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

Ibrahim³

et al. 2021

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Recently, scientific research has confirmed that a single polymer material cannot meet the ambitions of all surgical requirements. Thus, combinations of different types of polymeric materials are used in order to manufacture different suture materials. A copolymer of Polyglycolide (PGA) and trimethylene carbonate (TMC) is one of the simplest bioabsorbable monofilament sutures. The optical properties of PGA/TMC copolymer surgical suture were investigated by using multiple‐beam interferometric of Fizeau type. The mechanical properties were measured by a suture‐drawing apparatus attached to the multiple‐beam interferometric system. The refractive indices, stress–strain curve, elastic shear modulus, Young's modulus and crosslink density were investigated for the PGA/TMC surgical suture at various draw ratios. The biological activities were conducted by Quantitative Structure Activity Relationships (QSAR) descriptors. Molecular Electrostatic Potential (MESP) maps were used to describe the reactivity and functional active sites for the given molecule. The behavior of stress–strain curve confirms the compatibility of the suture with the sternum which proves that this suture is a good candidate for cardiac operations. Research highlights Fizeau fringes is accurate in characterizing properties of PGA/TMC surgical suture. The biological activities were conducted by (QSAR) descriptors. The compatibility measurements lead to it is a good candidate for cardiac operations.

Section: Resultsmentioning

confidence: 99%

Characterization of the mechanical and structural properties of PGA/TMC copolymer for cardiac tissue engineering

El-Sayed

Ibrahim³

et al. 2021

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“…Cold drawing process is one of the most common methods for producing change in the physical properties of polymeric fibers. A change in the degree of axial orientation due to stretching is followed by a change of the optical properties which the latter mainly depends on the wavelength of the incident photon energy (Hamza, Sokkar, El‐Bakary, & Swidan, 2020). Many authors (El‐Bakary, 2008; Hamza et al, 2007a; Hamza et al, 2007b; Sokkar, El‐Tonsy, El‐Bakary, El‐Morsy, & Ali, 2009; El‐Bakary, 2007; Hamza, Fouda, Sokkar, & El‐Bakary, 1996; Hamza, Sokkar, El‐Bakary, & Ali, 2003) designed manipulation and automatic drawing devices to be attached with two‐ and multiple‐ beam interferometric systems.…”

Section: Resultsmentioning

confidence: 99%

FECO fringes for investigating the effect of grafting process on the dispersion properties of polyamaide‐6 fibers

Sokkar

Sewidan

et al. 2021

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Polyamide-6 fiber was modified by grafting it with poly(methyl methacrylate) PMMA polymer. The grafting process is widely used in industry to introduce new properties and overcome some obstacles, for instance, in storing energy applications. Multiplebeam interference techniques are very precise techniques to characterize the different properties of polymeric fibers. Fringes of equal chromatic order FECO technique was used to study the effect of grafting process on the dispersion properties of polyamides fibers. A mechanical drawing device was attached to the FECO system to evaluate the mechanical deformation impact on the samples and on their dispersion properties. The dispersion properties were evaluated by measuring their refractive indices, Cauchy's constants, average excitation energy, dispersion energy, lattice energy, interband oscillator wavelength, static dielectric constant, and Abbe's dispersion number. The results show that grafting polyamide-6 with PMMA produced a new material with a different structure and different dispersion properties. Microinterferograms, graphs and tables were given for illustrations.

“…To evaluate the orientation produced due to the mechanical cold drawing process, the intrinsic birefringence should be known. A method is proposed for calculating the intrinsic optical properties such as maximum refractive index and maximum birefringence (Hamza et al, 2020). Using this method, the maximum birefringence (Δn Max )…”

Section: Materials and Optical Systemsmentioning

confidence: 99%

Phase estimation for investigating the optical and mechanical properties of Monocryl suture for soft tissue approximation and ligation

El-Rashidy

Omar

et al. 2022

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Monocryl is a bio-absorbable suture composed of a polyglycolide and polyepsiloncaprolactone copolymer material and is considered a promising candidate for soft tissues approximation. Consequently, the physical, mechanical, and morphological properties are essential for the surgeons to select the suitable suture for their surgical perform. In this article, Mach Zehnder interferometer equipped with a mechanical drawing device are used for evaluating the mechanical properties and a better understanding of how the Monocryl suture reacts to loading. The twodimensional fast Fourier transform is applied to extract the phase from the captured interference microinterferograms at different draw ratios. The extracted phase helps to determine some opto-mechanical and structural properties of Monocryle suture.Quantitative structure-activity relationships model is employed for investigating the biological activity of the tested suture. The stress-strain behavior of Monocryl suture has a J-shaped behavior which compatible with the behavior of the soft tissues. The molecular electrostatic potential maps showed that Monocryl model structure is proved to be electrophilic interplays.