What You Can’t See Can Hurt You! Coating Over Surface Salts is Risking Premature Failure
What you can’t see can hurt you – especially if the hidden contaminant is soluble surface salts.
Materials Literature
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Properties of high impact polystyrene flame retarded by magnesium hydroxide and modified with triblock copolymer styrene/butadiene/styrene
Mechanical, combustible and smoke properties of two series of high impact polystyrene (PS-HI) compositions differing in the content of flame retardant [Mg(OH)2] and amount of a modifier (SBS) mentioned in the title (Table 1). In the first series of experiments [50 wt. % of Mg(OH)2] it has been found that modification…
Model to predict the mechanical behaviour of oriented rigid PVC
The mechanical properties of PVC sheets can be modified substantially by both uniaxial and biaxial stretching of the material above its glass transition temperature. Previous experimental studies have established a clear pattern in the relationship between tensile properties of oriented PVC products and imposed strain…
Recent technical trends in the market for E-PVC in Europe
The development of new emulsion resins (also known as dispersion or paste resins) continues despite dramatic changes in the applications sector for these types of resins. Suppliers of such resins still find the need to innovate constantly in order to maintain a market position and to both lead and follow the technical…
Galvanic Corrosion Between the Nuclear Waste Disposal Container Material Pairs of Copper-Nickel Alloys and Carbon Steel in Salt Brines
In the present work, the galvanic corrosion of candidate disposal container material pairs of Cu-Ni 90-10/TStE355 carbon steel (CS) and Cu-Ni 70-30/TStE355 steel (contact specimens), respectively, has been investigated in two disposal-relevant salt brines at 150°C, both without gamma irradiation and in the presence of…
Resistivity of Thin Copper Interconnection Layers
Resistivity is observed quantitatively in a thin electroplated copper layer. A resistivity of 2.6 µΩ·cm is observed in a 600-nm-thick as-deposited copper layer by conventional electroplating. This resistivity increases rapidly with decreasing thickness and reaches 7.8 µΩ·cm at a thickness of 75 nm. This rapid increase…
Rotational Moulding of PVC Plastisol
Abstract The viscosity during the earlier stages of the gelation process of plastisols formulated with 15 different commercial plasticizers has been obtained. Plastisols prepared were rotomoulded and mouldings obtained were characterized according to their wall thickness distribution. This parameter strongly depends o…
Self-Assembly of Gold Nanoparticles Utilizing a Charge-Transfer Interaction between Carbazolyl and Dinitrophenyl Units
Abstract Colloidal gold nanoparticles self-assembled into macroscopic aggregates by a charge-transfer interaction between a 9-carbazolyl unit as an electron-donor immobilized on the surface of the gold nanoparticles and a bivalent linker containing two dinitrophenyl units as electron-acceptors. Transmission electron m…
Carbamoylation Applied for Structure Determination of Cellulose Derivatives
Abstract Carbamoylation of cellulose esters (CE) and investigation of the mixed derivatives obtained with NMR spectroscopy represents a useful analytical tool for the determination of the degree of substitution (DS) and analysis of the distribution of substituents on the level of the anhydroglucose unit (AGU). Especia…
Synthesis, Characterization and Blood Compatibility of Copolymers Derived from Polyamidoamines and Vinyl Acetate
This work reports the synthesis of two different polyamidoamines (PAAs), by the reaction of piperazine (Pip) and cyclohexylamine (CHA) with N,N′‐methylene bis acrylamide (MBA), which subsequently copolymerized with vinyl acetate (VAC) to improve the mechanical properties of the materials. The materials were characteri…
Crystallographic Effects of Larger Indium Ion Substitution in NiFe2-xInxO4(x = 0, 0.2, 0.5, and 1.0) System
The crystallographic and magnetic properties of a series of substitutions in nickel ferrite where the Fe³+ is replaced with In³+ have been investigated using X-ray diffraction (XRD) and Mossbauer spectroscopy. Information on the exact crystalline structure, lattice parameters, bond lengths and bond angles were obtaine…
Experimental Study of Sulfur Solubility in Silicate Melts Coexisting with Graphite as a Function of Silicate Melt Composition
Abstract. Sulfur (S) solubility is determined in silicate melts, in particular with low-FeO content coexisting with graphite. In a high FeO range (>10 mol %), the S solubility is strongly dependent on the FeO content in silicate melt, which is in good agreement with previous works. In an intermediate FeO range (1∼10 m…
Molecular Weight Dependence of Phase Behavior in Side-Chain Liquid Crystalline Polymer Which Exhibits Reentrant Nematic Phase
We prepared poly(6-[4-(4'-cyanophenyl)phenoxy]hexyl acrylate)s with various molecular weights ( M n ) and narrow molecular weight distributions, and examined the M n dependence of phase behavior which includes the reentrant nematic (RN) phase. Polymers with M n lower than 20,000 form nematic (N), smectic A (SmA) and R…
Liquid crystal alignment on isotropic submicro‐textured surfaces of homeotropic‐planar states
The equilibrium configuration of liquid crystal molecules in contact with a periodicly patterned substrate has been theoretically analysed considering the variation of the order parameter at the interface, and a first order transition was predicted for a critical periodicity, or induced by temperature or an electric f…
Temperature Dependence of the Kinetics of Diffraction Gratings Formation in a Polymer Matrix Containing Azobenzene Chromophores: Monte Carlo Simulations and Experiment
We use the framework of recently formulated kinetic model of temperature-dependent processes accompanying the recording and erasure of diffraction gratings in a polymer matrix doped with azobenzene chrompohores under the illumination with spatially modulated and linearly polarized light to study general features of te…
Rayleigh-Brillouin light scattering in chalcogenide glasses of the Ge-Sb-S system
The Rayleigh-Brillouin light scattering in chalcogenide glasses of the Ge-Sb-S system in the (Sb 2 S 3 ) x (GeS 2 ) 100− x ( x = 0–50) set is investigated. The longitudinal hypersonic velocity, the high-frequency longitudinal elastic modulus, the extinction coefficient at the wavelength λ = 0.6328 μm, and the Landau-P…
Dispersão de nanopartículas de ZrO2 visando produção de nanocompósitos de ZrO2 em matriz de Al2O3
Sistemas de materiais nanoestruturados são mais comumente definidos como aqueles que contêm pelo menos uma característica microestrutural com dimensões nanométricas (até 150 nm). O interesse em nanocompósitos de matriz cerâmica está associado à melhoria nas propriedades mecânicas e ao desgaste. Dispersões de pequenas…
Impact of lubricants on processing behaviour of U-PVC
The influence of different chemical classes of waxes, used commercially as internal and external lubricants, on the processing behaviour of PVC in profile extrusion is described, drawing on the results of systematic laboratory testing. The present study concentrates on long chain ester waxes, oxidised polyethylene wax…
Studies on the Thermostability of Modified Lyocell Dopes
Abstract Modification of Lyocell dopes with special additives enables the creation of new innovative materials. Additives with functional groups and active surfaces may initiate complex chemical reactions in cellulose/ N ‐methylmorpholine‐ N ‐oxide monohydrate (NMMO) solutions. The effect of carboxylic groups on the t…
Autosoliton in a structurally unstable crystal
It is shown that a spatially localized collective excitation of the atomic sublattice (autosoliton) appears and propagates in a structurally unstable crystal occurring in a pretransition state. The autosoliton, on the one hand, is a structural defect comprising two interphase boundaries separated by the second phase,…