Studies on the static and dynamic properties of different types of polyester industrial yarns

Samui, Barun Kumar; Dasgupta, Sudip; Mukhopadhyay, R.; Ramesh, C.; Chakrabarty, Debabrata

doi:10.1080/00405000.2015.1097087

Cited by 9 publications

(7 citation statements)

References 16 publications

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“…Generally, the structural variation of the industrialized PET is completed in tens of milliseconds because of the fast preforming; it is difficult to obtain intermediate samples and understand the intermediate state of polymer chain in products through the normal method. Although many structural models have been proposed for semicrystalline polymers, − the structure–property evolution mechanism of commercial PET remains unclear.…”

Section: Introductionmentioning

confidence: 99%

Structure–Property Evolution of Poly(ethylene terephthalate) Fibers in Industrialized Process under Complex Coupling of Stress and Temperature Field

Chen

et al. 2018

Macromolecules

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The structure−property evolution of commercial poly(ethylene terephthalate) (PET) fibers obtained from the different drawing and heat-setting stages in industrial processing was systematically investigated. Upon combination of thermal analysis (DSC and DMA) with crystallization and orientation (WAXD and SAXS), the variation of crystallization and microstructures mainly containing lamellar and microfibrillar crystals following the processes were discussed in connection with properties. Results indicate the significant tenacity increase of fiber in the drawing process is mainly attributed to the orientation development of the interlamellar amorphous region, the interfibrillar extension of amorphous molecular chains, and its entanglement with the lamellae. Accordingly, a decline of shrinkage can be seen as a fact of the coiling of amorphous molecular chains, the formation of rigid amorphous fraction, and the increase of crystallinity. Thus, a new four-phase model has been proposed to clarify the structure−property relationships of the commercial PET industrial fibers.

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Section: Introductionmentioning

confidence: 99%

Structure–Property Evolution of Poly(ethylene terephthalate) Fibers in Industrialized Process under Complex Coupling of Stress and Temperature Field

Chen

et al. 2018

Macromolecules

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“…Contrasting to the tenacity of the yarn, a significant change in the percentage of elongation at break was noted with the increase in aging temperature while aging duration was constant, as shown in Figure 6 . Many researchers [ 4 , 5 , 9 , 13 , 14 ] have presented that thermal aging of polyester yarn, above its glass transition temperature and below the melting point, results in the modification of the fiber’s internal structure; this drastically changes the mechanical property of the yarn. As the temperature approaches the melting point of the polyester fiber (260 °C) [ 22 ], the ability of the polymer molecules rearrangement is high, and this phenomenon facilitates the elongation of yarn under a meager applied load.…”

Section: Resultsmentioning

confidence: 99%

“…The study shows that amorphous orientation is the key structural parameter that has an influence on the essential properties of the yarn. Additionally, in another article, Samui et al [ 5 ] studied the relation between the dynamic and static properties of different types of industrial polyester yarns, with their structure and end applications. Martin et al [ 6 ] investigated the effect of the physical aging of semi-crystalline poly(ethylene terephthalate) on the degree of crystallinity.…”

Section: Introductionmentioning

confidence: 99%

Effect of Thermal Aging on the Mechanical Properties of High Tenacity Polyester Yarn

Lemmi

Barburski

Kabziński³

et al. 2021

Materials

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Textile materials produced from a high tenacity industrial polyester fiber are most widely used in the mechanical rubber goods industry to reinforce conveyor belts, tire cords, and hoses. Reinforcement of textile rubber undergoes a vulcanization process to adhere the textile materials with the rubber and to enhance the physio-mechanical properties of the product. The vulcanization process has an influence on the textile material being used as a reinforcement. In this work, the effects of aging temperature and time on the high tenacity polyester yarn’s mechanical and surface structural properties were investigated. An experiment was carried out on a pre-activated high tenacity polyester yarn of different linear densities, by aging the yarn specimens under various aging temperatures of 140, 160, 200, and 220 °C for six, twelve, and thirty-five minutes of aging time. The tensile properties and surface structural change in the yarns pre- and post-aging were studied. The investigation illustrates that aging time and temperature influence the surface structure of the fiber, tenacity, and elongation properties of the yarn. Compared to unaged yarn, an almost five times higher percentage of elongation was obtained for the samples aged at 220 °C for 6 min, while the lowest tenacity was obtained for the sample subjected to aging under 220 °C for 35 min.

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“…High‐modulus low‐shrinkage polyester yarns and high‐tenacity (HT) polyester yarns have high amorphous orientation that is desirable for their technical applications such as in tires and conveyer belts. Low‐shrinkage (LS) and super‐low‐shrinkage (SLS) polyester yarns are suitable for stationary applications because their amorphous orientations are normally less than 0.8 . Using an offline test method to establish the relationship between the structure and tensile proprieties, Liu et al .…”

Section: Introductionmentioning

confidence: 99%

“…Unfortunately, the literature on the creep mechanism of PET industrial yarns is rare. Samui et al . measured the tensile creep deformation of four PET industrial yarns of 1100 dtex under a constant load of 10 N at 20 and 100 °C.…”

Section: Introductionmentioning

confidence: 99%

Creep deformation and its correspondence to the microstructure of different polyester industrial yarns at room temperature

Kang

Liu

et al. 2018

Polymer International

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The room temperature creep behaviors and related microstructural changes of a high‐tenacity (HT) poly(ethylene terephthalate) (PET) industrial yarn and a super‐low‐shrinkage (SLS) PET industrial yarn were investigated and compared by using wide‐angle X‐ray scattering (WAXS), small‐angle X‐ray scattering (SAXS), birefringence measurements and Fourier transform infrared spectroscopy (FTIR) in order to identify their respective underlying creep mechanisms. The crystal structure including crystalline orientation and crystallinity of fibers did not show obvious changes after the creep process, while the amorphous structures varied with creep stress. The HT yarn creep deformation was mainly elastic, and its creep recovery ratio was high. The amorphous orientation, amorphous layer thickness and degree of conformation change from gauche to trans conformers showed a slight increase. The mechanism of this slight change is that the coiled molecular chains are oriented under tensile loading and most of the extended chains are disoriented under offloading in the small amorphous region. By contrast, the SLS yarn underwent plastic creep deformation with a low recovery ratio. After the creep test, the amorphous orientation and lamellar thickness both increased but the crystallinity remained unchanged. The creep mechanism for the SLS yarn is that the molecular chains in the large amorphous domain are easily extended and oriented subjected to tensile loading, while conformation transition from gauche to trans conformers and the formation of irreversible mesophase take place. © 2018 Society of Chemical Industry

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Studies on the static and dynamic properties of different types of polyester industrial yarns

Cited by 9 publications

References 16 publications

Structure–Property Evolution of Poly(ethylene terephthalate) Fibers in Industrialized Process under Complex Coupling of Stress and Temperature Field

Structure–Property Evolution of Poly(ethylene terephthalate) Fibers in Industrialized Process under Complex Coupling of Stress and Temperature Field

Effect of Thermal Aging on the Mechanical Properties of High Tenacity Polyester Yarn

Creep deformation and its correspondence to the microstructure of different polyester industrial yarns at room temperature

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