Materials Literature
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Abstract Ammonium polyphosphate (APP)/poly(butylene succinate) (PBS) composites were prepared with a unique water‐crosslinking technique to improve the flame retardancy and nondripping properties of the composites and to maintain the main structure of the composites during flame tests. The composites were treated with…
MOTIVATION: Accurate alignment of a target sequence to a template structure continues to be a bottleneck in producing good quality comparative protein structure models. RESULTS: Multiple Mapping Method (MMM) is a comparative protein structure modeling server with an emphasis on a novel alignment optimization protocol.…
Abstract To improve the mechanical properties and structure of poly(vinyl chloride) (PVC)/nano‐CaCO 3 nano composite, a core (nano‐CaCO 3 )/shell (SR) structured filler (40–60 nm) was successfully prepared by refluxing methyl vinyl silicone rubber (SR) and nano‐CaCO 3 particles (coupling agent KH550, KH560, or NDZ‐101…
Printed circuits: Aqueous polyacetylene dispersions were prepared by catalytic polymerization of acetylene in an aqueous emulsion with a cationic palladium catalyst with a bulky diphosphine ligand. Facile processing is demonstrated by ink-jet printing of the conductive-polymer dispersions to produce a functioning elec…
Abstract Trialkoxysilylated camphorsulfonamides have been used for the synthesis of functional organosilicas in a template‐directed hydrolysis‐polycondensation with tetraethylorthosilicate (TEOS). The sol–gel transformation leading to the formation of highly ordered materials indicates that trialkoxysilylated camphors…
Gedruckte Schaltkreise: Wässrige Polyacetylendispersionen wurden durch Polymerisation von Acetylen in wässriger Emulsion mit einem kationischen Palladiumkatalysator mit sperrigem Diphosphanliganden erhalten. Die einfache Verarbeitbarkeit wird durch Tintenstrahldrucken der Dispersionen belegt, bei dem eine funktioniere…
Three novel isotypic borophosphates M(II)[BPO4(OH)2] (M(II) = Mn, Fe, Co) have been hydrothermally synthesized and structurally characterized. The isotypic compounds crystallize in the chiral space group P3(1)21 or P3(2)21. Their crystal structures are characterized by edge-sharing helical M(II)O6-octahedral chains wo…
Abstract The octanuclear europium cluster compound [bmpyr] 6 [Eu 8 (μ 4 ‐O)(μ 3 ‐OH) 12 (μ 2 ‐OTf) 14 (μ 1 ‐OTf) 2 ](HOTf) 1.5 has been crystallized from the ionic liquid [bmpyr][OTf]. Structural characterization by single crystal X‐ray diffraction revealed an Eu 8 cluster unit which is centered by an oxide anion. The…
Ladder-like poly(vinylsilsesquioxanes)(LPVS) containing four parallel chains in the skeleton were synthesized by two steps: first, LPVS were prepared by a template sol–gel method from vinyltrichlorosilane (VTCS); then adjacent pendent vinyl groups were polymerized side by side along the LPVS chain. The resulting polym…
Abstract To investigate the effects of reactive end‐cappers on the performance of PI precursors and the resulting polyimide (PI) films, poly(amic acid)s (PAAs) as a base polymer of the positive‐working photosensitive polyimides (PSPIs) were synthesized via ring‐opening polymerization of 4,4′‐oxydiphthalic anhydride an…
Abstract New luminescent materials—aromatic polyketanils (PKs) containing p ‐phenylene and biphenylene linkages in the backbone and electron‐donating, side‐group substitutions—were synthesized via melt polycondensation with the goal of studying the interactions between the polymer chains (PKs), primary dopant [1,2‐(di…
Abstract X‐ray diffraction, infrared (IR), and electrical properties for pure and Er (NO 3 ) 3 ‐doped methyl‐2‐hydroxyethyl cellulose (MHEC) with concentrations of 0.5, 1, 2, 5, 7, and 10 wt % were studied. X‐ray analysis indicates that the addition of Er (NO 3 ) 3 , which is a crystalline material, to MHEC at concent…
The influence of carbon dioxide sorption on the closed-loop phase diagram of polystyrene- block -poly( n -pentyl methacrylate) copolymers, PS- b -PnPMA, was investigated. Differential dilation of the constituent blocks was used to induce microphase separation of the PS- b -PnPMA. With increasing carbon dioxide loading…
Abstract Wood–plastic composites were prepared through impregnation of solid wood with polyethylene. A resolution IV screening design of 16 runs for seven factors at two levels was adopted. The seven factors tested were ratio of maleated polyethylene in formulations, ratio of polyethylene of different molecular weight…
Abstract Foaming behaviors of four polystyrenes (PSs) filled and unfilled with various amounts of CaCO 3 using supercritical carbon dioxide were investigated. The PSs include three general purpose grades with different molecular weights (different melt index) and one high impact grade. By adjusting foaming conditions,…
The nondissociative adsorptions of O(2) on the neutral and anionic Au(24) have been studied using the density functional theory (DFT) in the generalized gradient approximation. Their geometrical structures are optimized by using a combination of the relativistic effective core potential and all-electron potential with…
Abstract Methyl‐tri(phenylethynyl)silane (MTPES) was successfully synthesized by the reaction of lithium phenylacetylide with methyltrichlorosilane. The structure was characterized by HRMS, FTIR, 1 H‐NMR, 13 C‐NMR, 29 Si‐NMR, and elementary analysis. Thermal cure process was monitored by DSC, DMA, and FTIR. MTPES was…
Abstract A continuous process is described whereby waste PTFE was converted into tetrafluoroethylene (C 2 F 4 , TFE), hexafluoroethane (C 2 F 6 , HFE), hexafluoropropylene (C 3 F 6 , HFP), and octafluorocyclobutane (c‐C 4 F 8 , OFCB). The waste PTFE was depolymerized inside a reactor that was heated by a radiofrequenc…
Abstract Static light scattering and viscosity measurements were performed on different molecular weight poly (ethylene oxide) to see the formation of aggregates in its dilute solutions. Viscosity measurements were carried out for PEO samples in water and methanol at 20–45°C and in chloroform at 20–30°C. Using Huggin'…
The coupled interaction between the reorientation of a liquid crystal and the migration of ionic impurities in the presence of an applied electric field is investigated for two device types commonly used in displays, the planar and the in-plane switching (IPS) cell. Simulated optical measurements and transient current…