This research aims to prepare a nano composite material of ethylene vinyl acetate (EVAc) copolymer reinforced with both silica and silver (Ag+) nanoparticles different weight percentage ( 0.25, 0.5 & 1) wt.%. Spin coating technique was used for the preparation films SiO2 nanoparticles. Atomic force microscopy (AFM) measure roughness , in addition surface area ratio, valley fluid index bearing i...

We present a study of microphase separation induced by competitive hydrogen bonding in A-b-B/C diblock copolymer/homopolymer complexes where the diblock copolymer A-b-B is immiscible and the homopolymer C can interact unequally with both A and B blocks through hydrogen bonding. A model system containing poly(2-vinyl pyridine)-block-poly(methyl methacrylate) (P2VP-b-PMMA) and poly(4-vinyl phenol...

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The purpose of this study was to assess the behavior of laminated thermoforming materials in an underwater environment to understand the durability of mouthpieces for scuba diving. Two thermoforming materials, polyolefin (PO) and ethylene-vinyl acetate copolymer (EV), were laminated and stored in air, 37 degrees C water, and 37 degrees C water under 0.2-MPa pressure for 1 and 4 weeks . The load...

To improve laser-capture microdissection (LCM) resolution, we designed a near-field probe LCM system that pushed resolution from 7.5 μm to 400 nm. Here, report transfer film for our constructed system, replacing commercial films used in conventional systems. A low-melting-point ethylene vinyl acetate (EVA) copolymer was chosen as the main material. Adequate concentrations of EVA and near-infrar...

Microplastic is an emerging global pollutant that have attracted a great deal of attention from researchers and the public. Guangdong Province has large population relatively well-developed economy, but lacks modern pollution control system. long coastline with varying levels pollution, little research been conducted on microplastics. Therefore, we investigated level microplastic in coastal are...

In the present investigation, an experimental dental arch model fabricated in epoxy was assayed in Kratos universal testing machine to study the mechanical behavior of ethylene and vinyl acetate copolymer (EVA) in the form of mouthguard for sports and flat plate. The following variables were considered: thickness (3 and 4-mm plates), temperature (room and mouth temperature) and presence/absence...

Hydrophobie Vinyl Compound, Enhancement Effect, Enzymatic Hydrolysis, Waste Paper Enzymatic hydrolysis o f waste papers in the presence of various vinyl compounds was carried out, and the addition o f the compounds such as methyl methacrylate, styrene, and vinyl acetate increased glucose yield resulting from the acceleration of the rate of the enzymatic hydrolysis. The optimum conditions existe...

Laser light scattering (LLS) has been used to study an ethylene-vinyl acetate (EVA) random copolymer in 1,2-dichloroethane. The EVA solution was treated using two different thermal processes: (1) quickly quenching from 70 °C to 0 °C; and (2) slowly cooling from 70 °C to room temperature and annealing at room temperature for 24 h before further quenching to 0 °C. The LLS results reveal the forma...