Cellulose acetate (CA) was used as the polymer film material. Perylene as a fluorescence reagent and glycerol triacetate (GTA) as a plasticizer for CA, respectively,

were selected and mixed for visualizing the absorption of perylene into CA. Under optimized CLSM conditions of an objective lens (dry, 20x) and diode laser (408 nm, 290-330 mu W), a fluorescent penetrant, perylene, in GTA solution was detected in CA casting film within around 9 pin depth of the film in 60 minutes after starting the sorption study. It was also found that the fluorescence intensity of perylene became lower with the film depth. This finding suggested that CLSM could visualize the sorption behavior of perylene as a dynamic diffusion process. Analytical conditions, such as a scanning range along the Z axis (+/- 10 or +/- 30 mu m from an air-contact surface of the CA film) and a scan speed (1 or 30 fps) of CLSM, did not affect the fluorescence intensity Salubrinal of the sorbed perylene. It was concluded that a newly developed analytical methodology using CLSM was sufficient for visualizing

the perylene penetrant across the cross-sectional distribution of the CA film, being capable of monitoring the sorption behavior of compounds in polymer materials without any destruction of a given absorbed film. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 116: 1552-1557, 2010″
“We report on new metastable gamma-FeNi nanoparticles produced by mechanical alloying buy BLZ945 of melt-spun ribbon using a high energy ball mill followed by a solution annealing treatment in the gamma-phase region and water quenching in of the face-centered cubic gamma-phase. www.selleckchem.com/products/poziotinib-hm781-36b.html In the Fe-Ni phase diagram there is a strong compositional dependence of the Curie temperature, T(c),on composition in the gamma-phase. This work studies the stabilization of gamma-phase nanostructures and the compositional tuning of Tc in Fe-Ni alloys which can have important ramifications on the self-regulated heating of magnetic nanoparticles in temperature ranges of interest for applications in polymer

curing and cancer thermotherapies. To date we have achieved Curie temperatures as low as 120 degrees C by this method. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3334198]“
“Modification of low-density polyethylene (LDPE) hyperbranched grafting with a maleic anhydride (MAH) was carried out using corotating twin screw extruder in the presence of benzoyl peroxide. The LDPE/polyamide 6 (PA6) and LDPE-g-MAH/PA6 blends were obtained with a corotating twin screw extruder. The melt viscosity of the grafted LDPE was measured by a capillary rheometer. The grafted copolymer was characterized by Fourier transform infrared spectroscopy and scanning electron microscopy The effects of variations in temperature, PA6 loading, and benzoyl peroxide and MAH concentration were investigated.