Materials Literature
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Abstract A conductive poly(aniline codoped with dodecyl benzene sulfonic acid and hydrochloric acid) [PANI‐D/H, yield: 32.2%, intrinsic viscosity ([η]): 1.39 dL/g, electrical conductivity: 7.3 S/cm] was synthesized by chemical oxidative polymerization from aniline‐dodecylbenzene sulfonic acid salt (A‐DS)/aniline‐hydro…
Cyclopentadienylmanganese complexes of the general formula (η 5 -C 5 H 4 CH 3 )Mn(CO) 2 L, where L is a nonchelatable, bifunctional ligand, were found to be photochromic. Irradiation of (η 5 -C 5 H 4 CH 3 )Mn(CO) 2 L(3-cyanomethylpyridine) with alternating visible and UV light produced alternating yellow and red solut…
A single-step approach for the synthesis of polyphosphazenes containing sulfonic acid functionalities is developed. Polyphosphazene “sulfonation” is conducted via the direct replacement of chlorine atoms of the macromolecular precursor, poly(dichlorophosphazene), PDCP with a sulfonic acid containing nucleophile hydrox…
Porous alumina films with controllable pore sizes and having submicrometer film thicknesses were fabricated by the anodization of Al overlayers. The Al was deposited by sputtering onto either glass or onto silicon that had been coated with a layer of silicon nitride. Alumina membranes having thicknesses between 300 an…
Abstract The kinetics of the hydroformylation of high‐molecular‐weight cis ‐1,4‐polybutadiene in the presence of HRh(CO)(PPh 3 ) 3 and monochlorobenzene as a solvent were studied. The degree of conversion was examined by spectroscopic characterization with Fourier transform infrared and 1 H‐NMR analysis. According to…
Abstract Conductive and flexible polydimethylsiloxane (PDMS)/polypyrrole (PPy) composites were synthesized electrochemically. Electrochemical syntheses were performed at +1.10 V by using p ‐toluene sulfonic acid (PTSA) as supporting electrolyte and water as solvent. Composites were characterized by cyclic voltammetry,…
Recombinant Escherichia coli harboring the medium-chain-length (MCL) polyhydroxyalkanoate (PHA) synthase gene has been shown to accumulate MCL-PHAs from fatty acids when FadB is inactive. However, the enzymes in fadB mutant E. coli responsible for channeling the beta-oxidation intermediates to PHA biosynthesis have no…
Widely well-aligned two-dimensional ZnO nanodot arrays ( e.g. , 40,000 nanodots of 130 nm diameter and 9 nm height over 150 ×150 µm 2 with a period of 750 nm) have been fabricated by metalorganic chemical vapor deposition on SiO 2 /Si substrates patterned by focused ion beam (FIB). A low-magnification FIB patterning m…
Magnetic and structural properties of CrAs epilayers grown on GaAs(001) by molecular beam epitaxy have been studied. CrAs epilayers are orthorhombic for all thicknesses investigated but show a structural transition from a metastable phase for very thin films, to the usual bulk MnP-type orthorhombic phase at higher thi…
Abstract In this study, expanded starch/poly(vinyl alcohol) (PVA) blends for packing material were prepared by using calcium carbonate as the expansion inhibitor to investigate the degradability and the structural and mechanical properties of expanded starch/PVA/calcium carbonate blends (ESPCs). The structure of ESPCs…
Abstract The recombination of polycarbonate (PC) chains has been researched as one of the studies on self‐repairing materials. The specimens, which included sodium carbonate and Tri(2,4‐di‐t‐buthylphenyl)phosphate, were treated at 120°C in a steam chamber and subsequently at 130°C under nitrogen atmosphere. The molecu…
The immiscibility between rhombohedral ${\mathrm{La}}_{5/8}{\mathrm{Sr}}_{3/8}{\mathrm{MnO}}_{3}$ and hexagonal ${\mathrm{LuMnO}}_{3}$ leads to a $\ensuremath{\mu}\mathrm{m}$-scale heterogeneous mixture of half-metallic-ferromagnetic and insulating-ferroelectric phases. Electronic conduction of the mixture exhibits ne…
The dynamics of sorbitol/glycerol mixtures across the entire composition range has been characterized by dielectric relaxation measurements for frequencies between 10 mHz and 10 MHz. We explore the gradual change in the glass transition temperature ( T g ), fragility ( m ), nonexponentiality ( β KWW ), and occurrence…
Abstract Ethylene propylene rubber–clay nanocomposites (EPR–CNs) were prepared by melt‐compounding maleic anhydride modified EPR (EPR‐MA) with organophilic clay, and their properties were examined. Silicate layers of organophilic clay were found to exfoliate and homogeneously disperse into the nanometer level in the n…
Abstract Five new poly(ether imides) have been prepared on reaction with oxydiphthalic anhydride (ODA) with five different diamines: 1,4‐bis( p ‐aminophenoxy‐2′‐trifluoromethyl benzyl) benzene, 4,4′‐bis( p ‐aminophenoxy‐2′‐trifluoromethyl benzyl) benzene, 1,3‐bis( p ‐aminophenoxy‐2′‐trifluoromethyl benzyl) benzene, 2,…
Precise complex permittivity spectra over the frequency range 0.15 GHz </= nu </= 89 GHz are reported for monodisperse (EGn, 1 </= n </= 6) and polydisperse (PEG174, PEG300, PEG400) oligo(ethylene glycol)s at 25 degrees C. Up to about 20 GHz, the relaxation behavior of all samples can be reasonably described with empi…
We have studied the influence of antiferromagnetic ordering on the local dielectric moments of the ${\mathrm{MnO}}_{5}$ and ${\mathrm{LuO}}_{7}$ polyhedra by measuring neutron powder-diffraction patterns of ${\mathrm{LuMnO}}_{3}$ at temperatures near ${T}_{N}.$ We show that the coupling is weak, because the magnetic e…
Broadband dielectric spectroscopy was used to investigate the segmental dynamics and ionic conduction in LiClO4/PVME complexes with Li/O from 0.1/100 to 10/100, at temperatures from Tg to approximately Tg + 80 degrees C. Although no microphase separation is observed via DSC, dielectric experiments reveal two segmental…
Abstract Styrene and acrylic acid were impregnated into a series of polyamide products (nylon1212, nylon1010, nylon66, nylon6) using supercritical CO 2 as the additive‐carrier and substrate‐swelling agent. The impregnation efficiency of low molecular weight additives into substrates is attributed to complicated intera…
Abstract In the presence of dicumyl peroxide, the compatibility of thermal plasticized starch/linear low‐density polyethylene (TPS/LLDPE) blends using maleic anhydride (MAH) as compatibilizer was investigated. The thermal plasticization of starch and its compatibilizing modification with LLDPE was accomplished in a si…