Structure characterization of cold drawn high density polyethylene thin film

Fouda, I. M.; El‐Tonsy, M. M.; Seisa, E. A.; Felfel, Reda M.

doi:10.1002/app.34123

Cited by 3 publications

(3 citation statements)

References 17 publications

(18 reference statements)

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“…As an impact of the cold drawing process, the fiber chains tend to be more oriented. The crystalline phase orientation f c can be detected from the stress-induced crystallization theoretical model using the following Equation (Fouda et al, 2011):…”

Section: Resultsmentioning

confidence: 99%

“…As an impact of the cold drawing process, the fiber chains tend to be more oriented. The crystalline phase orientation f c can be detected from the stress‐induced crystallization theoretical model using the following Equation (Fouda et al, 2011):

f_{c} = \frac{1}{2} (\frac{3 {normalD}^{3}}{2 + {normalD}^{3}} - 1)

where D is the draw ratio. Figure 9 shows the calculated the crystalline phase orientation f c with the draw ratio.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Enhancing the physical and structural properties of poly(glycolide‐co‐trimethylene carbonate‐co‐ε‐caprolactone) copolymer fibers

Ali

Amin

2022

Microscopy Res & Technique

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Nowadays, due to the methodological needs in the application of internal surgery new methods evolving novel design for surgical suture are recommended. In this work, the effect of cold drawing process and the thermal annealing process on the different optical and structural properties of surgical suture fibers were studied. For the thermal annealing process, samples of Monosyn monofilaments suture fibers were thermally annealed at temperatures ranging from 50 to 100°C for annealing time = 120 min. The thermal treatment was carried out under free end condition. For the cold drawing process, an Instron was used to mechanically draw and measures the tensile stress strain curve of Monosyn samples. Using differential scanning calorimetry, X‐ray diffraction techniques, and optical polarizing microscope the different properties of the tested sutures, such as the crystallinity, sample radius, birefringence, molecular orientation, and tensile properties were measured. From the resulting data, there was a marked increase in the physical and structural properties during the thermal annealing and cold drawing processes. This means that a new reorientation of Monosyn suture molecular chains were performed and approved by calculating the different orientations f(θ) and fc. This is an important improvement for these biodegradable materials to widen their medical use and improve their clinical results. Research Highlights The stress–strain curve for Monosyn surgical fiber is J shape and identical to the human tissue stress‐stain curve. The different orientation calculated improve that the drawing process affect directly on the fiber chain orientations. The fiber chains orientation due to the cold drawing process causes strain induced crystallinity.

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Section: Resultsmentioning

confidence: 99%

f_{c} = \frac{1}{2} (\frac{3 {normalD}^{3}}{2 + {normalD}^{3}} - 1)

where D is the draw ratio. Figure 9 shows the calculated the crystalline phase orientation f c with the draw ratio.…”

Section: Resultsmentioning

confidence: 99%

Enhancing the physical and structural properties of poly(glycolide‐co‐trimethylene carbonate‐co‐ε‐caprolactone) copolymer fibers

Ali

Amin

2022

Microscopy Res & Technique

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“…n ∆ is the current double refraction, and max n ∆ is the maximum double refraction and is given by 0.045 [17]. The birefringence n ∆ can be measured using the calculated refractive indices using the following equation [13].…”

Section: Determination Of the Number Of Chains Per Unit Volumementioning

confidence: 99%

Some Structural Properties of Dynamically Drawn iPP Fibers

Ali¹

2017

OPJ

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Changes in the different structural parameters of iPP fibers during the dynamically cold drawing process were characterized. Using the dynamic mechanical cold drawing device attached to Fizeau interference system all the optical and structural properties can be measured. With the aid of this device the effect of the strain rate on the different structure properties was measured. The molecular orientations, molecular polarizability, molar reflectivity and shrinkage stress were measured. Reorientation of the molecules led to a significant variations in the measured structure properties of the drawn iPP fibers during applying the external tension.

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Optomechanical investigating the impact of grafting polyamide‐6 fibers with PMMA on its intrinsic optical properties

Hamza

Sokkar

El‐Bakary

et al. 2020

Polymer Engineering & Sci

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An optomechanical characterization was carried out to investigate the influence of grafting polyamide‐6 fibers with poly (methyl methacrylate) (PMMA) on their structural relationship properties. Intrinsic optical properties of the modified sample were determined using a method based on the cold drawing process. The Mach‐Zehnder interferometer attached with mechanical drawing device was used to determine the refractive indices and birefringence of the polyamide‐6 samples at different draw ratios. A graphical method was used to determine the intrinsic birefringence of modified polyamide‐6 with PMMA and it was found to be 0.0673 which is less than pure polyamide‐6. The resulting data was used to estimate some structural parameters such as the orientation function, optical orientation angle and structural constant. The drawing effect is more significant on the modified sample than on the pure sample. It was found that the grafting process produced a material with new properties that can be used in different applications.

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Structure characterization of cold drawn high density polyethylene thin film

Cited by 3 publications

References 17 publications

Enhancing the physical and structural properties of poly(glycolide‐co‐trimethylene carbonate‐co‐ε‐caprolactone) copolymer fibers

Enhancing the physical and structural properties of poly(glycolide‐co‐trimethylene carbonate‐co‐ε‐caprolactone) copolymer fibers

Some Structural Properties of Dynamically Drawn iPP Fibers

Optomechanical investigating the impact of grafting polyamide‐6 fibers with PMMA on its intrinsic optical properties

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