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Textile Research Journal
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Poly(ethylene Terephthalate)/Poly(alkylene Terephthalate) Copolyester Fibers: Mechanical and Physical Properties

D.S. Varma

Indian Institute of Technology, Delhi, Hauz Khas, New Delhi 110016, India

Radha Agarwal

Indian Institute of Technology, Delhi, Hauz Khas, New Delhi 110016, India

I.K. Varma

Indian Institute of Technology, Delhi, Hauz Khas, New Delhi 110016, India

Copolyesters were prepared by melt condensation of poly(ethylene terephthalate) (PET) with poly(hexamethylene terephthalate), poly(octamethylene terephthalate), and poly(decamethylene terephthalate). These polymers were characterized by 13C- NMR and intrinsic viscosity measurements. The PET and the copolyesters were spun into fibers using the conventional melt spinning technique. The fibers were drawn to ratios of 3, 4, and 5. Decreases in Tg, Tc, Tm, density, birefringence, crystallinity, and orientation were observed in the copolyester fibers, with an increase in the number of methylene groups in the PET backbone.

Textile Research Journal, Vol. 56, No. 6, 364-369 (1986)
DOI: 10.1177/004051758605600604
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