Materials Literature
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Abstract This article presents study of melt rheological properties of composites of polypropylene ( i ‐PP) filled with wood flour (WF), at filler concentrations of 3–20 wt%. Results illustrate the effects of (i) filler concentration and (ii) shear stress or shear rates on melt viscosity and melt elasticity properties…
Abstract Sorption and dilation in the system poly(ethyl methacrylate) (PEMA) and carbon dioxide are reported for pressures up to 50 atm over the temperature range 15–85°C. The sorption isotherms were obtained gravimetrically. The dilation accompanying sorption was measured directly with a cathetometer. At low temperat…
ABSTRACT For a linearly increasing temperature, a differential kinetic model is presented for the determination of kinetic parameters, i.e. activation energy, frequency factor, and reaction order. The performance of this method is illustrated by using two well known chemical reactions: acid‐catalyzed sucrose hydrolysi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMiscibility of polymethacrylate/poly(vinyl chloride) blendsJerome F. Parmer, L. Charles Dickinson, J. C. W. Chien, and Roger S. PorterCite this: Macromolecules 1989, 22, 3, 1078–1083Publication Date (Print):March 1, 1989Publication History Published online1 May 2002Published…
We realized a surface stabilized ferroelectric liquid crystal display with high contrast ratio and high transmittance using a conventional rubbing method. Such remarkable electrooptical properties are based on the switching between uniform states in a cell treated with an AC electric field in the SmC * . It was confir…
A careful study of the metamagnetic transition in single-crystalline ${\mathrm{La}}_{2}$${\mathrm{CuO}}_{4}$ is presented. From magnetic susceptibility measurements the critical exponent (\ensuremath{\beta}) of the weak ferromagnetic state, which terminates at a triple point, has been estimated to be \ensuremath{\beta…
Research Article| March 01, 1989 Aragonite-calcite transformation based on Pennsylvanian molluscs UWE BRAND UWE BRAND 1Department of Geological Sciences, Brock University, St. Catharines, Ontario, Canada L2S 3A1 Search for other works by this author on: GSW Google Scholar GSA Bulletin (1989) 101 (3): 377–390. https://…
High-resolution heat capacity measurements have been made on six mixtures of 40.8 and 60.8, the butyl and hexyl homologs of alkoxybenzylidene octylaniline. The nematic (N)--smectic-A (Sm-A) transition becomes tricritical close to X=0.35, where X is the mole fraction of 60.8. The ${C}_{p}$ data for a mixture with X=0.3…
The degradation reaction kinetics of oxidized polyaniline has been studied employing rotating ring‐disk electrode techniques. Polyaniline films were grown on the disk electrode and were then oxidized at a potential more positive than 0.90V vs. Ag / AgCl , while the degradation product (benzoquinone) was monitored at t…
Perfluorodecyl decane, F(CF2)10(CH2)10H, is shown to undergo a liquid crystal-liquid crystal transition above room temperature. The accompanying reversible structural reorganization is observed by transmitted polarized light microscopy, small angle x-ray scattering and wide angle x-ray diffraction. Both liquid crystal…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe sonochemistry of zinc powderKenneth S. Suslick and Stephen J. DoktyczCite this: J. Am. Chem. Soc. 1989, 111, 6, 2342–2344Publication Date (Print):March 1, 1989Publication History Published online1 May 2002Published inissue 1 March 1989https://pubs.acs.org/doi/10.1021/ja0…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRuffling of nickel(II) octaethylporphyrin in solutionR. G. Alden, B. A. Crawford, R. Doolen, M. R. Ondrias, and J. A. ShelnuttCite this: J. Am. Chem. Soc. 1989, 111, 6, 2070–2072Publication Date (Print):March 1, 1989Publication History Published online1 May 2002Published ini…
A novel liquid-crystalline polyurethane (LCPU) was synthesized by the condensation of2,4-toluenediisocyanate and 4,4'-bis(6-hydroxyhexoxy)biphenyl. Solution polymerization in dimethylformamideproduced intrinsic viscosities in the range 0.30-0.57 dL/g. Differential scanning calorimetry shows a crystallinemelting transi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBand textures in mesomorphic (hydroxypropyl) cellulose solutionsBenoit Ernst and Patrick NavardCite this: Macromolecules 1989, 22, 3, 1419–1422Publication Date (Print):March 1, 1989Publication History Published online1 May 2002Published inissue 1 March 1989https://pubs.acs.o…
The low‐temperature sintering of lead‐based piezoelectric ceramics has been studied. The sintering temperature of lead zirconate titanate (PZT) ceramics could be reduced from ∼ 1250° to ∼960°C by the addition of a small amount of the lower‐melting frit, B 2 O 3 –Bi 2 O 3 —CdO. It exhibited the following dielectric and…
Plane strain compression of a rectangular block is used as a model problem to investigate the dynamics of shear band development from an internal inhomogeneity. The material is characterized as a von Mises elastic-viscoplastic solid, with a hardness function that exhibits a local maximum. Regardless of whether the mat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFluorescence study of aluminosilicate sols and gels doped with hydroxy trisulfonated pyreneJ. C. Pouxviel, B. Dunn, and J. I. ZinkCite this: J. Phys. Chem. 1989, 93, 5, 2134–2139Publication Date (Print):March 1, 1989Publication History Published online1 May 2002Published ini…
Abstract The present investigation deals with the tensile mechanical properties of the melt‐blended polyethylene/polystyrene pair as controlled by poly(hydrogenated butadiene‐ b ‐styrene) copolymers. It is clearly demonstrated that moderate amounts of these copolymers (2–10%) significantly increase both the ultimate s…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNew phase of an oxygen-nitrogen alloy at high pressure and room temperature detected by Raman spectroscopyBruce J. Baer and Malcolm NicolCite this: J. Phys. Chem. 1989, 93, 5, 1683–1687Publication Date (Print):March 1, 1989Publication History Published online1 May 2002Publis…
Abstract Preparation of the μ-cyano dinuclear complexes MI[F(en or tn)2Cr(NC)Cr(CN)5]·nH2O from the double complexes MI[CrF(H2O)(en or tn)2][Cr(CN)6]·nH2O was carried out both in the solid state and in solution, where MI is Li+, Na+, K+, or Rb+ ion; en and tn stand for 1,2-ethanediamine and 1,3-propanediamine, respect…