Study of As-Spun Poly(ethylene terephthalate) Fibers Subjected to Thermal and Mechanical Treatments

Velev, Valentin; Androsch, René; Radusch, Hans‐Joachim; Betchev, Christo

doi:10.1002/1439-2054(20011201)286:12<752::aid-mame752>3.0.co;2-e

Cited by 4 publications

(2 citation statements)

References 4 publications

(8 reference statements)

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“…Simultaneous thermal and mechanical modification (STMM) of the studied PET yarns was performed using device constructed and produced in our laboratory [6]. It involves a vertically located tubular heater, which can be moved to enclose the loop of the studied PETbundle.…”

Section: Thermo-mechanically Modificationmentioning

confidence: 99%

Thermo-Mechanically Modification of Amorphous Polyester Fibres: Іі. Calorimetric Investigations

Velev¹,

Попов²,

Kyurkchiev³

et al. 2013

JSAR

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The present work is devoted to the investigation of the structure developments in as-spun amorphous poly (ethylene terephthalate) (PET) occurred as a result of heat mechanical treatments. The deformation behavior of as-spun amorphous poly (ethylene terephthalate) (PET) yarns subjected to simultaneous thermal and mechanical treatments has been studied. It was found that the applied tensile force simultaneously with the linear heating of the studied PET yarns strongly affects the samples deformation behaviour. Differential scanning calorimetry (DSC) has been used to study the structural rearrangements in the thermo-mechanically processed PET fibers occurred as a result of the treatment structural changes. Have been established dependencies between the parameters of the thermal deformation experiment and occurred in the samples structural changes.

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Section: Thermo-mechanically Modificationmentioning

confidence: 99%

Thermo-Mechanically Modification of Amorphous Polyester Fibres: Іі. Calorimetric Investigations

Velev¹,

Попов²,

Kyurkchiev³

et al. 2013

JSAR

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“…Several experimental aspects of the deformation behavior and super molecular structure rearrangement in PET fibers caused by heat and mechanical treatments have been investigated in the recent years including participation of the authors of this article. Part of the experiments have been carried out in non-isothermal conditions [7,8] while in other of them the structural development of PET fibers are investigated at constant temperatures without application of stress [9] and with application of strain stress [10].…”

Section: Introductionmentioning

confidence: 99%

Birefringence in heat-mechanical modified freshly moulded polyester fibers

Velev¹,

Dimov²,

Popov³

et al. 2010

J. Phys.: Conf. Ser.

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Birefringence in heat-mechanical modified freshly moulded polyester fibers Abstract. The article submits new experimental data concerning to the role of combined thermo-mechanical treatments on the structural development of freshly moulded uncrystallized but crystallizable poly (ethylene terephthalate) (PET) fibers. The object of the present work is PET as a thermoplastic polymer with a large practical application. The report is devoted to the influence of the heat-mechanical modification temperature on the structure rearrangement in uniaxially orientated amorphous PET. The heat-mechanical modification of the investigated yarns and the optical measurements were realized by specialized gears constructed and built in the author's laboratories. The fibers heat-mechanical modification includes samples annealing at constant temperature above their glass transition temperature (T g ) without strain stress. The yarn annealing has been followed from well defined uniaxially strain-loading with values from 0 MPa up to 30 MPa during two minutes. The optical measurements were carried out by an optical system using a polarization microscope and a CCD camera. The obtained experimental data has been analyzed by Mocha-1.2 (Jandel Scientific) software. There are established dependences between the heat-mechanical modification mode and the structural rearrangements running in the studied PET samples.

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Calorimetric studies on stress-induced crystallization of pre-oriented poly(ethylene terephthalate) glasses

Velev

Betchev

2008

Thermochimica Acta

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Study of As-Spun Poly(ethylene terephthalate) Fibers Subjected to Thermal and Mechanical Treatments

Cited by 4 publications

References 4 publications

Thermo-Mechanically Modification of Amorphous Polyester Fibres: Іі. Calorimetric Investigations

Thermo-Mechanically Modification of Amorphous Polyester Fibres: Іі. Calorimetric Investigations

Birefringence in heat-mechanical modified freshly moulded polyester fibers

Calorimetric studies on stress-induced crystallization of pre-oriented poly(ethylene terephthalate) glasses

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