Materials Literature
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Abstract The nonisothermal and isothermal crystallizations of low‐density polyethylene (LDPE) and polypropylene (PP) in phosphate glass (Pglass)–polymer hybrid blends were studied through differential scanning calorimetry (DSC). As the Pglass volume fraction was increased, the percentage crystallinity decreased. The h…
Abstract The blend solution of cellulose xanthate with chitin xanthate has excellent filtering property as an ordinary cellulose viscose. The SEM photos show that the fiber surface becomes coarse with increasing chitin content. The X‐ray diffraction shows that the addition of chitin interferes with the crystallization…
A high-throughput screening system for secondary catalyst libraries has been developed by incorporation of an 80-pass reactor and a quantified multistream mass spectrometer screening (MSMSS) technique. With a low-melting alloy as the heating medium, a uniform reaction temperature could be obtained in the multistream r…
Abstract The local dynamics of three poly(propylene imine) dendrimers with hydrophilic triethylenoxy methyl ether terminal groups were studied in D 2 O by the measurement of the 1 H NMR relaxation times, which were treated with the Lipari–Szabo model‐free approach. The results showed that the overall mobility increase…
In this study, samples of poly(dimethylsiloxane) (PDMS) with different crosslink densities were prepared in order to produce samples with different crosslink density and, subsequently, different molecular mobilities. Crosslink density and chain mobility changes in PDMS networks were determined using differential scann…
Abstract The copolymerization of aniline and thiophene with varying concentration ratios was studied in acetonitrile/tetrabutylammonium tetrafloroborate. In situ UV‐vis and in situ surface resonance Raman spectroscopic studies revealed that polythiophene and polyaniline units of different lengths enter into the electr…
Abstract New biodegradable/biocompatible ABC block copolymers, poly(ethylene oxide)‐ b ‐poly(glycidol)‐ b ‐poly( L , L ‐lactide) (PEO‐PGly‐PLLA), were synthesized. First, PEO‐ b ‐poly(1‐ethoxyethylglycidol)‐ b ‐PLLA was synthesized by a successive anionic ring‐opening copolymerization of ethylene oxide, 1‐ethoxyethylg…
Abstract The blend materials from waterborne polyurethane (WPU)/starch (ST) with different contents (10–90 wt %) were satisfactorily prepared by using the solution casting method. Their miscibility, structure, and properties were investigated by wide‐angle X‐ray diffraction (WAXD), scanning electron microscope (SEM),…
The condensation of the CH acidic heterocycles 4-alkyl-2,6-dioxo-1,2,5,6-tetrahydropyridine-3-carbonitrile (5a and b) and barbituric acid (15) with electron-rich thiophene aldehydes and benzaldehyde derivatives affords the respective monomethine dyes 10-13 and 17-19. The formylation of 5a,b and 15 with N,N'-diphenylfo…
Abstract The phase behavior and the crystallization kinetics of blends composed of isotactic polypropylene (iPP) and linear low‐density polyethylene (LLDPE) were investigated by differential scanning calorimetry. The phase behavior indicates the formation of separate crystals of iPP and LLDPE at each investigated blen…
Abstract We synthesized an AB 2 ‐type monomer, 4‐{4‐[di(4‐aminophenyl)methyl]phenoxy}phthalic acid, which contained one phthalic acid group and two aminophenyl functionalities. The direct self‐polycondensation of the AB 2 ‐type monomer in the presence of triphenylphosphite as an activator afforded a hyperbranched poly…
The deuteron spin-lattice relaxation in the substoichiometric dideuterides ${\mathrm{HfD}}_{x}(1.68<~x<~1.90)$ and ${\mathrm{TiD}}_{x}(x=1.91)$ has been measured at temperatures between 300 and 830 K. The results are compared with previous proton NMR measurements on dihydrides of similar hydrogen contents. The d…
The first automated system for combinatorial synthesis and high throughput investigation of electrical properties of conductive polymers is described. The equipment provides a polymerization of defined mixtures of monomers into a thin layer on the addressed electrodes of an electrode array followed by measurements of…
The structural analysis of an enzymatic reaction intermediate affords a unique opportunity to study a catalytic mechanism in extraordinary detail. Here we present the structure of a tetrahedral intermediate in the catalytic cycle of aspartate-beta-semialdehyde dehydrogenase (ASADH) from Haemophilus influenzae at 2.0-A…
Poly(5,8-dialkoxyanthraquinone-1,4-diyl) P(5,8-OR-1,4-AQ) (R = n -C 6 H 13 through n -C 16 H 33 ), poly(5,8-dihydroxyanthraquinone-1,4-diyl) P(5,8-OH-1,4-AQ), poly(4,8-diaminoanthraquinone-1,5-diyl) P(4,8-NH 2 -1,5-AQ), poly(4,8- dihydroxyanthraquinone-1,5-diyl) P(4,8-OH-1,5-AQ), and poly(4,8-dinitroanthraquinone- 1,5…
We present electron-spin-resonance data of ${\mathrm{Ti}}^{3+}$ ${(3d}^{1})$ ions in single crystals of the novel layered quantum spin magnet TiOCl. The analysis of the g tensor yields direct evidence that the ${d}_{\mathrm{xy}}$ orbital from the ${t}_{2g}$ set is predominantly occupied and owing to the occurrence of…
Abstract The ultrasonic treatment of unfilled butadiene rubber (BR) gum with a grooved‐barrel ultrasonic reactor was carried out, leading to changes in the structure and physical properties. The ultrasonic treatment of BR gum led to gel formation, with the amount dependent on the amplitude. The rheological and mechani…
It is well known that overdamped and unforced dynamical systems do not oscillate. However, well-designed coupling schemes, together with the appropriate choice of initial conditions, can induce oscillations when a control parameter exceeds a threshold value. We demonstrate this effect in a specific system, a soft-pote…
High-throughput (HT) crystallization experiments were conducted with sertraline free base in the presence of mono-, di- and triacidic salt formers. Over 3600 crystallization trials were conducted, leading to the identification and characterization of 18 crystalline salt forms. Due to the large number of crystallizatio…
Resonant photoemission in the Pu $5f$ and Pu $6p$ states is compared to that in the Gd $4f$ and Gd $5p$ states. Spectral simulations, based upon an atomic model with angular momentum coupling, are compared to the Gd and Pu results. Additional spectroscopic measurements of Pu, including core level photoemission and x-r…