Materials Literature
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In this paper we describe the preparation and preliminary characterization of diblock copolymers with a low surface energy block. These polymers were prepared by modifying the isoprene block in styreneisoprene-based block copolymers with either short perfluoroalkyl or dimethyl siloxy ‘fingers’. Specifically, the dien…
Phase development during reaction hot pressing of α‐Si 3 N 4 , AlN, Al 2 O 3 , and M 2 O Z powder mixtures (M = Li, Mg, Ca, Y, Nd, Sm, Gd, Dy, Er, and Yb) forming α′‐SiAlON has been studied. The wetting behavior of the ternary eutectic melt of M 2 O z ‐Al 2 O 3 ‐SiO 2 was found to control the reaction sequence during…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEPR and NMR Spectra as Probes of Spin-Density Distributions in Heterocyclic Ligands Coordinated in trans-[L(Im)(NH3)4RuIII]: Crystal Structure of trans-[(Im)2(NH3)4Ru]Cl3.cntdot.H2OK. J. LaChance-Galang, P. Doan, M. J. Clarke, U. Rao, A. Yamano, and B. M. HoffmanCite this: J…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTBN Alternants: Boron Nitride Cages and PolymersH.Y. Zhu, D. J. Klein, W. A. Seitz, and N. H. MarchCite this: Inorg. Chem. 1995, 34, 6, 1377–1383Publication Date (Print):March 1, 1995Publication History Published online1 May 2002Published inissue 1 March 1995https://pubs.acs.…
Reaction of diarylcadmium or diarylzinc reagents with 1,2-dideoxy-3,5-di-O-p-toluoyl-1-chloro-α-D-ribofuranose affords 3,5-di-O-protected aromatic C-nucleosides in good yields.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThree Phases of [Fe(C5Me5)2]+[TCNQ]-: Ferromagnetism in a New Structural PhaseWilliam E. Broderick, David M. Eichhorn, Xiaohua Liu, Paul M. Toscano, Scott M. Owens, and Brian M. HoffmanCite this: J. Am. Chem. Soc. 1995, 117, 12, 3641–3642Publication Date (Print):March 1, 199…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMicroscopic Solubility-Parameter Theory of Polymer Blends: General PredictionsKenneth S. Schweizer and Chandralekha SinghCite this: Macromolecules 1995, 28, 6, 2063–2080Publication Date (Print):March 1, 1995Publication History Published online1 May 2002Published inissue 1 Ma…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTResonance Raman, CARS, and Picosecond Absorption Spectroscopy of Copper Porphyrins: The Evidence for the Exciplex Formation with Oxygen-Containing Solvent MoleculesSergei G. Kruglik, Pavel A. Apanasevich, Vladimir S. Chirvony, Vladimir V. Kvach, and Valentin A. OrlovichCite…
Abstract A new class of polyanhydrides synthesized from nonlinear hydrophobic fatty acid esters, based on ricinoleic, maleic acid, and sebacic acid, possessed desired physico‐chemical and mechanical properties for use as drug carriers. The polymers were synthesized by melt condensation to yield film‐forming polymers w…
The primary metallization technique in the semiconductor industry for the past decade has been magnetron sputtering. The general industry trend towards damascene processing requires the capability to fill trenches and vias with sub-one-half micron widths and aspect ratios (AR) as high as 3:1. At these dimensions and g…
Abstract The thermal reaction between N ‐phenylmaleimide and 2‐allylphenol was taken as a model reaction in order to obtain information about chain extension and crosslinking mechanisms of the thermal curing of bismaleimides with diallylbisphenol A. Isolation (preparative HPLC) and characterization ( 1 H and 13 C NMR,…
We present here a short summary of two rather different, but complementary, simulations of plastic deformation in a flexible chain glassy polymer. In the first, atomistic simulation, a molecular structure model is used in which well‐established force fields between atoms and atom groups on a typical chain polymer are…
Abstract Compatibilization of blends of linear low‐density polyethylene (LLDPE) and polystyrene (PS) with block copolymers of styrene (S) and butadiene (B) or hydrogenated butadiene (EB) has been studied. The morphology of the LLDPE/PS (50/50) composition typically with 5% copolymer was characterized primarily by scan…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIn Situ EXAFS Study of the Photocatalytic Reduction and Deposition of Gold on Colloidal TitaniaA. Fernandez, A. Caballero, A. R. Gonzalez-Elipe, J.-M. Herrmann, H. Dexpert, and F. VillainCite this: J. Phys. Chem. 1995, 99, 10, 3303–3309Publication Date (Print):March 1, 1995P…
Cyclic fatigue growth rates in R‐curve ceramics have been observed to depend very strongly on the maximum applied stress intensity, K max , and only weakly on the stress intensity range, Δ This behavior is rationalized through measurement of crack wake shielding characteristics as a function of these fatigue parameter…
The effective sintering rates and viscosities of three‐dimensional composite packings have been studied using a discrete numerical model. The packings consist of random mixtures of hard and soft spheres of the same size. With increasing substitution of hard particles for soft particles in the packing, the viscosity in…
We consider spatially discrete nonlinear diffusion equations that are similar in form to the Cahn-Hilliard and Cahn-Allen equations.Since these equations are spatially discrete, solutions exist even for negative gradient energy coefficients.In order to study these equations analytically on finite subsets of one, two a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEnzymic Mediated Synthesis of Conjugated Polymers at the Langmuir Trough Air-Water InterfaceFerdinando F. Bruno, Joseph A. Akkara, Lynne A. Samuelson, David L. Kaplan, Braja K. Mandal, Kenneth A. Marx, Jayant Kumar, and Sukant K. TripathyCite this: Langmuir 1995, 11, 3, 889–…
In a decagonal quasicrystal with composition AI70Co15Ni15 two different types of superstructure have been found by electron microscopy techniques. One of these superstructures has previously been observed. The other newly characterized superstructure causes a ring-like zone of low diffraction intensities and, addition…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSequence-Specific Photocleavage of DNA by an Expanded Porphyrin with Irradiation above 700 nmDarren Magda, Meredith Wright, Richard A. Miller, Jonathan L. Sessler, and Petra I. SansomCite this: J. Am. Chem. Soc. 1995, 117, 12, 3629–3630Publication Date (Print):March 1, 1995P…