Materials Literature
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Starre Drahtnetze: Konjugierte mikroporöse Polymernetzwerke sind durch Sonogashira-Hagihara-Kupplung zugänglich. Obwohl diese Materialien amorph sind, können Mikroporen- und Oberflächengröße über die Länge der Phenylenethinylen-Streben eingestellt werden (siehe Bild; das Netzwerk ist blau dargestellt, und ein 1,3,5-su…
A series of nine, frustrated, multidomain peptides is described in which forces favoring self-assembly into a nanofiber versus those favoring disassembly could be easily modified. The peptides are organized into an ABA block motif in which the central B block is composed of alternating hydrophilic and hydrophobic amin…
Rigid wiry nets: Conjugated microporous polymer networks are formed by Sonogashira–Hagihara coupling. Although these materials are amorphous, the micropore size and surface area can be controlled by varying the length of the phenyleneethynylene struts (see picture; the network is shown in blue, and one 1,3,5-substitut…
Abstract Fourier transform infrared (FTIR) spectroscopy, optical microscopy (OM), and differential scanning calorimetry (DSC) techniques were used to probe phase behavior and interactions in blends of poly(vinylidene fluoride) (PVDF) and polyesters [poly(trimethylene adipate) (PTA) and poly(pentamethylene adipate) (PP…
We have conducted highP-Tsynchrotron X-ray and time-of-flight neutron diffraction experiments as well as indentation measurements to study equation of state, constitutive properties, and hardness of nanocrystalline and bulk nickel. Our lattice volume-pressure data present a clear evidence of elastic softening in nanoc…
Abstract The morphology and mechanical properties of a styrene–ethylene/butylene–styrene triblock copolymer (SEBS) incorporated with high‐density polyethylene (HDPE) particles were investigated. The impact strength and tensile strength of the SEBS matrix obviously increased after the incorporation of the HDPE particle…
Abstract In relation to the bulk high‐impact polystyrene process, this work investigates the partition between phases of styrene and an initiator: tert‐ butyl peroctoate. A Flory‐Huggins model was applied for predicting the phase separation point and the partitions of styrene and tert‐ butyl peroctoate. For blends of…
Abstract Epoxycyclohexyl polyhedral oligomeric silsesquioxane (epoxy–POSS) was used to prepare a chain‐extended poly(butylene terephthalate) (PBT) with a twin‐screw extruder. The effect of epoxy–POSS on the melt flow index, mechanical properties, rheological behavior, and thermal properties of chain‐extended PBT was i…
New, non-discoid M(II) complexes [MCl2(L)] {M = Mn, Zn; L = 2,6-diformyl-4-methylphenolbis[3′,4′,5′-tris(hexadecyloxy)phenylimine]} have been prepared and shown to exhibit columnar mesophases, the nature of which was found to be metal-dependent. As analysed by DSC and small-angle X-ray diffraction experiments, the com…
AbstractObjective:To report a case in which the anticoagulation effect of warfarin appeared to have been potentiated by chitosan, probably due to interference with the absorption of vitamin K.Case Summary:An 83-year-old male with hypertensive cardiovascular disease, type 2 diabetes mellitus, and chronic atrial fibrill…
Abstract In this study, montmorillonite (MMT)/poly(ϵ‐caprolactone)‐based polyurethane cationomer (MMT/PCL‐PUC) nanocomposites were prepared and their mechanical properties, thermal stability, and biodegradability were investigated. PCL‐PUC has 3 mol % of quaternary ammonium groups in the main chain. The MMT was succes…
Abstract Ethynedithiol‐based polyeneoligosulfides have been synthesized in 96% yield by the reaction of sodium acetylides (HCCNa, NaCCSNa) and elemental sulfur through the NaC sp bond in liquid ammonia with the following spontaneous polymerization of ethynedithiols (HSCCSH) formed by the hydrolysis. The polyeneoli…
Coupling between axial and torsional degrees of freedom often modifies the conformation and expression of natural and synthetic filamentous aggregates. Recent studies on chiral single-walled carbon nanotubes and B-DNA reveal a reversal in the sign of the twist-stretch coupling at large strains. The similarity in the r…
The extrapolation length adopted in the Tilley–Zeks model of ferroelectric thin films plays a substantial role in governing the dielectric properties of thin films through the boundary conditions. The boundary conditions under an applied field are reexamined. The exact formulas for the transition temperature, the diel…
We propose a theory of microphase separation of the double-grafted copolymer melts with different types of branch point distribution. It is shown that copolymers with gradient sequence of the branch points form a microstructure easier (at smaller values of the Flory-Huggins parameters) than equivalent copolymers with…
Abstract Polycondensation‐type poly(amic acid) (PAA) was synthesized with 3,3′,4,4′‐benzophenonetetracarboxylic dianhydride as a dianhydride monomer and 4,4′‐diaminodiphenylmethane and 4,4′‐oxydianiline as diamine monomers under microwave irradiation in dimethylformamide. Then, PAA was used to make polyimide (PI) by i…
Abstract A series of molecular‐weight‐controlled imide resins end‐capped with phenylethynyl groups were prepared through the polycondensation of a mixture of 1,4‐bis(4‐amino‐2‐trifluoromethylphenoxy)benzene and 1,3‐bis(4‐aminophenoxy)benzene with 4,4′‐oxydiphthalic anhydride in the presence of 4‐phenylethynylphthalic…
The Oxford Protein Production Facility (OPPF) was established to develop methods for high-throughput protein production and crystallization. As part of these developments, and in the context of the European SPINE project, a pilot study was undertaken on 48 proteins from Bacillus anthracis from protein families which w…
Recently, the importance of the orbital degrees of freedom (the multipole moment) has been clarified in the f-electron systems. In particular, the multipole ordering that the multipole moment orders spontaneously have been intensively studied because of the appearance of the unusual behaviors which have not known.\n\n…
The catalytic oxidation of thiols to the corresponding disulfides using Preyssler's catalyst H(14)[NaP(5)W(30)O(110)] has been studied. These highly selective oxidations gave good yields of the target disulfides.