Materials Literature
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Sterical effects and the coupling between the cationic dynamics and the anionic-supralattice distortions lead to a series of phase transitions in the crystals of diguanidinium tetraiodoplumbate, $[\mathrm{C}({\mathrm{NH}}_{2}{)}_{3}{]}_{2}^{+}\ensuremath{\cdot}{\mathrm{PbI}}_{4}^{2\ensuremath{-}}.$ The crystals have b…
Through the neutralization reaction of zinc oxide (ZnO) and methacrylic acid (MAA) or acrylic acid (AA), zinc methacrylate (ZMA) or zinc acrylate (ZA) was in situ prepared in nitrile rubber (NBR). The mechanical properties and crosslinking structure of the resulting peroxide-cured NBR vulcanizates were studied. The re…
A new diimide-dicarboxylic acid, 2,2′-dimethyl-4,4′-bis(4-trimellitimidophenoxy)biphenyl (DBTPB), containing a noncoplanar 2,2′-dimethyl-4,4′-biphenylene unit was synthesized by the condensation reaction of 2,2′-dimethyl-4,4′-bis(4-minophenoxy)biphenyl (DBAPB) with trimellitic anhydride in glacial acetic acid. A serie…
The effect of various silane coupling agents on glass fiber surfaces has been studied in terms of the surface energetics of fibers and the mechanical interfacial properties of composites. γ-Methacryloxypropyltrimethoxysilane (MPS), γ-aminopropyltriethoxysilane (APS), and γ-glycidoxypropyltrimethoxysilane (GPS) were us…
Nanoparticles with either physically adsorbed or covalently bound poly(ethylene oxide) (PEO) coatings were produced from various combinations of poly(lactic acid) (PLA) and diblock or triblock copolymers of PLA and PEO. The particles were produced by the salting-out process and purified by the cross-flow filtration te…
The polymer products arising from the hydrochloric acid treatment of aqueous pyrrole were shown to have spectroscopic data consistent with alternating pyrrole and pyrrolidine units with varying degrees of ring opening of the pyrrole units. The acid catalysed polymerisation of pyrrole offers a facile route to polymers…
The morphological development of oxygen bubbles in amorphous, anodic alumina is examined during anodizing an Al‐1 atom % Cu alloy. Using transmission electron microscopy, a sequence of stripped films reveals the dynamic evolution of numerous bubbles in the thickening film. The formation of the bubbles is associated wi…
The effect of plasma-induced surface crosslinking of poly(vinyl chloride) (PVC)-based flexible films was investigated to limit its migration from packaging into fatty foodstuffs. The global migration was monitored by immersion into isooctane and the specific migrations of di-2-ethylhexyladipate (DEHA) and epoxidized s…
Acid-sensitive transferrin and albumin conjugates with doxorubicin have recently been developed with the aim of circumventing the systemic toxicity and improving the therapeutic efficacy of this anticancer agent. The in vitro activity of two acid-sensitive transferrin and albumin doxorubicin conjugates and free doxoru…
Near infrared spectroscopy was used to study the vibrational modes of isolated silanol groups in porous silica monoliths that had been heated in acuo at 750°C. A set of bands is assigned to overtone and combination transitions for normal modes involving mainly the SiOH group: the νOH stretching, the νSi–OH stretching,…
D,L-3-Methylglycolide (MG) was synthesized via two step reactions with a good yield (42%). It was successfully polymerized in bulk with stannous octoate as a catalyst at 110 °C. The effects of the polymerization time and catalyst concentration on the molecular weight and monomer conversion were studied. Poly(D,L-lacti…
The influences of the applied stress and the stress concentration factor (Kt) on hydrogen embrittlement were investigated in the commercial JIS SCM440 steel with the tensile strength of 1403 MPa. The applied stress was changed from 0.33 times to 0.72 times the tensile strength of the notched specimen, while the Kt was…
Some polyimide films based on cyclobutane-1,2,3,4-tetracarboxylic dianhydride (CBDA) and aromatic diamines were synthesized to investigate their temperature resistance and percent transmission of light. The preparations of CBDA were investigated; they produced almost 10 times the yield of CBDA in comparison to yields…
The reaction of Se(SiMe3)2 with mixtures of copper(I) chloride and indium(III) chloride in the presence of phosphine ligands PR3 (R = organic group) yielded the new clusters [Cu6In8Se13Cl4(PPh3)6(C4H8O)] 1, [Cu6In8Se13Cl4(PnPr2Ph)12] 2 and [Cu11In15Se16(SePh)24(PPh3)4] 3. The molecular structures of 1, 2 and 3 have be…
The formation of host-guest complexes between C60 and polybenzyl ether dendrimers with different central cores (phloroglucinol, meso-tetraphenylporphyrin, cyclotriveratrylene) has been investigated in organic solvents by means of 13C-NMR and UV-Vis spectroscopy. The interior of the dendrimers with a phloroglucinol cor…
Incorporation of 9(10H)-acridone as a chromophore into a seven-coordinate chelating ligand allows observation of sensitised luminescence from the europium(III) complex, even with excitation wavelengths greater than 410 nm.
A novel blend of polypropylene (PP) with Chlorella, a natural microalga, was synthesized successfully by a melt-mixing method with maleic anhydride-modified polypropylene (MPP) as a compatibilizer. The adhesion of hydrophobic PP to hydrophilic Chlorella is based on the formation of chemical bonds between the maleic an…
Glassy carbon electrodes were electrochemically modified by an anodization/cathodization procedure in aqueous H 2 SO 4 . Depending on the anodization time, the active‐layer thickness could be controlled from less than a micrometer to nearly 100 μm. Electrochemical impedance measurements indicated that the capacitance…
Isotactic polypropylene (iPP) has been crystallized in the presence of talc under the quiescent state and shear flow of injection molding. The resulting morphology has been investigated by means of polarizing microscopy, transmission electron microscopy, and wide angle X-ray diffraction. In the quiescent state, the iP…
The formation and thermal stability of the catalytically important anhydrous acids H3PM12O40 (M = Mo,W,V), of the corresponding anhydrides PM12O38.5 and of a novel first time isolated trihydrate H3PW12O40·3H2O have been studied by high temperature X-ray diffraction (XRD) and thermogravimetry (TG). The corresponding cr…