Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Abstract Beads of chitosan (CS) crosslinked network and of chitosan/poly(ethylene oxide) (CS/PEO) semi‐interpenetrating network (semi‐IPN) were prepared by a dropping technique and characterized. PEO content in the beads of semi‐IPN was determined by gel permeation chromatography. CS crosslinking ratio was evaluated q…
Abstract Solution fractionation for four different polyethylenes including high‐density polyethylene (HDPE), low‐density polyethylene (LDPE), linear low‐density polyethylene (LLDPE), and very low‐density polyethylene (VLDPE) are conducted by stepwise controlling both the temperature and the amount of precipitant. The…
The results of the $^{13}\mathrm{C}\phantom{\rule{0.3em}{0ex}}\text{NMR}$ spectra and nuclear spin-lattice relaxation rate $1∕{T}_{1}$ for the quasi-one-dimensional quarter-filled organic material ${(\text{TMTTF})}_{2}\text{SCN}$ are presented. Below the anion ordering temperature $({T}_{\text{AO}})$, a new broad line…
Although silicon is an indirect bandgap material, light emission from reverse biased pn junctions has been observed. Although the quantum efficiency is low, it will be very advantageous to utilise these devices in all-silicon optoelectronic integrated circuits (OIC's). In this paper a review of our large area display…
Abstract The compounding process directly influenced the compounding quality of wood–polymer blends and finally affected the interfacial bonding strength and flexural modulus of the resultant composites. With 50 wt % wood fiber, the optimum compounding parameters for the wood‐fiber/high‐density‐polyethylene blends at…
The role of the evanescent part of the unoccupied complex band structure in photoemission from surface states is revealed. The frequency dependence of the emission intensity from two surface states on the (100) and (111) surfaces of Al in the photon energy range from 40 to 110 eV is explained within an ab initio one-s…
The development of high-load, soluble oligomeric sulfonate esters, generated via ROM polymerization, and their utility in the facile benzylation of an array of amines is reported. These polymeric sulfonate esters exist as free-flowing powders, are stable at refrigerated temperatures, and are readily dissolved in CH(2)…
Magnetic and transport properties of $\mathrm{Ca}{\mathrm{Mn}}_{1\ensuremath{-}x}{\mathrm{Ru}}_{x}{\mathrm{O}}_{3}$ $(x=0;0.1;0.15)$ perovskites were investigated in the temperature range $4.2--280\phantom{\rule{0.3em}{0ex}}\mathrm{K}$, magnetic fields up to $15\phantom{\rule{0.3em}{0ex}}\mathrm{kOe}$ and hydrostatic…
[NH(4)](2)Mn(3)(H(2)O)(4)[Mo(CN)(7)](2).4H(2)O (1) has been synthesized by slow diffusion of aqueous solutions containing K(4)[Mo(CN)(7)].2H(2)O, [Mn(H(2)O)(6)](NO(3))(2), and (NH(4))NO(3). Compound 1 crystallizes in the monoclinic C2/c space group. The basic motif of the three-dimensional structure consists of a Mo1-…
We have studied the behavior of a low molecular mass organosiloxane ferroelectric liquid crystal at the air−water interface. Data obtained with Langmuir isotherms, surface potential measurements, and Brewster angle microscopy are presented and discussed. The compound forms films on the Langmuir trough, with phase tran…
Der einzige kinetisch relevante Schritt in der katalytischen CH4-Aktivierung auf Ir-Clustern ist – nach einer detaillierten Analyse – die C-H-Aktivierung (siehe Bild). Sie ist auf der Oberfläche kleiner Ir-Cluster auf Oxidträgern begünstigt und wird auch für andere Edelmetallkatalysatoren nachgewiesen. Andere Elementa…
Abstract Wood adhesives derived from softwood bark pyrolysis oils (PO) and isocyanates (pMDI) have been developed for particleboards with a non-conventional blending system. The PO produced by the vacuum pyrolysis Pyrocycling™ process was used to replace between 30 and 40% by weight of the pMDI in a 4% adhesive-contai…
In this work a method for the estimation of pore anisotropy, b, in porous solids is suggested. The methodology is based on the pore size distribution and the surface area distribution, both calculated from trivial N2 adsorption-desorption isotherms. The materials used for testing the method were six MCM-Alx solids in…
Abstract The importance of alloys and blends has increased gradually in the polymer industry so that the plastics industry has moved toward complex systems. The main reasons for making polymer blends are the strengthening and the economic aspects of the resultant product. In this study, I attempted to improve compatib…
In this study, the oxidative polycondensation reaction conditions of 2-[(4-fluorophenyl) imino methylene] phenol (FPIMP) with air oxygen and NaOCl were studied in an aqueous alkaline medium between 60 and 90 °C. Synthesized oligo-2-[(4-fluorophenyl) imino methylene] phenol was characterized by 1H-NMR, FT-IR, UV–Vis, s…
The dielectric spectra for the series poly(dimethyl itaconate) to poly(di- n -octyl itaconate) have been measured and are discussed within the context of a main-chain−side-chain nanomorphology. The major dielectric event is associated with the calorimetric glass transition. In contrast to methacrylate family of polyme…
We have analyzed the structure and composition of the first layer of an ${\text{Al}}_{72}{\text{Co}}_{16}{\text{Ni}}_{12}$ tenfold surface by means of scanning tunneling microscopy (STM), ion scattering spectroscopy (ISS), and Auger electron spectroscopy (AES). High-resolution STM images reveal local structures that h…
Fangen spielen mit Terbium: Neue hydrophobe Kontakte und bindende Aminosäuren wurden bei der Röntgenstrukturanalyse (2.0 Å Auflösung) eines chemisch entwickelten, 17 Aminosäurereste umfassenden Lanthanoid-bindenden Peptids im Komplex mit Tb3+ nachgewiesen (siehe Bild). Diese Befunde sind in Einklang mit denen von Lumi…
The preparation and physical characterization are reported for a novel single-molecule magnet [Mn(12)O(12)(OAc)(12)(dpp)(4)] (dppH = diphenyl phosphate) with no coordinating water molecules. The crystal structure analysis reveals that there are four five-coordinate Mn(III) ions with Mn.H approaches. Addition of water…
Abstract Soy protein concentrate, a potential alternative of petrochemical polymers, has been crosslinked with furfural at 0.5,1, 2.5, 5, and 7.5% (w/w). The materials were then compression‐molded into plastic tensile bars and tested for tensile and yield strength, percentage elongation, and water absorption. The infr…