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  • 1
    Electronic Resource
    Electronic Resource
    Effects of the addition of a liquid crystalline copolyester to polystyrenes on blending torque and mechanical properties of blends (1993)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 48 (1993), S. 383-391 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Blending of polystyrenes (PS) with a thermotropic liquid crystalline polymer (LCP) was performed by using a continuous corotating twin screw extruder. The influence of LCP content on the blending process was studied by changing the barrel heater temperature and the screw speed. The torque of screw shafts, generated during the blending process, was influenced by LCP content and its influence was not simple. The torque generated during the blending process was not directly related to the apparent melt viscosity of blends. Further, the effects of the matrix viscosity on the morphology and mechanical properties of the PS/LCP blends were studied using three grades of PS as matrix resins. It was found that the size of the LCP dispersed phase decreased with increasing matrix viscosity. Consequently, the mechanical properties of the PS/LCP blend were improved. © 1993 John Wiley & Sons, Inc.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1993.070480302
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  • 2
    Electronic Resource
    Electronic Resource
    167. Simulation turbulenter Gas/Feststoff-Strömungen mit hohem Feststoffvolumenanteil (1994)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 66 (1994), S. 1260-1260 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.3306609168
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  • 3
    Electronic Resource
    Electronic Resource
    Selective adsorption of bilirubin by macroporous poly(glycidyl methacrylate-co-divinylbenzene) beads (1996)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 237 (1996), S. 143-161 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Makroporöse Glycidylmethacrylat(GMA)-Divinylbenzol(DVB)-Copolymerstränge wurden synthetisiert, und die Adsorption von Bilirubin, Albumin und anderen Serumkomponenten wurde untersucht. Die aus DVB/GMA im Gewichtsverhältnis 75/25 aufgebauten Stränge bieten eine hervorragende Bilirubin-Adsorptionsfähigkeit. Wenn die Oberfläche der Stränge vorher mit Albumin beschichtet wurde, wird selektive Adsorption von Bilirubin erzielt, und die Adsorption von Albumin im Serum wird unterdrückt. Außerdem wurde durch Vernetzung des beschichteten Albumins mit Glutaraldehyd die hervorragende Bilirubin-Adsorptionsfähigkeit bewahrt und eine zusätzliche Adsorption von Albumin aus dem Serum erzielt.
    Notes: Macroporous glycidyl methacrylate (GMA)-divinylbenzene (DVB) copolymer beads have been synthesized and the adsorption of bilirubin, albumin and other serum components were studied. The beads composed of DVB/GMA in the weight ratio of 75/25 provide an excellent bilirubin adsorption ability. When the surface of the beads was previously coated with albumin, discriminating adsorption of the bilirubin in the serum was attained and the adsorption of albumin was depressed. In addition, when the coated albumin was crosslinked with glutaraldehyde, the excellent bilirubin adsorption ability was maintained, however, an adsorption of albumin from the serum occurred.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1996.052370108
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  • 4
    Electronic Resource
    Electronic Resource
    Measurement of tetrad configurations in poly(methyl acrylate) by 300 MHz PMR spectroscopy (1974)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Letters Edition 12 (1974), S. 635-640 
    Details
    ISSN: 0360-6384
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1974.130121105
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  • 5
    Electronic Resource
    Electronic Resource
    Cationic polymerization α,β-disubstituted olefins. Part I. Cationic copolymerization of β-methylstyrenes (1965)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A: General Papers 3 (1965), S. 2567-2578 
    Details
    ISSN: 0449-2951
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Steric and electronic effects of the β-methyl group on monomer reactivity have been studied by copolymerization of styrenes and β-methylstyrenes. Steric hindrance of the β-methyl group in the transition state of homopolymerization is so great that the rate of the propagation reaction is considered to be depressed by as much as 1/10-1/20 of the corresponding styrene derivatives. In contrast to this, steric hindrance of the β-methyl group in cross propagation reactions with styrene is found to be very small. The monomer reactivity itself of β-methylstyrenes is a little lower than that of corresponding styrenes. This lowered reactivity of β-methylstyrenes is considered to be due to the electronic effect of the β-methyl group.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1965.100030714
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  • 6
    Electronic Resource
    Electronic Resource
    Cationic polymerization of cyclic olefins (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-1: Polymer Chemistry 4 (1966), S. 869-879 
    Details
    ISSN: 0449-296X
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The polymerization and the polymerizabilities of indene, benzofuran, and 1,2-dihydronaphthalene are discussed from the point of view of ring strain, ring stabilization, and steric hindrance in the transition state. Monomer reactivities of these olefins were estimated from copolymerization with styrene and from the rate of addition of iodine bromide in acetic acid. Rates and degrees of polymerization are compared with monomer reactivities and resonance energies of indene, 1,2-dihydronaphthalene, and benzofuran as a measure of ring strain and stabilization. It is found that indence is 1.5-2.0 times more reactive than styrene. This high reactivity of indene is attributed to the ring strain in the monomer state and to the low amount of steric hindrance in the transition state of the coplanar five-membered cyclic olefin. 1,2-Dihydronaphthalene is strained and therefore reactive, but propagation to higher molecular weight products is impeded due to the steric hindrance. The reactivity of benzofuran is decreased by conjugative stabilization of C=C double bonds at the reaction site.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.150040413
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