Materials Literature
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Cellulose fibers are selected as a reinforced filler for thermoplastics due to their superior mechanical properties and lower price compared to the thermoplastics. In the present study chemithermomechanical pulp of hard wood (aspen) fibers having selected aspect ratio (length/diameter) were first encapsulated with pol…
The formation of sulfbismuthides and the extents of solid solutions in the system Ag2S-Cu2S-PbS-Bi2S3 were studied at 500øC using sealed and evacuated capsule methods. Liquid is present in the Cu•S-rich region of both the systems Ag•S-Cu•S-PbS and Cu•S-PbS-Bi2S3. In the system Ag•S-Cu•S-Bi•S • two new phases, Ag2Bi4S7…
Abstract Der Aufbau der isotypen Verbindungen Cs 2 Mn 3 S 4 und Cs 2 Co 3 S 4 wurde an Einkristallen bestimmt (Raumgruppe Ibam, Z = 4). Zur Deutung der magnetischen Eigenschaften des Cs 2 Mn 3 S 4 wurde die Mischkristallreihe Cs 2 (Mn x Zn 1‐x ) 3 S 4 untersucht. Neutronenbeugungsuntersuchungen ermöglichten darüber hi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMDI-based polyurethane ionomers. 2. Structure-property relationshipsDaychyuan Lee, Richard A. Register, Changzheng Yang, and Stuart L. CooperCite this: Macromolecules 1988, 21, 4, 1005–1008Publication Date (Print):April 1, 1988Publication History Published online1 May 2002Pu…
The order-disorder transformations in NaCN, KCN, and RbCN are studied under thermal cycling around ${T}_{c}$ by monitoring the change in optical transmission produced by the light-scattering properties of their multidomain ordered structures. The phase transitions in both NaCN (large-hysteresis cubic \ensuremath{\left…
Khellin, a naturally occurring furochromone, used in the past as a coronary vasodilator, has recently been used in the photochemotherapeutic treatment of vitiligo and psoriasis. With the aim of elucidating its mechanism of action, the interactions both in ground and excited states between the drug and DNA were studied…
Abstract Fifteen different pure polymers were studied by thermal methods under air, nitrogen, and nitrous oxide in order to determine their tendency to char in relation with their structure and the experimental conditions used. Styrene polymers and aliphatic polyolefines give chars under air and total volatilization w…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure of cellulose. 1. Low-energy conformations of single chainsIstvan Simon, Harold A. Scheraga, and R. S. John ManleyCite this: Macromolecules 1988, 21, 4, 983–990Publication Date (Print):April 1, 1988Publication History Published online1 May 2002Published inissue 1 Ap…
In principle the analysis of positions and shapes of diffraction peak profiles can reveal the imperfect crystalline structure of a sample. The parameters 'size' and 'strain' as obtained from the established Warren-Averbach method need to be used cautiously: in essence the order-independent and order-dependent parts of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInfluence of lithium perchlorate on the properties of polyether networks: specific volume and glass transition temperatureJean Francois Le Nest, Alessandro Gandini, Herve Cheradame, and Jean Pierre Cohen-AddadCite this: Macromolecules 1988, 21, 4, 1117–1120Publication Date (…
The dynamic response of surface-stabilized ferroelectric liquid crystals was studied on the basis of a continuum theory. In this work, polarization electric field was consistently introduced through Poisson's equation, including the polarization charge accompanied by an elastic deformation. An improved anchoring energ…
A thin layer of dye sandwiched between p-CuCNS deposited on a copper substrate and n-SnO 2 coated transparent glass was found to yield photocurrents resulting from light absorption in the dye. The mechanism of photocurrent generation is discussed.
Results of an investigation into the withstand voltage characteristics of a UHV-class tension insulator string covered with snow are reported. AC withstand voltage tests were conducted in a testing room and at an exposure testing station constructed in a heavy snow area. For insulator strings up to 10 m long, the with…
Abstract The kinetics and the morphology of selective dissolution of alloys containing a noble component and of pitting of passive metals are discussed emphasizing common properties of both localized dissolution processes. Dealloying of CuAu(Pd)‐alloys and pitting of aluminum and aluminum alloys are considered as typi…
We recorded fluorescence excitation and emission spectra of uro- and coproporphyrin under different experimental conditions, to see how these conditions influence quantifications based on measurement of fluorescence intensity. We found that, for bands alpha and beta of the emission spectra and the main peak of the exc…
Abstract Differential scanning calorimetry, Fourier transform infrared, and solid‐state carbon 13 nuclear magnetic resonance were used to study the silane coupling agent/epoxy resin interface. Penetration of epoxy into the hydrolyzed silane has been shown. The addition of a solvent can further increase the penetration…
Hydrogenated amorphous carbon (HAC) grains consist of graphitic islands randomly oriented to form a larger particle. These islands (which may be considered to be PAH-like) are poorly connected to each other with respect to energy transfer. An analysis of energy transfer between graphitic islands in HAC shows that abso…
Polymer-dispersed liquid crystal (PDLC) films are potentially useful for electronic displays, windows with electrically controllable light transmission, and other applications. PDLC film performance may depend strongly on the angular distribution of the light scattered by the films. We have measured the angular distri…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPentacoordinate iron-sulfur complexes. Structure and spectroscopic and electrochemical properties of phenoxy- and thiophenoxy-bridged binuclear complexesB. S. Kang, L. H. Weng, D. X. Wu, F. Wang, Z. Guo, L. R. Huang, Z. Y. Huang, and H. Q. LiuCite this: Inorg. Chem. 1988, 27…
Using a combination of Monte Carlo and analytical techniques we present an analysis of the random-walk problem of a particle diffusing in a system with energetic disorder. The particle is allowed to hop anywhere in the lattice and the rates vary exponentially with distance. We consider the number of new sites visited,…