Periodic oscillations during stretching of polyethyleneterephthalate

Kerchek'yan, A.S.; Andrianova, G.P.; Kargin, V.A.

doi:10.1016/0032-3950(70)90416-8

Cited by 14 publications

(9 citation statements)

References 6 publications

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“…Recently its modelling also came to the front [2]. Stress oscillation occurring during the tensile testing of poly(ethylene terephthalate) (PET) -also denoted as self-oscillation -was described first in 1970, in conjunction with necking induced by the static loading of amorphous PET [3]. Stress oscillation means that under certain conditions the stress arising during necking is not constant anymore, but exhibits a periodic fluctuation vs. time [4].…”

Section: Introductionmentioning

confidence: 99%

Modelling tensile force oscillation during the tensile test of PET specimens

Vas¹,

Ronkay²,

Czigány³

2009

Express Polym. Lett.

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Abstract. Force oscillation occurring during the tensile testing of poly(ethylene terephthalate) (PET), resulting in periodical cavitation of the test specimens, has been studied. A mathematical model has been developed to describe the phenomenon, wherein special fibre bundles are assigned to the amorphous molecular chains. In order to model the local periodical transformations and the rate dependent viscoelastic behaviour the coupled fibre bundle cells were supplemented with a twoelement Maxwell model. Using the parameters determined from the measurements the model was compared to the measured force-elongation diagrams and it has been concluded that the simple model can be well used to describe the phenomenon.

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Section: Introductionmentioning

confidence: 99%

Modelling tensile force oscillation during the tensile test of PET specimens

Vas¹,

Ronkay²,

Czigány³

2009

Express Polym. Lett.

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“…The temperature rise for PVC was estimated from the first principles as 59°C, and the problem looked closed. However, for PET temperature rise, ΔT was calculated as 57°C (Toda 1994), while in experiments, substantially higher ΔT = T − T 0 ≈ 100°C was recorded (Kechekyan et al 1970). In addition, heating-induced fracture was observed at high drawing rates (Kechekyan et al 1970).…”

Section: Discussionmentioning

confidence: 95%

“…However, for PET temperature rise, ΔT was calculated as 57°C (Toda 1994), while in experiments, substantially higher ΔT = T − T 0 ≈ 100°C was recorded (Kechekyan et al 1970). In addition, heating-induced fracture was observed at high drawing rates (Kechekyan et al 1970). Melting of PET fibers near a fracture plane was observed (Hearle et al 1998).…”

Section: Discussionmentioning

confidence: 95%

“…A 25°C temperature rise, ΔT, was observed in polycarbonate (PC) in room conditions at a drawing rate V = 307 mm/min (Koenen 1994), and for PET, the temperature T = 84°C was recorded at V = 500 mm/min (Toda et al 2002). For PET, the temperature T = 120°С was reported in room conditions (Kechekyan et al 1970). The thermomechanical fracture of PET was observed at high drawing rates (Kechekyan et al 1970;Hillmansen and Haward 2001;Haward 2003).…”

Section: Introductionmentioning

confidence: 99%

“…For PET, the temperature T = 120°С was reported in room conditions (Kechekyan et al 1970). The thermomechanical fracture of PET was observed at high drawing rates (Kechekyan et al 1970;Hillmansen and Haward 2001;Haward 2003).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Non-adiabatic heating of polymer films under drawing

Баженов

2014

Int J Mech Mater Eng

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A study of the drawing behavior of poly(ethylene terephthalate)

Pereña

Duckett

Ward

1980

J of Applied Polymer Sci

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SynopsisCold-drawn and hot-drawn samples of poly(ethy1ene terephthalate) were studied by means of measurements of shrinkage stress, birefringence, and differential scanning calorimetry (DSC). The values of shrinkage stress were comparable for both types of sample, implying that the deformation of a molecular network is important for both cold drawing and hot drawing. The DSC results indicate that substantial crystallization occurs in hot drawing for other than the lowest draw ratios, and this crystallization gives rise to an additional peak in the shrinkage stress measurements. In addition to temperature, strain rate is also an important variable, and changes in strain rate caused significant changes in both hot-drawn and cold-drawn samples.

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Periodic oscillations during stretching of polyethyleneterephthalate

Cited by 14 publications

References 6 publications

Modelling tensile force oscillation during the tensile test of PET specimens

Modelling tensile force oscillation during the tensile test of PET specimens

Non-adiabatic heating of polymer films under drawing

A study of the drawing behavior of poly(ethylene terephthalate)

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