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Complex influence of the preliminary orientation strain stress and annealing temperature on the structure development of poly (ethylene terephthalate) fibers

V. VELEV1,* , R. ANDROSCH2, T. DIMOV1, A. POPOV3, H.-J. RADUSCH2

Affiliation

  1. Konstantin Preslavsky University - Shumen, Shumen, 9712, Bulgaria
  2. MLU, Halle-Wittenberg, Center of Engineering Sciences, 06217, Merseburg, Germany
  3. University "Prof. Dr. Assen Zlatarov" - Bourgas, Bourgas, 8000, Bulgaria

Abstract

In the present work the structural development of freshly moulded poly (ethylene terephthalate) fibers with different preliminary orientation subjected to simultaneously thermal and mechanical treatments was studied. Uniaxially strainloading experiments are conducted with partially crystalline PET yarns in a narrow temperature range from 800 C to 950 C and strain stress values of 40 MPa, 80 MPa, and 120 MPa. Differential scanning calorimetry and birefringence measurements were used to investigate the effects of the preliminary orientation, annealing temperatures and strain stress on the structure development of the studied samples. There are established relationships between the fibres preorientation, experimental parameters and the structural rearrangements running in the investigated yarns..

Keywords

Poly (ethylene terephthalate) fiber, Strain stress, Heat-mechanical treatment, Structure development.

Submitted at: April 7, 2010
Accepted at: April 26, 2010

Citation

V. VELEV, R. ANDROSCH, T. DIMOV, A. POPOV, H.-J. RADUSCH, Complex influence of the preliminary orientation strain stress and annealing temperature on the structure development of poly (ethylene terephthalate) fibers, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 4, pp. 958-961 (2010)