Superstructure and mechanical properties of poly(ethylene terephthalate) fibers zone‐drawn under critical necking tension

Suzuki, Akihiro; Kawada, Toru

doi:10.1002/app.10037

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…Stress‐strain curves of iron oxide nanoparticle/PET nanowebs are shown in Figure 13. The tensile strength of the nanowebs was lower than that of general PET films34 or fibers 35. Absence of post‐processing such as annealing, weak bonding at nanofiber crossovers and the porous structure are responsible for the low tensile strength of nanowebs 36.…”

Section: Resultsmentioning

confidence: 94%

Preparation and characterization of magnetic nanofibers with iron oxide nanoparticles and poly(ethylene terephthalate)

Ahn¹,

Kang²

2012

J of Applied Polymer Sci

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Iron oxide nanoparticle/Poly(ethylene terephthalate) (PET) nanowebs were obtained by electrospinning. To achieve superparamagnetic properties, iron oxide nanoparticles with diameters below 25 nm were used. Diameter distribution of iron oxide nanoparticles was measured by a particle size analyzer. Iron oxide nanoparticles were added into 16 wt % PET solution in the ratio of 5, 10, and 15 wt % to PET. The morphology of iron oxide nanoparticle/PET nanowebs was observed using field emission-scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). The nanofiber diameter increased as increasing iron oxide nanoparticle concentration. The superparamagnetic behavior of iron oxide nanoparticle/PET nanofiber was confirmed using superconducting quantum interference device (SQUID). The degree of crystallinity of iron oxide nanoparticle/PET nanowebs was calculated from a differential scanning calorimeter (DSC) results. The change of flexural rigidity and tensile properties of electrospun iron oxide nanoparticle/PET nanowebs with the external magnetic field were examined ISO 9073-7 testing method, universal testing machine and an appropriate magnet. Also, the elastic modulus of iron oxide nanoparticle/PET nanofiber was measured using nanoindentation. With applying magnetic field, the improvement in mechanical properties of field-responsive magnetic nanofibers and nanowebs was confirmed.

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Section: Resultsmentioning

confidence: 94%

Preparation and characterization of magnetic nanofibers with iron oxide nanoparticles and poly(ethylene terephthalate)

Ahn¹,

Kang²

2012

J of Applied Polymer Sci

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“…We already reported the necking behavior of polymers zone‐drawn under the critical necking tension (σ c ) 11–14. The σ c values for many polymers were measured, and their superstructure and mechanical properties were investigated.…”

Section: Introductionmentioning

confidence: 99%

Changes in superstructure and mechanical properties of poly(ethylene‐2,6‐naphthalate) fibers with critical necking tension

Suzuki

Kawada

Hasegawa

2001

J Polym Sci B Polym Phys

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Poly(ethylene‐2,6‐naphthalate) fibers were zone‐drawn under a critical necking tension (σc) defined as the minimum tension needed to generate a necking at a given drawing temperature (Td). In the zone drawing under σc, the neck was observed from 110 to 160 °C. The superstructure in a neck zone induced at each Td was studied. The σc value decreased exponentially with increasing Td and dropped to a low level at a higher Td. The draw ratio increased rapidly with Td increasing above 90 °C, but the birefringence and degree of crystallinity decreased gradually. To study the molecular orientation in the neck zone, we measured a dichroic ratio (A‖/A⟂) of a CO band at 1256 cm−1 along a drawing direction in the neck zone with a Fourier transform infrared microscope. A‖/A⟂ at Td = 110 °C increased rapidly in the narrow neck zone, and that at Td = 140 °C increased in the edge of the wide neck zone. Wide‐angle X‐ray diffraction patterns of the fibers obtained at Td = 130 °C and lower showed three reflections due to an α form, but those at Td = 140 and 150 °C had reflections due to the α form and a β form. © 2001 John Wiley & Sons, Inc. J Polym Sci Part B: Polym Phys 39: 1629–1637, 2001

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Electrically induced contraction of zone-drawn polypyrrole films

et al. 2005

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Superstructure and mechanical properties of poly(ethylene terephthalate) fibers zone‐drawn under critical necking tension

Cited by 3 publications

References 13 publications

Preparation and characterization of magnetic nanofibers with iron oxide nanoparticles and poly(ethylene terephthalate)

Preparation and characterization of magnetic nanofibers with iron oxide nanoparticles and poly(ethylene terephthalate)

Changes in superstructure and mechanical properties of poly(ethylene‐2,6‐naphthalate) fibers with critical necking tension

Electrically induced contraction of zone-drawn polypyrrole films

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