Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCyclopolymerization of divinyl ethers. Synthesis and the cation-binding property of poly(crown ethers)Toyoji Kakuchi, Osamu Haba, and Kazuaki YokotaCite this: Macromolecules 1992, 25, 19, 4854–4858Publication Date (Print):September 1, 1992Publication History Published online…
Abstract Dynamic mechanical and gas transport properties for homogeneous homopolymer blends and random copolymers of bisphenol‐A and tetramethyl bisphenol‐A polycarbonates (PC‐TMPC) were determined. The gas transport measurements were performed at 35°C for the gases He, H 2 , O 2 , Ar, N 2 , CH 4 , and CO 2 . The resu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTGeometrical and electronic structures of a benzimidazobenzophenanthroline-type ladder polymer (BBL)Sung Y. Hong, Miklos Kertesz, Yong S. Lee, and Oh Kil KimCite this: Macromolecules 1992, 25, 20, 5424–5429Publication Date (Print):September 1, 1992Publication History Publishe…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of poly(2,5-dialkoxyphenylene)Mitsuru Ueda, Tetsuya Abe, and Hiroshi AwanoCite this: Macromolecules 1992, 25, 20, 5125–5130Publication Date (Print):September 1, 1992Publication History Published online1 May 2002Published inissue 1 September 1992https://pubs.acs.org…
Commercial β‐SiAlON ceramics were joined using mixed Si 3 N 4 , Y 2 O 3 , Al 2 O 3 , and SiO 2 powders. At a joining temperature of 1600°C and a hold time in excess of 10 min, the adhesive was converted to an approximate 60:40 vol% composite of β‐SiAlON–glass‐ceramic. The grain size of the acicular β‐SiAlON grains pre…
A new etching system of tetramethyl ammonium hydroxide-2-propanol (TMAH-IPA) is suggested. The undercutting ratio for TMAH at 80 degrees C is about 7, much higher than for KOH etchants. The addition of IPA in the TMAH system maintains the main features of TMAH and reduces the undercutting ratio by a factor of 2-3.
An ongoing challenge for future developments in high‐performance ceramic multilayer capacitors and integrated ceramics is to reduce the internal electrode cost and thickness without sacrificing yield or reliability. Key to these developments is a thorough understanding of the interactions which occur between flux‐sint…
Birefringence patterns of nematic liquid crystalline droplets are investigated both theoretically and experimentally. Gridding method is developed to calculate optical birefringence patterns of nematic droplets with different director configurations. Series of birefringence patterns of the four typical nematic droplet…
Abstract The texture, mineralogy, and to a lesser extent topography, of some sandy soils in Michigan were examined to determine the possible genesis of lamellae in these soils. Differences in lamellae presence and depth were studied in four Haplorthods, one Argic Udipsamments, and one Psammentic Eutroboralf on a subtl…
The X-ray structure of the C30V/C51A disulfide mutant of basic pancreatic trypsin inhibitor (BPTI) has been analyzed at 1.6 A resolution. The mutant crystallizes in a cell having two molecules in the asymmetric unit. The packing environments of these two molecules are quite different, allowing for an assessment of whi…
For a binary mixture we relate the second order expansion of the grand canonical potential Ω to direct correlation functions and to thermodynamic expressions. The matrix of second functional derivatives of Ω with respect to the particle density fluctuations is diagonalized. The zero of the smallest eigenvalue indicate…
The NAD(+)-dependent isocitrate dehydrogenase from etiolated pea (Pisum sativum L.) mitochondria was purified more than 200-fold by dye-ligand binding on Matrix Gel Blue A and gel filtration on Superose 6. The enzyme was stabilized during purification by the inclusion of 20% glycerol. In crude matrix extracts, the enz…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNew triborate-pillared hydrotalcitesAlak Bhattacharyya and Daniel B. HallCite this: Inorg. Chem. 1992, 31, 18, 3869–3870Publication Date (Print):September 1, 1992Publication History Published online1 May 2002Published inissue 1 September 1992https://pubs.acs.org/doi/10.1021/ic00…
The decomposition process of tetraethylorthosilicate (TEOS) and ozone at atmospheric pressure was measured in a closed vessel by in-situ Fourier-transform infrared absorption (FT-IR) analysis, and the changes of the deposition rate and the overall sticking probability β of the film precursor were obtained along the fl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTp-tert-Butylcalix[6]arene symmetrically tetrasubstituted with pyridine pendant groups: synthesis, x-ray crystal structure, and conformational analysis by dynamic NMR spectroscopy and molecular mechanics calculationsPlacido Neri, Mario Foti, George Ferguson, John F. Gallagher…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotoinitiated crosslinking of low-density polyethylene. 6. Spin-trapping ESR studies on radical intermediatesBaojun Qu, Yunhua Xu, Wenfang Shi, and Bengt RaanbyCite this: Macromolecules 1992, 25, 20, 5215–5219Publication Date (Print):September 1, 1992Publication History Pub…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and characterization of tantalum(V) dicarbollide complexesRoger Uhrhammer, Donna J. Crowther, Jeffrey D. Olson, Dale C. Swenson, and Richard F. JordanCite this: Organometallics 1992, 11, 9, 3098–3104Publication Date (Print):September 1, 1992Publication History Publ…
Abstract In this work we have studied the interface reactions during e‐beam evaporation of yttria‐stabilized zirconia (YSZ), yttria (Y 2 O 3 ) and Y on Si(100) substrates by means of x‐ray photoelectron spectroscopy (XPS). A deposition process was developed for the heteroepitaxial growth of YSZ and Y 2 O 3 . A high am…
Small magnetic particles of iron embedded in an insulating alumina matrix have been prepared by ball milling, either by direct milling of a mixture of iron and alumina powders or indirectly by ball-milling enhanced displacement reaction between magnetite and aluminum metal. The average particle size could be reduced t…
The Mo-substituted Nd(Fe,Mo)/sub 12/N/sub x/ compounds are investigated. The ThMn/sub 12/ crystal structure has been obtained for the RFe/sub 11/Mo composition by optimizing the solution treatment temperature, and the magnetic properties of RFe/sub 11/MoN/sub x/ have been measured. The NdFe/sub 11/MoN/sub x/ shows lar…