Studies on the effects of ?-radiation on the mechanical properties of Nylon 6?12 fibers

Olivares, M.; López-Valdivia, H.; Vázquez‐Polo, G.; Carrasco, Héctor; Álvarez-Castillo, A.; Oliva, Enrique; Castaño, V. M.

doi:10.1007/bf00342456

Cited by 10 publications

(3 citation statements)

References 12 publications

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“…[11][12][13][14][15][16][17][18][19][20] The property improvement occurs not only in irradiated polymers but also in composites containing such polymers. [11][12][13][14][15][16][17][18][19][20] The property improvement occurs not only in irradiated polymers but also in composites containing such polymers.…”

Section: Introductionmentioning

confidence: 99%

Long-term irradiation effects on gamma-irradiated Nylon 6,12 fibers

et al. 2008

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Long-term effects on Nylon 6,12 crystalline fibers irradiated six years ago have been determined, including chemical structure and morphology, and their relationship with storage time. Results from x-ray diffraction, small-angle x-ray scattering, scanning electron microscopy, and atomic force microscopy are reported for those fibers and for freshly irradiated ones. Some results for non-irradiated samples are included for comparison. Changes in the shape and size of the crystals (crystallinity degree) are found; the crystallite size increases with storage time. Both surface and bulk changes are seen in the morphology. Surface damage increases with storage time. Changes observed can be attributed to irradiation causing chain scission, which, in turn, causes crystal reorganization. The present results reinforce interpretation of earlier results obtained for concretes reinforced with irradiated Nylon fibers.

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Section: Introductionmentioning

confidence: 99%

Long-term irradiation effects on gamma-irradiated Nylon 6,12 fibers

et al. 2008

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“…By contrast, there is great interest in studying the radiation stability of polymers [2], as well as the change in chemical, mechanical and physical properties [3], aiming for future applications [4][5][6][7]. However, relatively few reports have been published on the effect of gamma radiation on nylons: mechanical properties [8], melting point decrease [9,10], degree of crystallinity [11][12][13], surface modification [14,15] and additional polymerization [9]. Moreover, there is controversy about the mechanism followed by the gamma-irradiated polymers.…”

Section: Introductionmentioning

confidence: 88%

Post-irradiation effects on gamma-irradiated nylon 6,12 fibers

Menchaca‐Campos

Martínez-Barrera²,

López-Valdivia

et al. 2013

Journal of Polymer Engineering

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Post-irradiation effects on nylon 6,12 crystalline fibers gamma-irradiated 6 years previously (6YI) were studied, including thermal stability and morphology; their relationship with storage time was also studied. The results of these studies were compared with those obtained for nonirradiated (NI) and namely freshly irradiated (FI) crystalline fibers. The results include analyses like thermogravimetric analysis (TGA), differential thermal analysis (DTA), scanning electron microscopy (SEM) and optical images for (6YI and FI) both kinds of nylon 6,12 fibers. The results showed that the most prominent effect is related to the reaction progress. The chain scission and/or crosslinking mechanisms, as well as the free radicals, allow proceeding with the reaction, and consequently, changes on the properties of the FI samples. The melting point, degree of crystallinity, degradation temperature and morphology prove that additional chemical reactions and surface modifications keep occurring in the fibers long after the irradiation process has ended. With storage time, the surface becomes rougher, the color turns yellowish, the melting point diminishes and the degree of crystallinity increases.

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“…PA6-α form can be transformed from PA6-γ form during drawing process. As shown in Figure 6, the diffraction peaks at 20.3 o and 23.7 o represented PA6-α form are more obvious with the draw ratio increase [23,24]. Crystallinity of antibacterial PA6 fibers was calculated based on XRD curves.…”

Section: Morphology Analysismentioning

confidence: 99%

Preparation and Characterization of Antibacterial Nylon 6 Fiber

Tang

Wang

et al. 2017

MSF

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Due to its excellent mechanical property, dye ability and skin affinity, PA6 has been widely used in apparel, home textiles, military products, etc. However, PA6 fiber is easy to breed bacteria and corroded by bacteria in humid environment. One of development tendency of functional PA6 fiber is to design and develop nylon 6 fiber with excellent antibacterial properties, which is also the research target of this paper. In the present investigation, ZnO antibacterial agent was prepared through sol-gel method, and antibacterial masterbatch was acquired via blending antibacterial agent with PA6 using a twin-screw, then antibacterial PA6 fiber was obtained through melt spinning. The thermal properties, crystallization property of antibacterial PA6 masterbatch were discussed. The effect of drawing ratio on fiber strength, elongation of break, orientation and crystallization was also investigated. The antibacterial properties of antibacterial agent and antibacterial PA6 fiber was analyzed by agar diffusion method. The results of Differential Scanning Calorimetry (DSC) suggests that the antibacterial agent causes the rise of crystallization temperature and crystallization rate. X-Ray Diffraction (XRD) and mechanical testing results reveal that the higher drawing ratio leads to higher orientation and strength of PA6 fiber, lower elongation at break. The addition of antibacterial agent increases the degree of orientation and crystallization, reduces the strength of fiber and tends to form α crystalline in PA6 fiber. Antibacterial tests show that antibacterial PA6 fiber has a good antibacterial performance against Staphylococcus aureus.

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Studies on the effects of ?-radiation on the mechanical properties of Nylon 6?12 fibers

Cited by 10 publications

References 12 publications

Long-term irradiation effects on gamma-irradiated Nylon 6,12 fibers

Long-term irradiation effects on gamma-irradiated Nylon 6,12 fibers

Post-irradiation effects on gamma-irradiated nylon 6,12 fibers

Preparation and Characterization of Antibacterial Nylon 6 Fiber

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