Materials Literature
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Abstract Differential scanning calorimeter (DSC) and polarized optical microscopy (POM) have been used to investigate the isothermal and nonisothermal crystallization behavior of poly(ε‐caprolactone) (PCL)/multi‐walled carbon nanotube (MWNT) composites. PCL/MWNT composites have been prepared by mixing the PCL polymer…
Abstract Composites with good mechanical properties were prepared from chemically modified soy oils and biofibers without additional petroleum‐based polymers. These composites were prepared from maleic anhydride and epoxide functionalized soybean oils that were cured in the presence of various biofibers (e.g., kenaf,…
Abstract Nylon 11 (PA11)/clay nanocomposites have been prepared by melt‐blending, followed by melt‐extrusion through a capillary. Transmission electron microscopy shows that the exfoliated clay morphology is dominant for low nanofiller content, while the intercalated one is prevailing for high filler loading. Melt rhe…
Abstract An approach of using slowly crystallizing polymers to form single‐polymer composites (SPCs) was investigated. The method was demonstrated using poly(ethylene terephthalate) (PET) as a model system, with which two distinct physical forms, namely, amorphous PET films and highly crystalline PET fibers can be rea…
Abstract Supramolecular nanotube hosts with precisely controlled inner or outer diameters have been synthesized by self‐assembly of unsymmetrical bolaamphiphilic monomers or glucopyranosylamide lipids, respectively. Time‐resolved fluorescent measurement using 8‐anilinonaphthalene‐1‐sulfonate (ANS) as a probe revealed…
We have developed facile, versatile prepolymerization and postpolymerization functionalization approaches to prepare well-defined fluorescent conjugated fluorene-based glycopolymers (polymers A and B) through thioether formation. Well-defined glucose-carrying monomer (5) and conjugated polymer (polymer 2) were prepare…
Abstract The spin‐crossover properties of lipophilic, supramolecular Fe(II) complexes bridged by 4‐(3‐dodecyloxy)propyl‐1,2,4‐triazole [Fe(II)( 1 ) 3 Cl 2 ] were investigated in chloroform and cast films. A purple low‐spin (LS) complex in a powdery form was transformed into pale yellow high‐spin (HS) polymers by disso…
Abstract Recycled poly(ethylene terephthalate) from waste bottles (hereafter, rPET) was used as an reinforcing material for isotactic polypropylene (iPP) based on the concept of in situ microfibrillar‐reinforced composites (iMFCs). Microfibers of rPET were successfully generated during melt‐extrusion and subsequent dr…
Abstract This research focuses on the need for interfacial engineering at the carbon nanotube/polymer composite interface in the effort to obtain enhanced mechanical properties. The mechanical properties of multiwall carbon nanotubes (MWNTs)/poly (methyl methacrylate) (PMMA) nanocomposites were studied as a function o…
The properties of thermally reversible organogels in which the gelators consist of a phosphonic acid monoester, phosphonic acid, or phosphoric acid monoester and a ferric salt are probed by IR and NMR spectroscopies, optical microscopy, X-ray diffraction, rheology, and light and small-angle neutron scattering (SANS) t…
An amphiphilic comb-dendritic block copolymer was designed and synthesized based on poly (γ- n -dodecyl- l -glutamate) as a hydrophobic comb block and a hydrophilic polyester dendron block modified with poly(ethylene glycol); the high persistence length of the rodlike helical polypeptide backbone within the comb block…
This Letter describes a method to generate nanometer scale patterns on insulating substrates and wide band gap materials using critical energy electron beam lithography. By operating at the critical energy (E2) where a charge balance between incoming and outgoing electrons leaves the surface neutral, charge-induced pa…
Abstract By using sol–gel method, amorphous titania was introduced into epoxy matrix to prepare a series of high refractive index TiO 2 /epoxy resin nanocomposite films. To increase the refractive index of the hybrid films, triethoxysilane‐capped trimercaptothioethylamine (TCTMTEA), a new kind of high refractive index…
The association and resulting fluorescence quenching of CdSe quantum dots by 4-amino-2,2,6,6-tetramethylpiperidine oxide (4-amino-TEMPO), a persistent nitroxide, have been examined using electron paramagnetic resonance (EPR) and fluorescence spectroscopy. EPR data suggest binding constants around (8 +/- 4) x 10(6) M(-…
The coating of BaTiO 3 particles with a different perovskite and the subsequent consolidation to dense ceramics retaining a radial composition gradient within the single grains are presented and discussed. A shell of SrTiO 3 or BaZrO 3 was directly grown on the surface of BaTiO 3 spherical templates suspended in aqueo…
Multicomponent and multifunctional hybrid structures based on microsized carbon fibers sheathed with aligned carbon nanotubes and their derivatives have been successfully prepared, and have been demonstrated to be an effective means for connecting nanoscale entities to the outside world and to possess interesting elec…
The synthesis and characterization of [FeII(trim)2]Cl2 (2), [FeII(trim)2]Br2MeOH (3), and [FeII(trim)2]I2MeOH (4), including the X-ray crystal structure determinations of 2 (50 and 293 K) and 4 (293 K), have been performed and their properties have been examined. In agreement with the magnetic susceptibility results,…
Upon inclusion complexation with a racemic mixture of chiral fullerene C76 ((+/-)-C76), a novel cyclic host (1Rh) composed of a chiral N-methylporphyrin (PNMe) and a methylrhodium porphyrin (PRh) exhibited at 20 degrees C a 1H NMR spectral profile with diastereoisomerically split signals due to the NH group of PNMe. I…
Abstract The fluorescent, magnetic, and conductive properties of nanoparticles can transform polymer‐based materials into composites with higher levels of sophistication than found in polymers alone. The ligand chemistry of nanoparticles is critically important in the development of polymer–nanoparticle composites to…
Novel hyperbranched 2D gearlike single-crystal silver nanocrystals and their self-organized 3D structures have been successfully prepared in aqueous solution at room temperature. An interesting shape evolution from hyperbranched nanocrystals to quasi-spherical or disklike nanocrystals was observed.