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The aim of this in vitro study was to investigate the water sorption and flexural properties of fiber reinforced composites (FRC) prepared from telechelic macromer extended urethane dimethacrylate (PEG-400-E-UEDMA)(PEG), hydroxypropyl methacrylate (HPMA) and E-glass fibers. Three experimental groups of test specimens based on poly(PEG-400-E-UEDMA-HPMA) polymer matrices and continuous unidirectional...
The removal of impurities from metallurgical grade silicon using the O2 and H2O-O2 gas blowing techniques was firstly studied by thermodynamics. The relationships between the boron content in refined silicon and the equilibrium partial pressures of gaseous boride species were established, which shows a theoretical limitation for boron removal from metallurgical grade silicon using the H2O-O2 gas blowing...
Superhydrophobic functional surfaces have numerous applications. Their self-cleaning ability and the associated savings in energy, water and cleaning agents enhance the sustainability of products and often make active cleaning of these surfaces unnecessary. Silicone surfaces, which aim to imitate the surface of the lotus plant, were prepared using a microstructured injection mold. The conical micro...
This paper presents a review of the reported research investigations that are related to the solid particle erosion behavior of polymers and polymeric composites. Attention is paid to the effects of test parameters such as erodent type, size of the erodent, impingement angle, impact velocity and stand of distance. On the erosion wear rate of polymer composites. Various predictions and models proposed...
If all the stars were to align, and if innovations yet to be thought of were implemented, how much more do you think that you and your team as a whole could realistically create in annual sales revenue and profits? I believe and have experienced that the vast majority of companies have the potential to dramatically accelerate growth. With aggressive innovation and effective strategy, three-year objectives...
Herein we report a “One-Pot” synthetic route for preparing 1,1,5,5-tetramethyl-3,3,7,7-tetraphenyl cyclo-tetrasiloxane and strictly alternating poly(dimethylsiloxane-alt-diphenylsiloxane) copolymers by heterofunctional poly-condenzation of diphenylsilanediol with dichlorodimethylsilane in the presence of two different amines, triethylamine and diethylamine, respectively. The products have been characterized...
Silicon nanocrystals were produced using a two-stage gold ion implantation technique. The first stage implantation using low energy ions led to the formation of an amorphous Si (a-Si) layer. A subsequent high energy Au irradiation in the second stage was found to produce strained Si NCs. An annealing step at a temperature as low as 500 °C was seen to result in strain free NCs. Higher temperature annealing...
In this ENDPIECE, I reflect on some of the lessons that I have learned during my twenty years of reviewing books. I also put forward the proposal that twenty years of writing book reviews is enough for this Clarson, in this lifetime.
Novel well-defined poly(phenylene oxide) (PPO) based block copolymers were polymerized from 4-bromo-2,6-dimethylphenol (BDMP) in the presence of a cobalt acetylacetonate (Co(acac)2) catalyst with dimethyl formamide (DMF) as a ligand and initiated with benzoyl peroxide (BPO) at 60 °C. The monomer copolymerized with vinyl acetate (VAc), polymethyl(meth)acrylate-b-poly(dimethyl siloxane)-b-polymethyl(meth)acrylate...
The effect of temperature and angle of incidence on the transmission spectra of a one dimensional photonic crystal for TE and TM polarizations has been studied. For a range of angle of incidence from 0° to 60°, the proposed structure works as an omni-directional reflector. For other angles of incidence more than 60°, the structure works as a selective TM-polarization filter i.e. a filter which completely...
Using zinc phosphate, micaceous iron oxide and their combination in the composition of the undercoat, a series of novel multilayer paint systems based on different silicone-urethane binders with the same R/Si and Ph/R ratio have been formulated. The developed paint systems showed excellent mechanical, adhesion and chemical properties. Scanning Electron Microscopy (SEM) analysis of the surface of the...
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