The influence of low‐ and high‐linear energy transfers on some physical properties of poly(methyl‐methacrylate) samples

Eissa, M. F.; Kaid, Maysa A.; Kamel, N.A.

doi:10.1002/app.36695

Cited by 12 publications

(4 citation statements)

References 33 publications

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“…The length of the diagonal of the square is measured through a microscope fitted with an ocular micrometer that contains movable knife-edge. The Vickers hardness number is calculated by the formula [13][14][15]:…”

Section: 3-mechanical Techniquesmentioning

confidence: 99%

Determination of the Activation Energy for Formation and Migration of Thermal Vacancies in 2024 Aircraft Material Using Different Techniques and Methods

Kamel

2013

DDF

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Positron annihilation lifetime (PAL) , electrical and mechanical techniques have been used to study the thermal vacancies in one of the most important engineering aluminum alloys which is 2024 alloy. Quenching experiments were usually performed on thin specimens to ensure a uniform quenching rate throughout the specimen. The specimens were prepared with dimensions of 0.15 × 1.5 × 1.5cm3. After grinding, polishing and etching, samples of 2024 were homogenized for 12 h at 673 K and annealed for 90-min., before quenched in water (277 K) and then subject to positron lifetime, electrical and mechanical for measurements. From such measurements it is possible to deduce the vacancy formation enthalpy, which in combination with the results of self-diffusion measurements, give a value for migration enthalpy of the vacancy. These are very important quantities in the study of the annealing of irradiation induced defects.

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Section: 3-mechanical Techniquesmentioning

confidence: 99%

Determination of the Activation Energy for Formation and Migration of Thermal Vacancies in 2024 Aircraft Material Using Different Techniques and Methods

Kamel

2013

DDF

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Section: -Mechanical Techniquesmentioning

confidence: 99%

A Study of the Effect of Natural Aging on Some Plastically Deformed Aluminum Alloys Using Two Different Techniques

Kamel

2013

DDF

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Electrical and mechanical techniques have been performed in order to study the effect of natural aging for up to more than 650 days on wrought (2024, 7075) and cast (AlSi11.35Mg0.23, AlSi10.9Mg0.17Sr0.06) aluminum alloys, after having been deformed at room temperature to 25% deformation. The results revealed that, unlike dislocations, point defects were removed from the samples under investigation except for 7075 alloy and this can be attributed to no point defect introduced in this particular sample during the deformation.

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“…Polyvinyl alcohol (PVA) is a synthetic polymer that is odorless, translucent, tasteless, or a cream-colored granular powder [6]. PVA has good properties that distinguish it from other polymers, such as strength, corrosion resistance, and good thermal stability [7]. It contains a carbon chain backbone fastened to methane carbons with hydroxyl functionalities, which is considered the source of hydrogen bonding that helps to form polymer mixtures [8,9].…”

Section: Introductionmentioning

confidence: 99%

Effect of Loading Corn Starch Nanoparticles on the Morphological, Optical, and Dielectric Behaviors of PVA/PMMA/PAAm Polymer Blend for Optoelectronic and Antibacterial Applications

Kadim,

Abass,

Abdali

et al. 2024

Nano Biomedicine and Engineering

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The present study was conducted to explore the impact of corn starch nanoparticles (CSNPs) on the morphological, optical, and dielectric behaviors of the PVA/PMMA/PAAm (PPP) hybrid polymer matrix. The resultant PPP-CS nanocomposite films were synthesized employing the solvent casting procedure. Scanning electron microscope(SEM) images of the as-synthesized films revealed the successful embedding, homogeneity, and fine dispersion of CSNPs within the host PPP. No changes in the infrared ray(IR) band positions were seen upon embedding. The absorbance-λ chart illustrated an absorption band at 220 nm with red-shift toward higher wavelengths, which points out the semi crystalline structure of PPP-CS films. The optical coefficients were improved upon inclusion of CSNPs. The optical bandgap energy reduces from 4.50 to 4.12 eV as CSNPs' weight percentage increases from 0 wt% to 4 wt%. Furthermore, the refractive index values for PPP-CS films are in the range of 0.5 and 2.5. The dielectric constants of the obtained films decreased with the increase in CSNPs, except for the conductivity. The embedding of a small amount of CSNPs into the hydrophilic matrix significantly improved the composite's bioactivity. The inhibition zone diameters of Staphylococcus aureus bacteria were calculated to be 0, 26, and 32 mm for 0 wt%, 2 wt%, and 4 wt% CSNPs, respectively. The findings of this study are significant for the development of novel nanocomposite materials with antibacterial activity for optoelectronic device applications.

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The influence of low‐ and high‐linear energy transfers on some physical properties of poly(methyl‐methacrylate) samples

Cited by 12 publications

References 33 publications

Determination of the Activation Energy for Formation and Migration of Thermal Vacancies in 2024 Aircraft Material Using Different Techniques and Methods

Determination of the Activation Energy for Formation and Migration of Thermal Vacancies in 2024 Aircraft Material Using Different Techniques and Methods

A Study of the Effect of Natural Aging on Some Plastically Deformed Aluminum Alloys Using Two Different Techniques

Effect of Loading Corn Starch Nanoparticles on the Morphological, Optical, and Dielectric Behaviors of PVA/PMMA/PAAm Polymer Blend for Optoelectronic and Antibacterial Applications

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