber surface, leading to an increment of interfacial binding force between fibers and matrix in a composite system.

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Untitled

Cited by 11 publications

References 2 publications

UV photo‐stabilization of tetrabutyl titanate for aramid fibers via sol–gel surface modification

UV photo‐stabilization of tetrabutyl titanate for aramid fibers via sol–gel surface modification

Mechanical properties of magnetically oriented epoxy

Interfacial studies on the surface modified aramid fiber reinforced epoxy composites

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