Materials Literature
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Abstract Experiments were performed in capillary and slit rheometers to determine the effects of the presence of fluoropolymers at the polymer-wall interface on wall slip and extrudate distortion of a molten high density polyethylene. Two fluoropolymers were used to modify the interface. It was found that one of these…
<div class="htmlview paragraph">A new technique was proposed for the simultaneous measurement of the concentration of fuel vapor and liquid in an evaporating diesel spray injected into a high temperature and high pressure environment. This technique was based on the principle of the absorption of ultraviolet las…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGrowth of silica polymers in a lamellar mesophaseM. Dubois, T. Gulik-Krzywicki, and B. CabaneCite this: Langmuir 1993, 9, 3, 673–680Publication Date (Print):March 1, 1993Publication History Published online1 May 2002Published inissue 1 March 1993https://pubs.acs.org/doi/10.1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOxidation resistant inorganic-porphyrin analog polyoxometalates. 3. Synthesis and x-ray crystallographic characterization of a new heteropolyoxoanion structural type, the diruthenium-oxo-bridged bimetallic inorganic-porphyrin analog KLi15[O{RuIVCl(.alpha.2-P2W17O61)}2].2KCl.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe first surface-attached catenane: self-assembly of a two-component monolayerTianbao Lu, Litao Zhang, George W. Gokel, and Angel E. KaiferCite this: J. Am. Chem. Soc. 1993, 115, 6, 2542–2543Publication Date (Print):March 1, 1993Publication History Published online1 May 200…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSimulation of elastic and plastic response in the glassy polycarbonate of 4,4'-isopropylidenediphenolM. Hutnik, A. S. Argon, and U. W. SuterCite this: Macromolecules 1993, 26, 5, 1097–1108Publication Date (Print):March 1, 1993Publication History Published online1 May 2002Pub…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMixed monolayers formed by the self-assembly on gold of thiol-functionalized anthraquinones and 1-alkanethiolsLitao Zhang, Tianbao Lu, George W. Gokel, and Angel E. KaiferCite this: Langmuir 1993, 9, 3, 786–791Publication Date (Print):March 1, 1993Publication History Publish…
The photophysical properties of 3,3'-dialkylthiacarbocyanine iodides and chlorides were measured in various solvents. It was found that photoisomerization and fluorescence are the major contributors to the deactivation of the excited singlet state; intersystem crossing occurs with only a very low efficiency. In ethano…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNew effective catalysts for Mukaiyama-aldol and -Michael reactions: bismuth trichloride-metallic iodide systemsChristophe Le Roux, Hafida Gaspard-Iloughmane, Jacques Dubac, Joel Jaud, and Pierre VignauxCite this: J. Org. Chem. 1993, 58, 7, 1835–1839Publication Date (Print):M…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDependence of the OBDD morphology on diblock copolymer molecular weight in copolymer/homopolymer blendsRichard J. Spontak, Steven D. Smith, and Arman AshrafCite this: Macromolecules 1993, 26, 5, 956–962Publication Date (Print):March 1, 1993Publication History Published onlin…
Based on experimental and modeling studies, the rate of increase in the martensite start temperature M s for the tetragonal‐to‐monoclinic transformation with increase in zirconia grain size is found to rise with decrease in ZrO 2 content in the zirconia‐toughened alumina ZTA system. The observed grain size dependence…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTVisible absorption and photocurrent spectra of epitaxially deposited phthalocyanine thin films: interpretation of exciton coupling effectsLai Kwan Chau, Craig D. England, Siying Chen, and Neal R. ArmstrongCite this: J. Phys. Chem. 1993, 97, 11, 2699–2706Publication Date (Pri…
Films of polytetrafluoroethylene (PTFE) were deposited by laser ablation using the fourth harmonic, at 266 nm, of a Nd-YAG laser. The films are found to be stoichiometric with the correct optical properties. We suggest that UV absorption onsets the pyrolitic decomposition of PTFE leading to a monomer that subsequently…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTColloidal dispersions of surfactant-stabilized polypyrrole particlesC. DeArmitt and S. P. ArmesCite this: Langmuir 1993, 9, 3, 652–654Publication Date (Print):March 1, 1993Publication History Published online1 May 2002Published inissue 1 March 1993https://pubs.acs.org/doi/10…
Relatively low concentrations of randomly substituted off-center ions are known to induce ferroelectric order in highly polarizable crystals. In the case of potassium tantalate (${\mathrm{KTaO}}_{3}$) doped with lithium or niobium, the results of first-order Raman scattering from two hard phonon modes (${\mathrm{TO}}_…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetic and mechanistic investigations of the formation of polyimides under homogeneous conditionsY. J. Kim, T. E. Glass, G. D. Lyle, and J. E. McGrathCite this: Macromolecules 1993, 26, 6, 1344–1358Publication Date (Print):March 1, 1993Publication History Published online1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMetal oligo-yne polymers: electronic structures of [-(L)nMC.tplbond.CRC.tplbond.C-]x polymersGilles Frapper and Miklos KerteszCite this: Inorg. Chem. 1993, 32, 5, 732–740Publication Date (Print):March 1, 1993Publication History Published online1 May 2002Published inissue 1 M…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLong-range attraction between a hydrophobic surface and a polar surface is stronger than that between two hydrophobic surfacesYi Hua Tsao, D. Fennell Evans, and Haakan WennerstroemCite this: Langmuir 1993, 9, 3, 779–785Publication Date (Print):March 1, 1993Publication Histor…
Abstract It is well known that illite-smectite can form from smectite at elevated temperatures in natural and experimental systems. However, the conversion of smectite to illite-smectite is also found in some natural systems that have never been heated. The present experiments show that illite layers can form from sme…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCorrelation of x-ray crystallographic data and spectroscopic properties of divalent metal complexes of octaethylporphyrinK. D. Stanley, L. Luo, R. Lopez de la Vega, and J. M. E. QuirkeCite this: Inorg. Chem. 1993, 32, 7, 1233–1236Publication Date (Print):March 1, 1993Publica…