Nylon 6-Fasern: Änderung der Struktur bei mittleren und hohen Dehnungsverhältnissen

Prevoršek, D. C.; Harget, P. J.; Sharma, Ram A.; Reimschuessel, A. C.

doi:10.1007/bf01643854

Cited by 6 publications

(14 citation statements)

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“…The meridian two‐point patterns are typical of a one‐dimensional period in the so‐called fibrillar structure of drawn semicrystalline polymers. For nylons, whose crystallinity index generally is lower than that of polyolefins, Prevorsek et al22 proposed a model with microfibrils embedded in an amorphous interfibrillar matrix consisting of more or less oriented chains, including tie molecules between adjacent microfibrils. This model is shown in Figure 7.…”

Section: Resultsmentioning

confidence: 99%

“…The volume fraction of the minority phase in the system that is assumed to be the amorphous component of the microfibrils, θ a , was computed from the γ‐coordinate of the first minimum of the correlation function, which obeys where ϕ c is the crystal volume content in the microfibrils. Then, in the framework of Prevorsek's model,22 the volume fraction of microfibrils in the material, V f , can be computed from the ratio of the overall volume crystallinity of the fibers to the crystal volume fraction within the microfibrils …”

Section: Methodsmentioning

confidence: 99%

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Structure and mechanical behavior of nylon‐6 fibers filled with organic and mineral nanoparticles. I. Microstructure of spun and drawn fibers

Ibanes

David

Boissieu

et al. 2004

J Polym Sci B Polym Phys

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The crystalline structure and fibrillar texture of nylon‐6 fibers filled with nanosized particles were investigated using wide‐angle and small‐angle X‐ray scattering. As‐spun fibers filled with organic nanoparticles consisting of aromatic polyamide‐like hyperbranched molecules with amine‐terminating groups exhibited strong modification of both the molecular orientation and the crystalline structure compared with that of unfilled spun fibers. Montmorillonite‐filled fibers mainly exhibited orientation improvement. The differences are discussed in terms of the rheological and nucleating effects during spinning. Drawing at 140 °C involves structural changes that resulted in the three kinds of fibers having a similar crystalline form and molecular orientation. In parallel, after significant strain‐induced changes, the microfibrillar texture of the various fibers displayed subtle differences at the ultimate stage of drawing. The changes in the fibril long period and fibril radius as a function of draw ratio are discussed in terms of the two sequential deformation processes of microfibril stretching and microfibril slipping. The occurrence of interfibrillar strain‐induced cavitation is discussed in relation to the nature of the interactions between the filler and the nylon‐6 matrix. And, finally, the mechanical properties are discussed in relation to the filler–matrix interaction. © 2004 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 42: 3876–3892, 2004

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Structure and mechanical behavior of nylon‐6 fibers filled with organic and mineral nanoparticles. I. Microstructure of spun and drawn fibers

Ibanes

David

Boissieu

et al. 2004

J Polym Sci B Polym Phys

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“…Although a considerable amount of work has been conducted on the field hot‐drawing process, there is a lack of literature about the use of a thorough statistical approach for optimizing the process and achieving specific targets. The control of the structure of drawn nylon 6 fibers will be more effective if quantitative relationships can be established between the fiber properties and drawing conditions.…”

Section: Introductionmentioning

confidence: 99%

Use of D‐optimal design to model and the analysis of the effect of the draw ratio on some physical properties of hot multistage drawn nylon 6 fibers

Rahbar

Haji

2013

J of Applied Polymer Sci

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In this article, we present an experimental design methodology for studying the effect of the draw ratio on the physical properties of nylon 6 fibers on hot multistage drawing. A response surface methodology involving D-optimal design was used for the modeling and optimization. According to the analysis of variance results, the proposed models could be used to navigate the design space. We found that the responses of the tenacity and initial modulus were very sensitive to the factor of the second-stage draw ratio, and the shrinkage response was governed by the factor of the third-stage draw ratio. The results show a good agreement between the experimental and model predictions with high correlation coefficients. The operation conditions for obtaining the drawn yarn with the highest tenacity and initial modulus and low shrinkage are proposed.

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“…In this paper we will refer to the morphological model of PETP proposed by Prevorsek (10). This model shows the microfibrils (several tens of nm thick) consisting of outer sheaths of extended non-crystalline chains and an inner core of alternating crystalline and noncrystalline regions.…”

Section: Information To Be Obtained From Ir Stress Effectsmentioning

confidence: 99%

Study of stress-induced changes in poly(ethylene terephthalate) through Fourier transform infrared spectroscopy

Sikka

Kausch

1979

Colloid Polymer Sci

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The molecular level changes resulting from an external stress applied onto a highly uniaxially oriented poly(ethylene terephthalate) film has been studied. For this purpose, a new technique -Fourier Transform Infrared Spectroscopy -has been employed. Stressqnduced differences are visible in a number of bands within the IR spectra of stressed PETP films. From the assignments of these IR bands, it is inferred how external stresses applied on the polymer films are actually transmitted to the molecular level. The intermicrofibrillar chains are the first to be stressed followed by stress transmission on the crystalline regions. These stresses are also responsible for stretching the backbone bonds, for transforming gauche conformations (predominantly present in the amorphous regions) of the ethylene glycol linkages to the trans, and for modifying the interchaln interactions.

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Nylon 6-Fasern: Änderung der Struktur bei mittleren und hohen Dehnungsverhältnissen

Cited by 6 publications

References 0 publications

Structure and mechanical behavior of nylon‐6 fibers filled with organic and mineral nanoparticles. I. Microstructure of spun and drawn fibers

Structure and mechanical behavior of nylon‐6 fibers filled with organic and mineral nanoparticles. I. Microstructure of spun and drawn fibers

Use of D‐optimal design to model and the analysis of the effect of the draw ratio on some physical properties of hot multistage drawn nylon 6 fibers

Study of stress-induced changes in poly(ethylene terephthalate) through Fourier transform infrared spectroscopy

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