Factorial optimization of the effects of extrusion temperature profile and polymer grade on as‐spun aliphatic–aromatic copolyester fibers. II. Crystallographic order

Younes, Basel; Fotheringham, Alexander

doi:10.1002/app.32906

Cited by 10 publications

(7 citation statements)

References 22 publications

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“…This research with previous results (Younes & Fotheringham, 2011;Younes, Fotheringham, & El-Dessouky, 2009, 2010 will help scientists and technologists obtain the enhanced properties of fibres, such as environmentally friendly, economical and energy-saving fibres, at an optimum final product cost.…”

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confidence: 87%

Factorial optimisation of the effects of extrusion temperature profile and polymer grade on as-spun aliphatic–aromatic co-polyester fibres III: mechanical properties

Younes

Fotheringham

2012

Journal of the Textile Institute

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The effect of extrusion temperature profile in the melt-spinning process of as-spun linear aliphatic-aromatic copolyester (AAC) fibres upon their mechanical properties and process productivity was modelled by using factorial experimental designs. After the viscoelastic and morphology characteristics of the polymer were considered using Differential Scanning Calorimetry and Melt Flow Index (MFI), the rheological data were used to determine the enhanced melt-spinning temperature of the six heating zones in the process. Tensile strength, elongation at break, modulus and fibre productivity (g/min) of the melt-spinning process have been quantitatively assessed as responses to polymer grades and extrusion zone temperature. The optimisation of mechanical properties and productivity helps in understanding and controlling the most desired properties in the produced fibre. It has been noted that the die head temperature (spinning temperature), the polymer grade and their interaction are the most significant factors affecting the mechanical properties. Analysis of the fibre productivity shows that the polymer grade and its interaction with the die head temperature is significant in terms of influencing the output of the melt-spinning process, which could be related to the polymer molecular weight and polymer structure. There is an interaction between polymer grade and feeding zone temperature which is related to the material supply action in the feeding zone. The friction between the screw and the material is affected by heating action, which affects the moisture content and the molten material rheology. By adjusting the extrusion temperature profile and selecting the more applicable spin-able polymer grade through a statistical forecasting model, the combination of the cost related to material grade and processing cost controls the fibre production cost. The fibre made of low MFI grade has better structure and mechanical properties than that made of the higher MFI grade, and the former will be preferred for future work. With previous work related to the effects of extrusion temperature profile on the fibre structure, the present paper will help in developing the production process of biodegradable linear AAC fibres.

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confidence: 87%

Factorial optimisation of the effects of extrusion temperature profile and polymer grade on as-spun aliphatic–aromatic co-polyester fibres III: mechanical properties

Younes

Fotheringham

2012

Journal of the Textile Institute

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“…The overall thermal behaviour of the grades used in this method allows the conclusion that the processing window is quite wide. Therefore, the used polymer (AAC) can be safely extruded from 130 ∘ C. The overall thermal behaviour of the polymer used in this method suggests that the processing temperature range is slightly wide (20-25 ∘ C); the technical aspects could apply to other polymers which will have different processing temperature ranges [16][17][18].…”

Section: Additional Informationmentioning

confidence: 99%

Simple Rheological Analysis Method of Spinnable-Polymer Flow Properties Using MFI Tester

Younes

2015

Indian Journal of Materials Science

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Rheological characterization of polymers explains the flow behaviour and viscoelastic properties and tests fibre-forming ability. The current method investigates the viscoelastic properties and morphology of polymers and finds the rheological data and the right polymer viscosity, which is determining the best processing temperature. The right processing temperature saves the power, the material, and the time needed for production. After calculating polymers viscosity by using MFI tester, the method investigates rheological properties and surface shape at different temperatures and loads. The method could apply to other polymers to find the viscosity-temperature change and to set the best processing temperature.

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“…A specially designed spinneret of 30 holes (0.4 mm diameter, l/d=2) was used. Temperature profile and spinning conditions were selected based on statistical analysis and results of previous studies [38][39][40][41]. The temperature of feeding zone was kept above 100 o C to prevent any moisture from forming.…”

Section: Extrusion Of As-spun Fibre Sample By Melt Spinningmentioning

confidence: 99%

Statistical analysis of the effect of multi-stage hot drawing on the thermal shrinkage and crystallographic order of biodegradable aliphatic-aromatic co-polyester fibres

2011

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Using statistical experimental design, the effects of multi-stage hot drawing process on thermal shrinkage and crystallographic order of linear aliphatic-aromatic co-polyester fibres were statistically analyzed. Thermal shrinkage and fullwidth half-maximum (FWHM) of an X-ray scattering profile of the fibres have been quantitatively assessed, and the direction of increasing or decreasing the significant process parameters has been characterized. It has been found that the number of drawing stages, drawing temperature and relaxing stage ratio affect the shrinkage and crystallographic order together. Plate temperature and the interaction between drawing stages and drawing temperature or drawing ratio have an effect on thermal shrinkage; Spin finish application and relaxing temperature have an effect on crystallographic order. The data analysis has been characterized with regard to the relationship between the studied factors statistically analyzed and the scientific reasons suggested. Factorial statistical analysis simulates the combination of drawing process parameters and the selected as-spun environmentally friendly biodegradable fibre.

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Factorial optimization of the effects of extrusion temperature profile and polymer grade on as‐spun aliphatic–aromatic copolyester fibers. II. Crystallographic order

Cited by 10 publications

References 22 publications

Factorial optimisation of the effects of extrusion temperature profile and polymer grade on as-spun aliphatic–aromatic co-polyester fibres III: mechanical properties

Factorial optimisation of the effects of extrusion temperature profile and polymer grade on as-spun aliphatic–aromatic co-polyester fibres III: mechanical properties

Simple Rheological Analysis Method of Spinnable-Polymer Flow Properties Using MFI Tester

Statistical analysis of the effect of multi-stage hot drawing on the thermal shrinkage and crystallographic order of biodegradable aliphatic-aromatic co-polyester fibres

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