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  • 1
    Electronic Resource
    Electronic Resource
    Preparation-dependent rectification behavior of lead sulfide particulate filmsSupport of this work by a grant from the Department of Energy is gratefully acknowledged. [AMC 119] (1992)
    Weinheim : Wiley-Blackwell
    Advanced Materials 4 (1992), S. 93-97 
    Details
    ISSN: 0935-9648
    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
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/adma.19920040206
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  • 2
    Electronic Resource
    Electronic Resource
    Water-soluble copolymers, XXIII. Copolymers of acrylamide with N-(1,1-dimethyl-3-oxobutyl)-N-(n-propyl)acrylamide: Synthesis and characterization (1986)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 144 (1986), S. 73-86 
    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: Die Copolymerisation von Acrylamid (AM) mit N-(1,1-Dimethyl-3-oxobutyl)-N-(n-propyl)acrylamid (PDAAM) wurde im Bereich von 5 bis 20% PDAAM in der Ausgangsmischung untersucht. Die Copolymerenzusammensetzungen wurden mit Hilfe der Elementaranalyse und der 13C-NMR-Spektroskopie ermittelt. Untersuchungen des Reaktivitätsverhältnisses wurden durchgeführt und der Wert des Produktes r1 r2 zu 2,20 bestimmt. Die Molekulargewichte der Copolymeren sinken mit steigendem PDAAM-Gehalt in der Ausgangsmischung. Die Mikrostruktur der Copolymeren wurde aus den experimentell bestimmten Reaktivitätsverhältnissen ermittelt. Diese Modellstrukturen wurden zur Abschätzung der Beziehung zwischen Struktur und Eigenschaften in verdünnter Lösung verwendet, die in einer nachfolgenden Veröffentlichung vorgestellt wird.
    Notes: The copolymerization of acrylamide (AM) with N-(1,1-dimethyl-3-oxobutyl)-N-(n-propyl)acrylamide (PDAAM) has been studied in the range from 5 to 20% PDAAM in the feed. The copolymer compositions have been determined from elemental analysis and 13C-NMR. Reactivity ratio studies have been performed and the value of r1 r2 determined to be 2.20. The molecular weights of the copolymers were found to decrease with increasing PDAAM content in the feed. The copolymer microstructures were predicted from the experimentally determined reactivity ratios. These model structures are utilized for assessment of structure/dilute solution property relationships reported in a subsequent paper in this series.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1986.051440106
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  • 3
    Electronic Resource
    Electronic Resource
    Water-soluble copolymers, XXIVPart XXIII, cf. lit.3. Copolymers of acrylamide with N-(1,1-dimethyl-3-oxobutyl)-N-(n-propyl)acrylamide: Solution properties (1986)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 144 (1986), S. 87-99 
    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: Lösungseigenschaften von Copolymeren aus Acrylamid (AM) und N-(1,1-Dimethyl-3-oxobutyl)-N-(n-propyl)acrylamid (PDAAM) mit bekanntem Molekulargewicht wurden in Abhängigkeit von der Zusammensetzung, von zugesetzten Elektrolyten und der Polymerkonzentration untersucht. Arrhenius-Untersuchungen wurden mit Hilfe der Viskosimetrie und der NMR-Spektroskopie durchgeführt. Untersuchungen der Phasenseparation wurden mit Hilfe von Trübungstitrationen vorgenommen. Die Lösungseigenschaften der AM-PDAAM-Copolymeren werden durch die Anwesenheit von intramolekularen hydrophoben Wechselwirkungen bestimmt. Diese Wechselwirkungen können zu einer Abnahme der hydrodynamischen Ausdehnungen im Vergleich zu Polyacrylamid mit ähnlichem Molekulargewicht führen.
    Notes: Solution properties of copolymers of acrylamide (AM) with N-(1,1-dimethyl-3-oxobutyl)-N-(n-propyl)acrylamide (PDAAM) of known molecular weight have been studied as a function of composition, added electrolytes, and polymer concentration. Arrhenius-type studies have been performed by viscometry and NMR to assess the effects of temperature. Phase separation studies have also been performed using turbidimetry. The solution properties of the AM-PDAAM copolymers are dictated by the presence of intramolecular hydrophobic interactions. These interactions may result in decreased hydrodynamic dimensions relative to polyacrylamide of similar molecular weight.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1986.051440107
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  • 4
    Electronic Resource
    Electronic Resource
    Molecular weight distribution of polystyrene by sedimentation velocity analysis (1959)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 36 (1959), S. 341-349 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Analysis of sedimentation velocity experiments employing a θ solvent has been applied to measure the molecular weight distribution of both broad- and narrow-distribution polystyrene. The θ solvent was found necessary for satisfactory results. The required sedimentation constant-molecular weight relationship was obtained from both intrinsic viscosity data and molecular weights obtained by Archibald's method.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1959.1203613030
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  • 5
    Electronic Resource
    Electronic Resource
    The effect of molecular weight distribution on the physical properties of polystyrene (1959)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 39 (1959), S. 87-100 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Mechanical properties and melt viscosity have been measured on anionc polystyrene of narrow molecular weight distribution and thermal polystyrene of broad molecular weight distribution in an attempt to study the effect of molecular weight distribution. Tensile strength and elongation were found to depend upon some molecular weight between weight-average and number-average and not on number-average molecular weight alone, as previously reported, while tensile impact strength depends upon weight-average molecular weight, and modulus is essentially independent of molecular weight or molecular weight distribution. There is indication that high shear melt viscosity does not depend upon weight-average molecular weight as does zero shear viscosity due to the effect of molecular weight distribution on non-Newtonian flow characteristics. Complete analysis indicates little chance for a narrowing of the polymer distribution to permit an increased ease of fabrication without detrimental effects on the mechanical properties.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1959.1203913508
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  • 6
    Electronic Resource
    Electronic Resource
    Ceiling temperature of α-methylstyrene (1957)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 25 (1957), S. 488-490 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1957.1202511112
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  • 7
    Electronic Resource
    Electronic Resource
    Molecular weight distribution of anionically polymerized α-methylstyrene (1959)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 41 (1959), S. 327-331 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The molecular weight distribution of anionically polymerized α-methylstyrene has been measured by sedimentation velocity analysis. Molecular weight dependence of sedimentation constants and solution viscosities are reported. It is shown that the molecular weight distribution of poly-α-methylstyrene made by sodium complex is very narrow. Formation of a two-peaked distribution polymer is reported; the data give support to the mechanism of double-ended polymer propagation.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1959.1204113827
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  • 8
    Electronic Resource
    Electronic Resource
    Water-soluble copolymers. IV. Random copolymers of acrylamide with sulfonated comonomers (1982)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 20 (1982), S. 817-838 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Random copolymers of acrylamide with sodium-2-sulfoethyl methacrylate and with sodium-2-acrylamido-2-methylpropane sulfonate were synthesized in aqueous solutions utilizing persulfate initiators. Copolymer compositions were determined by elemental analysis and by infrared spectroscopic methods. Monomer reactivity ratios were calculated using Fineman-Ross, Kelen-Tüdos, and/or Mayo-Lewis techniques at appropriate conversions. The copolymer microstructure, including mean sequence length distributions, was calculated from reactivity ratios. Membrane osmometry and viscometry measurements were utilized to estimate molecular weight and size. The large dimensions of these polyelectrolytes in aqueous solutions, as well as their inherent hydrogen bonding capacity and pseudoplasticity, make these copolymers excellent candidates for application as mobility control agents in enhanced oil recovery.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1982.170200319
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  • 9
    Electronic Resource
    Electronic Resource
    Water-soluble copolymers. III. Dextran-g-poly(acrylamides) control of grafting sites and molecular weight by Ce(IV)-induced initiation in homogeneous solutions (1981)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 19 (1981), S. 2229-2241 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Model graft copolymers were synthesized by grafting acrylamide onto dextran (Mw = 500,000) utilizing an initiation method in which a Ce(IV)/HNO3 solution was added to the dextran solution in order to allow coplexation prior to monomer addition. Three synthetic reaction parameters were optimized on the basis of conversion and solution viscosity: monomer concentration, dextran concentration, and nitric acid concentration. Molar ratios of [Ce(IV)]/[dextran] were changed systematically to affect the number and length of the acrylamide grafts. The number of grafting sites and graft chain lengths, determined by selective hydrolysis of the carbohydrate backbone, were in good agreement with those theortically predicted from knowledge of initiation efficiency and monomer conversion. Rheological studies of the model graft copolymers were conducted in aqueous solutions as a function of temperature, added salt, and copolymer concentration.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1981.170190909
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  • 10
    Electronic Resource
    Electronic Resource
    Water-soluble copolymers. VII. Cerium (IV) induced graft copolymerization of acrylamide and sodium-2-acrylamido-2-methylpropane sulfonate onto dextran (1984)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 22 (1984), S. 49-60 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Studies were conducted on grafting of acrylamide (AM) and sodium-2-acrylamido-2-methylpropane sulfonate (NaAMPS) comonomers onto dextran utilizing Ce(IV) induced initiation. The effects of reaction temperature, the Ce(IV)/dextran ratio, and the AM/NaAMPS ratio on grafting yield were investigated. The graft copolymerization behavior can be explained by exchange of the AMPS anion with one of the ligands on the Ce(IV) initiator. Oxidative modification of the dextran substrate improved the yield of graft copolymer. The dextran-g-poly(acrylamido-co-sodium-2-acrylamido-2-methylpropane sulfonate) samples prepared by this method were characterized as to copolymer composition and molecular weight utilizing elemental analysis, dilute solution viscometry, and aqueous size exclusion chromatography. Relationships of molecular weight and charge density to kinematic viscosity and salt sensitivity are discussed.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1984.170220105
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