MODELING OF THE INFLUENCE OF THE THERMOMECHANICAL MODIFICATION PARAMETERS ON THE STRUCTURAL CHANGES IN POLYESTER FIBERS: MODELING OF THE INFLUENCE OF THE THERMOMECHANICAL MODIFICATION PARAMETERS ON THE STRUCTURAL CHANGES IN POLYESTER FIBERS

Valentin  Velev; Valentin  Grozev; Anton  Popov; Rene  Androsch; Todor  Dimov; Lyubomira  Veleva; Hans-Joachim  Radusch

doi:10.46687/jsar.v6i1.154

Authors

Valentin Velev KONSTANTIN PRESLAVSKY UNIVERSITY, 9700, SHUMEN, BULGARIA
Valentin Grozev KONSTANTIN PRESLAVSKY UNIVERSITY, 9700, SHUMEN, BULGARIA
Anton Popov UNIVERSITY "PROF. DR. ASSEN ZLATAROV" – BURGAS, 8000, BURGAS, BULGARIA
Rene Androsch MARTIN LUTHER UNIVERSITY, HALLE-WITTENBERG, CENTER OF ENGINEERING SCIENCES, 06217, MERSEBURG, GERMANY
Todor Dimov KONSTANTIN PRESLAVSKY UNIVERSITY, 9700, SHUMEN, BULGARIA
Lyubomira Veleva PAUL SCHERRER INSTITUTE, NUCLEAR ENERGY AND SAFETY DEPARTMENT, SWITZERLAND
Hans-Joachim Radusch MARTIN LUTHER UNIVERSITY, HALLE-WITTENBERG, CENTER OF ENGINEERING SCIENCES, 06217, MERSEBURG, GERMANY

DOI:

https://doi.org/10.46687/jsar.v6i1.154

Keywords:

poly (ethylene terephthalate), fibers, heat - mechanical treatment, tensile stress, strain-induced crystallization, modeling, differential scanning calorimetry

Abstract

In the present work is proposed an attempt for modeling of the complex influence of the heat mechanical treatment parameters on the structure developments in as-spun polyester fibers. Freshly molded poly(ethylene terephthalate) (PET) filaments with different preliminary orientation were subjected to simultaneously thermal and mechanical treatments. PET yarns were sequentially undergoing to uniaxially strain-stress with values of 40 MPa, 80 MPa, and 120 MPa at three different temperatures in a narrow temperature range from 85⁰C to 95⁰C. Differential scanning calorimetry (DSC) has been used to study the structural rearrangements in the heat-mechanically processed PET fibers. Response equations have been obtained showing the relationship between the parameters of the thermal deformation experiment and the desired degree of crystallinity of the studied PET fibers.

Author Biographies

Valentin Velev, KONSTANTIN PRESLAVSKY UNIVERSITY, 9700, SHUMEN, BULGARIA

KONSTANTIN PRESLAVSKY UNIVERSITY, 9700, SHUMEN, BULGARIA

Valentin Grozev, KONSTANTIN PRESLAVSKY UNIVERSITY, 9700, SHUMEN, BULGARIA

KONSTANTIN PRESLAVSKY UNIVERSITY, 9700, SHUMEN, BULGARIA

Anton Popov, UNIVERSITY "PROF. DR. ASSEN ZLATAROV" – BURGAS, 8000, BURGAS, BULGARIA

UNIVERSITY "PROF. DR. ASSEN ZLATAROV" – BURGAS, 8000, BURGAS, BULGARIA

Rene Androsch, MARTIN LUTHER UNIVERSITY, HALLE-WITTENBERG, CENTER OF ENGINEERING SCIENCES, 06217, MERSEBURG, GERMANY

MARTIN LUTHER UNIVERSITY, HALLE-WITTENBERG, CENTER OF ENGINEERING SCIENCES, 06217, MERSEBURG, GERMANY

Todor Dimov, KONSTANTIN PRESLAVSKY UNIVERSITY, 9700, SHUMEN, BULGARIA

KONSTANTIN PRESLAVSKY UNIVERSITY, 9700, SHUMEN, BULGARIA

Lyubomira Veleva, PAUL SCHERRER INSTITUTE, NUCLEAR ENERGY AND SAFETY DEPARTMENT, SWITZERLAND

PAUL SCHERRER INSTITUTE, NUCLEAR ENERGY AND SAFETY DEPARTMENT, SWITZERLAND

Hans-Joachim Radusch, MARTIN LUTHER UNIVERSITY, HALLE-WITTENBERG, CENTER OF ENGINEERING SCIENCES, 06217, MERSEBURG, GERMANY

MARTIN LUTHER UNIVERSITY, HALLE-WITTENBERG, CENTER OF ENGINEERING SCIENCES, 06217, MERSEBURG, GERMANY

MODELING OF THE INFLUENCE OF THE THERMOMECHANICAL MODIFICATION PARAMETERS ON THE STRUCTURAL CHANGES IN POLYESTER FIBERS