Initial stage of fiber structure development in the continuous drawing of poly(ethylene terephthalate)

The most applicable polymer in different applications is poly(lactic acid) (PLA) due its merits. This polymer attracts great interest as an environmentally friendly bioplastic polymer. The main goal of this work is to enhance the different physical properties of PLA. The melt-spun process was used to produce a continuous multifilament yarns of PLA textile fibers. The mechanical properties (tensile properties) of PLA(D600) filaments were studied. The tensile modulus and the maximum tensile strength were 3 and 0.4 GPa, respectively. The effect of the cold-drawing process on some physical properties, such as the melting temperature, glass transition temperature, crystallinity, birefringence, and orientation factor, were measured. The crystallinity values changed as the draw ratio increased, confirming the reorientations and chain packing. From the obtained results of the different physical properties, it was concluded that the drawing process has a great effect on performance of PLA fibers.

show abstract

“…The final inclination angle ( normal∅) of the fiber chain due to the drawing of the samples can be calculated by using Equation (8) 25 …”

Section: Resultsmentioning

confidence: 99%

An insight into enhancing the physical properties of poly(lactic acid) (D600) fibers

Ali

Amin

2022

Textile Research Journal

View full text Add to dashboard Cite

show abstract

“…Bundles of fibers were set perpendicular to the beam and scattering intensities were recorded at 0.02 o intervals at 3 o /min from 5 to 35 o . Crystal sizes of (hkl) planes were calculated by [10,11]: 1where, D hkl is the crystal size of the (hkl) plane, K the Scherrer constant, λ the wave length, H hkl the half width, and θ the Bragg angle.…”

Section: Wide Angle X-ray Scattering (Waxs)mentioning

confidence: 99%

Effect of Annealing Conditions on Molecular Structure and Physical Properties of Polypropylene Slit-Film Yarns

Seo¹,

Han²,

Oh³

et al. 2013

Textile Science and Engineering

View full text Add to dashboard Cite

The effects of various annealing temperatures and durations on the structure and physical properties of polypropylene (PP) slit-film yarns were investigated. Annealing led to a more developed crystal structure, even when the yarns were drawn before heat treatment. Annealing at 140 o C led to better developed crystal structures than that at 100 o C. Annealing primarily affected the crystalline structure, whereas little change was observed in the molecular orientation of the yarns. The slitfilm yarns annealed at 140 o C showed less than 1% shrinkage. A very low-shrinkage slit-film yarn was obtained on annealing for 10 min at 140 o C or 20 min at 100 o C.

show abstract

“…It was reported that 60% of the world polyester production in 2010 was consumed in the form of fibres [1]. Various methods have been investigated by previous researchers, involving spinning, drawing, and annealing processes [1][2][3][4][5][6][7][8]. These methods, including vibrating hot drawing, zone-drawing, cold-drawing, horizontal isothermal bath, draw by using high pressure CO 2 , and high speed in-line drawing, are quite different from each other; however, the fundamentals are the same.…”

Section: Introductionmentioning

confidence: 99%

Preparation of High Modulus Poly(Ethylene Terephthalate): Influence of Molecular Weight, Extrusion, and Drawing Parameters

Zhang¹,

Hua²,

Reynolds³

et al. 2017

International Journal of Polymer Science

View full text Add to dashboard Cite

Poly(ethylene terephthalate) (PET) which is one of the most commercially important polymers, has for many years been an interesting candidate for the production of high performance fibres and tapes. In current study, we focus on investigating the effects of the various processing variables on the mechanical properties of PET produced by a distinctive process of melt spinning and uniaxial two-stage solid-state drawing (SSD). These processing variables include screw rotation speed during extrusion, fibre take-up speed, molecular weight, draw-ratio, and drawing temperature. As-spun PET production using a single-screw extrusion process was first optimized to induce an optimal polymer microstructure for subsequent drawing processes. It was found that less crystallization which occurred during this process would lead to better drawability, higher draw-ratio, and mechanical properties in the subsequent SSD process. Then the effect of drawing temperature (DT) in uniaxial two-stage SSD process was studied to understand how DT (<Tg or close to Tg or close to Trec) would affect the crystallization, draw-ratio, and final mechanical properties of PET. The designed process in current work is simulated to an industrial production process for PET fibres; therefore, results and analysis in this paper have significant importance for industrial production.

show abstract

Initial stage of fiber structure development in the continuous drawing of poly(ethylene terephthalate)

Cited by 3 publications

References 14 publications

An insight into enhancing the physical properties of poly(lactic acid) (D600) fibers

An insight into enhancing the physical properties of poly(lactic acid) (D600) fibers

Effect of Annealing Conditions on Molecular Structure and Physical Properties of Polypropylene Slit-Film Yarns

Preparation of High Modulus Poly(Ethylene Terephthalate): Influence of Molecular Weight, Extrusion, and Drawing Parameters

Contact Info

Product

Resources

About