Materials Literature
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Abstract A series of methacrylate‐based chelating polymers was synthesized by the reaction of 3‐hydroxy‐4‐acetylphenyl methacrylate with amines (e.g., ethylenediamine, propylenediamine, and phenylenediamine) in tetrahydrofuran. The chelating polymers were characterized by infrared (IR) and carbon‐13 nuclear magnetic r…
Abstract Gelatin/montmorillonite (MMT) hybrid nanocomposites with improved thermal and mechanical properties were prepared in a previous work. The swelling behavior (swelling rate, swelling kinetics, maximum solvent uptake, etc.) of the obtained composites was investigated. The results showed that the swelling process…
Abstract Composites based entirely on renewable materials with flax fibers as reinforcement and cellulose acetate butyrate (CAB) as the matrix were prepared by compression molding. Scanning electron microscopy of the fracture surfaces showed insufficient penetration of the matrix into the fiber mat. Rheological measur…
Abstract The mechanical, thermal, rheological, and morphological properties of polypropylene (PP)/polystyrene (PS) blends compatibilized with styrene–isoprene–styrene (SIS), styrene–butadiene–styrene (SBS), and styrene–butadiene–rubber (SBR) were studied. The incompatible PP and PS phases were effectively dispersed by…
Abstract The structural characterization of polyesters of citric acid (CA) with ethylene glycol and long‐chain aliphatic alcohols (ROH), prepared by the composition of the reaction mixture being adjusted slightly away from stoichiometric equivalence, was performed with 1 H‐ and 13 C‐NMR spectroscopy. The aliphatic alc…
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTSynthesis of a Stable Helical Peptide and Grafting on Gold NanoparticlesPaolo Pengo, Quirinus B. Broxterman, Bernard Kaptein, Lucia Pasquato, and Paolo ScriminView Author Information CNR-ITM Sezione di Padova and Università di Padova, Dipartimento di Chimica Organica, via Marzo…
The low-temperature specific heat $C(T,H)$ of the superconductor ${\mathrm{MgCNi}}_{3}$ has been measured in detail. $\ensuremath{\Delta}C/{\ensuremath{\gamma}}_{n}{T}_{c}=1.97$ is estimated from the anomaly at ${T}_{c}.$ At low temperatures, the electronic contribution in the superconducting state follows ${C}_{\math…
Overview of the automotive plastics market, Susan J. Babinec and Martin C. Cornell plastics processing, Steven D. Stretch formulating plastics for paint adhesion, Dominic A. Berta polymers for coatings for plastics, J. David Nordstrom performance and durability testing, Philip V. Yaneff painting problems, Clifford K.…
Abstract The effects of an organic phosphorus nucleating agent on the crystallization behavior and mechanical properties of poly(propylene) were investigated. As the concentration of nucleating agent increased from 0 to 0.8%, the tensile and flexural strengths of the nucleated poly(propylene) resin increased by 15%, t…
Zinc oxide nanoparticles coated with zinc aluminate have been prepared by performing Al2O3 precipitation on the precursor basic carbonate of zinc (BCZ) of zinc oxide. TEM shows that a homogeneous layer is formed on the surface of the zinc oxide nanoparticles, and the coated particle size is about 50–60 nm. The thickne…
Two molecule-based magnets, [Mn(2)(tea)Mo(CN)(7)].H(2)O, 1, and [Mn(2)(tea)Mo(CN)(7)], 2 (tea stands for triethanolamine), formed with the 4d ion building block, [Mo(CN)(7)](4)(-), Mn(II) ions, and an additional ligand, tea, have been prepared and structurally characterized by single-crystal X-ray analyses. Whereas 1…
Miscible blends of perdeuteriopoly(ethylene oxide) (d 4 PEO) and poly(methyl methacrylate) (PMMA) were studied using deuterium NMR over the concentration range of 0.5−30% d 4 PEO using 2−4 Larmor frequencies ranging from 31 to 76 MHz. Spin−lattice relaxation times and line widths were measured from 300 to 475 K. Over…
Abstract The interfacial adhesion between a wood fiber and a plastic matrix strongly influences the performance of wood‐fiber‐reinforced thermoplastic composites. Fiber surface modification with coupling agents is generally needed to induce bond formation between the fiber and polymer matrix. This study investigated t…
Abstract This article describes the preparation of novolac‐type phenolic resin/silica hybrid organic–inorganic nanocomposite, with a sol–gel process. The coupling agent was used to improve the interface between the organic and inorganic phases. The effect of the structure of the nanocomposite on its physical and chemi…
High refractive index optical thin films of nano-ZnS/polythiourethane (PTU) composites have been prepared via immobilization of thiophenol (PhSH)/mercaptoethanol (ME)-capped ZnS nanoparticles into a PTU matrix. PhSH/ME-capped ZnS particles with a diameter of 2–6 nm were synthesized by reacting zinc acetate with H2S in…
The conformation and melting of both hexadecylammonium ion, n -CH 3 (CH 2 ) 15 NH 3 +, and neutral hexadecylamine, n -CH 3 (CH 2 ) 15 NH 2, within the clay silicate galleries have been studied by Fourier transform infrared spectroscopy (FTIR). The conformational ordering of the alkyl tail in the confined system shows…
We present a study of p-type doping of CdTe and Cd$_{1-x}$Mn$_x$Te quantum wells from surface states. We show that this method is as efficient as usual modulation doping with nitrogen acceptors, and leads to hole densities exceeding $2 \times 10^{11}$ cm$^{-2}$. Surface doping was successfully applied to obtain carrie…
We present a new method of ab-initio electronic-structure calculation including the spin-fluctuation (SF) self-consistently. We start from the Luttinger-Ward functional given as the sum of the LDA functional plus the temperature-dependent part of the SF energy functional. The size of interactions used in it are determ…
Tri- and nonaferrocenyl thiol dendrons have been synthesized and used to assemble dendronized gold nanoparticles either by the ligand-substitution method from dodecanethiolate-gold nanoparticles (AB(3) units) or Brust-type direct synthesis from a 1:1 mixture of dodecanethiol and dendronized thiol (AB(9) units). The de…
Glasses containing mixtures of cations and anions of nominal compositions [Sb 2 O 3 ] x – [ZnCl 2 ] 1− x where x = 0.25, 0.50, 0.75, and 1.00, have been studied by means of neutron diffraction and Raman and Mössbauer spectroscopy. There is preferential bonding within the system with the absence of Sb–Cl bonds. Antimon…