Poly(methyl methacrylate) monolayers at the air–water interface

Çapan, İ.; Çapan, Rıfat; Tanrısever, Taner; Can, S {u}leyman

doi:10.1016/j.matlet.2005.03.026

Cited by 15 publications

(14 citation statements)

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“…The surface pressure versus surface area (∏‐A graph) is an important graph to understand the characteristic surface behavior of a floating monolayer on the water surface. The area per molecule for a floating monolayer can be calculated by using the following relation21: where A is the enclosed area, M w is the molecular weight of the material, c is the concentration of the solution, V is the volume of the solution spread onto the water surface, and N A is the Avogadro number.…”

Section: Theoretical Considerationmentioning

confidence: 99%

Characterization of polymeric LB thin films for sensor applications

Erdoğan

Özbek

Çapan

et al. 2011

J of Applied Polymer Sci

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The Quartz Crystal Microbalance (QCM) system is utilized to investigate the relationship between mass uptake and associated swelling for Langmuir-Blodgett (LB) organic thin films obtained from pyrene endcapped polystyrene (PS). The study was carried out using three different molecular weights of polymeric chains. The changes in resonance frequency associated with mass changes can be attributed to the swelling behavior of polymeric thin films during vapor absorption. This swelling is due to the capturing of organic vapor molecules in the sensor environment. To quantify real-time QCM data for swelling, early-time Fick's law of diffusion was adopted to fit the results, and a good linear relationship was observed between the mass uptake and square root of the swelling time. The diffusion coefficients for swelling were thus obtained from the slopes of the fitting curves and was found to be correlation with the amount of organic vapor content in the cell. It was also observed that diffusion of the organic vapor into higher molecular weight polystyrene thin films are much faster than low molecular weight ones in sensor applications. Diffusion coefficients were found to be 0.2-3.0 Â 10 À16, 5.0-13 Â 10 À16, and 1.0-1.6 Â 10 À15 cm 2 /s for PS1, PS2, and PS3 LB thin films, respectively.

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Section: Theoretical Considerationmentioning

confidence: 99%

Characterization of polymeric LB thin films for sensor applications

Erdoğan

Özbek

Çapan

et al. 2011

J of Applied Polymer Sci

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“…Among the wide range of polymer, PMMA has been proposed for its high number of applications, such as sensors, optical fibers [4], resist for ion lithography [5] and high absorption coefficient to specific wavelength bands. PMMA has stoichiometry (C 5 O 2 H 8 ) n , with an high content in hydrogen, and a density of 1.18 g/cm 3 , with a fusion pint at 160°C.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of porous opaque PMMA foils to be laser irradiated producing ion acceleration

Cutroneo

2018

EPJ Web of Conferences

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Abstract. In this study, the effect of pore size in the opaque poly(methyl methacrylate) and its composition is investigated by optical measurements as well as Rutherford Backscattering Spectroscopy and Elastic Recoil Detection Analyses. The enhancement of the absorption coefficient induced by the presence of micrometric beads makes these porous thin foils high absorbent to IR radiation and suitable to be laser irradiated in order to generate a hot plasma rich in proton emission. The presented results indicate that the high optical transparency of PMMA foils can be strongly reduced by the presence of the micrometric acrylic beads and that the presence of high Z-metallic nanoparticles, such as gold, embedded in the polymer enhances the acceleration of emitted ions. The fabricated advanced targets have been irradiated by lasers at low intensity (Messina University) and at high intensity (PALS Research Infrastructure in Prague) generating plasma accelerating high proton yield and energy.

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“…One polymer presenting these properties is the polymethylmethacrylate (PMMA), which is a transparent thermoplastic polycarbonate, often called acrylic glass. The molecular formula is (C 5 O 2 H 8 ) n , with density 1.18 g/cm 3 , a hydrogen/carbon atomic ratio of 1.6, a melting point of 110 • C. It has peculiar mechanical properties such as high mechanical strength, high Young's modulus and low elongation at break. It is highly scratch resistant and moreover is one of the hardest thermoplastics.…”

Section: Introductionmentioning

confidence: 99%

“…The particles typically have a hydrophilic anionic surface with refractive index of 1.49 at 590 nm wavelength [2]. Transparent PMMA has an electrical resistivity <2 × 10 15 cm, thus it is widely employed as sensor and as optical fibers [3]. The dimensions of the acrylic beads can be controlled by the process of sintering and by the velocity of melted cooling.…”

Section: Introductionmentioning

confidence: 99%