Materials Literature
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Abstract A poly(amic acid) was prepared through the reaction of 4,4′‐(hexafluoroisopropylidene)diphthalic anhydride and 2,2′‐bis(trifluoromethyl) benzidine in N,N ‐dimethylacetamide. Hybrid films were obtained from blend solutions of the precursor polymer and the organoclay dodecyltriphenylphosphonium–mica, with the o…
At the air-water interface, ${4}^{\ensuremath{'}}\text{\ensuremath{-}}8\text{\ensuremath{-}}\text{alkyl}[1,{1}^{\ensuremath{'}}\text{\ensuremath{-}}\text{biphenyl}]$-4-carbonitrile (8CB) domains with different thicknesses coexist in the same Langmuir film, as multiple bilayers on a monolayer. The edge dislocation at t…
Abstract The nonisothermal crystallization kinetics of poly(ethylene terephthalate) (PET) copolymers modified with poly(lactic acid) (PLA) were investigated with differential scanning calorimetry, and a crystal morphology of the samples was observed with scanning electron microscopy. Waste PET (P100) obtained from pos…
Abstract The modified waterborne polyurethane (WPU) with enhanced mechanical properties has been prepared after introducing lignosulfonate calcium (LS). Meanwhile, the LS was associated with WPU component by chemical grafting and/or physical attraction and hence produced a star‐like network with LS and its supramolecu…
The total interaction cross sections ( sigma(t)) of some sugars and amino acids and five elements: lithium, carbon, oxygen, aluminium and calcium have been measured for 6.4 keV, 13.95 keV, 14.4 keV, 17.74 keV, 24.14 keV, 30.8 keV, 35 keV, 59.54 keV, 81 keV, 122 keV and 136 keV photons in a narrow beam good geometry se…
We address, in a three-dimensional spatial setting, both the viscous and the standard Cahn–Hilliard equation with a nonconstant mobility coefficient. As shown in Barrett and Blowey (1999 Math. Comput. 68 487–517), one cannot expect the uniqueness of the solution to the related initial and boundary value problems. Neve…
The mixed valence Mn3+/Mn4+ and Co3+/Co4+ in manganites and cobaltites with the perovskite structure is absolutely necessary for the appearance of magnetotransport properties. It is shown that in these systems the Jahn Teller effect of the transition element, the charge and orbital ordering and the oxygen stoichiometr…
Body-centered $\mathrm{B}{\mathrm{C}}_{2}\mathrm{N}$ deduced from the unit cell of the recently predicted body-centered carbon [F. J. Ribeiro et al., Phys. Rev. B 74, 172101 (2006)] are studied with first-principles pseudopotential density functional method. The structural, electronic, and mechanical properties are in…
Designed for the general engineering student, Introduction to Engineering Materials, Second Edition focuses on materials basics and provides a solid foundation for the non-materials major to understand the properties and limitations of materials. Easy to read and understand, it teaches the beginning engineer what to l…
Metallic zinc nanoparticles (NPs) of 5-15 nm in diameter, formed in silica glass (SiO(2)) by Zn ion implantation of 60 keV, showed a strong ultraviolet absorption peak at around 4.8 eV, which has been assigned as the surface plasmon resonance (SPR) of Zn NPs, and another small peak at 1.2 eV, which has never been repo…
J. Asara et al. reported that collagen proteins from well-preserved ancient fossil bones from a 160,000- to 600,000-year-old mastodon and a 68-million-year-old T. rex can be extracted and sequenced (“Protein sequences from mastodon and Tyrannosaurus rex revealed by mass spectrometry,” 13 April,
In this study, we have investigated the influence of the hydrothermal temperature on the properties of mesoporous silica materials. Mesostructures with a well-hexagonal array of their channel are prepared if the temperature is lower than 140 °C. Increasing the hydrothermal temperature leads to the formation of wormhol…
The keto-enol (K-E) tautomerization equilibrium, more precisely, the keto-amine/enol-imine equilibrium, has been investigated for a series of substituted salicylideneanilines in view of designing compounds with a contrast of second-order nonlinear optical properties. Substituting the salicylidene ring by an acceptor g…
Highly efficient single-walled carbon nanotube (SWNT) growth from Fe−Mo nanoparticle catalysts made by colloidal synthesis is demonstrated by water-assisted chemical vapor deposition. In a 10 min growth time, SWNT forests with heights up to 1.5 mm were synthesized possessing a 2.8 nm average diameter, carbon purity ab…
Common polymers are long chain molecules based on carbon. Like metals and ceramics, a single polymer molecule may contain millions of individual atoms, all bonded together. It is not possible to determine exactly how many carbon (C) and hydrogen (H) atoms are linked together in a single molecule of polyethylene ([CH C…
The widespread use of conducting polymers in technological applications has been hindered by poor processability; strong intermolecular interactions prohibit thermal processing and reduce solubility in conventional solvents. To date, there has been a focus on the disruption of these interactions through the functional…
β-Barium borate (β-BaB 2 O 4, β-BBO) films were deposited on fused silica substrates by spin coating poly(vinyl pyrrolidone) (PVP)-modified metallo-organic solutions. Film thicknesses of more than 500 nm were obtained by a single spin-coating step followed by O 2 plasma and thermal treatments. Crack formation was effe…
Abstract Attempts have been made to investigate the effects of ethylene–propylene–diene monomer (EPDM) rubber structural parameters on the developed microstructure, mechanical properties, rheology, and oxygen gas permeability of EPDM/organically modified montmorillonite (O‐MMT) nanocomposite samples prepared via melt…
Abstract Epoxy composites based on aligned chemical vapor deposition–grown multiwall carbon nanotubes (MWCNTs), containing trapped iron nanoparticles, with weight fractions ranging from 0.03 to 1 wt%, were produced following a well‐known processing way. Electrical and mechanical properties as well as their densities w…
Abstract A series of poly(ϵ‐caprolactone) (PCL)/graphite oxide (GO) composites were synthesized through the ring‐opening polymerization of ϵ‐caprolactone with GO as an initiator. The crystallization behavior of the PCL–GO composites and the effects of the PCL–GO composites as nucleation agents on the crystallization b…