The physicochemical properties of polymers can be modified by spatial configuration. Here, dielectric spectroscopy (DS) was employed to investigate the effect tacticity on glass-transition dynamics confined polymer films. We have also carried out relaxation studies at ambient and elevated pressure conditions. High-pressure measurements provide information sensitivity density changes, which help...

background: field matching problems in abutting electron fields can be managed by using spoilers. objective: the aim of this study was to design a monte carlo framework for the assessment of spoiler application in abutting electron fields. methods: a siemens primus treatment head was simulated for a 5 mev electron beam using beamnrc and dosxyznrc, egsnrc user codes. validation of beam model was...

The output colour distributions from red, green and blue (RGB) LEDs mixed with cross linked PMMA micro particle doped PMMA mixing rods is compared to output from a plain PMMA mixing rod. Distinctive patterns with clear colour separation result with the undoped rod. These are homogenised by our mixers, resulting in white light. Light output has been photographed, measured and computer simulated ...

Poly(methyl methacrylate) (PMMA) bone cement has been widely used in orthopedic surgeries including total hip/knee replacement, vertebral compression fracture treatment, and defect filling. However, aseptic loosening of the interface between PMMA often leads to failure. Hence, development modified that facilitates growth into is key reducing incidence loosening. In this study, MgAl-layered doub...

This study aims to investigate the influence of graphene nanoplatelet (GNP) concentration on electrochemical and tribological properties GNP-poly(methyl methacrylate) (PMMA) composite coatings. GNP-PMMA coatings were prepared with varying GNP concentrations (0.5, 1.0, 3.0, 5.0 wt %) using drop-casting method onto AA6061 aluminum alloy substrates. Results showed that addition 1.0 % increased ten...

The UV polymerization process dictates the materials that can be employed in the sheath-flow device downstream from the hydrodynamic focusing grooves. The primary requirement for UV polymerization is an integrated window through which the shaped core can be polymerized using a UV source. Possible options include the use of all PDMS parts, top and bottom, or a combination of PDMS and silicon/gla...

In this study, we investigated the incorporation of poly(vinyl alcohol) (PVA) nanofibers within poly(methyl methacrylate) (PMMA) microchannels in order to allow for sample preparation and concentration within microfluidic detection systems. Nanofibers were electrospun onto gold microelectrodes and integrated into polymer microfluidic systems using ultraviolet (UV)-assisted thermal bonding. We d...

The current work focuses on the preparation of magnesium oxide nanoparticles using aqueous chloride salts and sodium hydroxide powder by a simple chemical precipitation method at an annealing temperature 700 °C for 6 hours. structural morphological properties were investigated X-ray diffraction (XRD). Polycrystalline cube Scherer equation showed crystalline size 17.23 nm. EDS analyzes high puri...

PURPOSE To compare primary implantation of foldable hydrophilic acrylic with polymethylmethacrylate (PMMA) intraocular lenses (IOLs) in pediatric cataract surgery in terms of short-term complications and visual outcomes. METHODS This randomized clinical trial included 40 eyes of 31 consecutive pediatric patients aged 1 to 6 years with unilateral or bilateral congenital cataracts undergoing ca...