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  • Polymer and Materials Science  (30)
  • 1985-1989  (25)
  • 1960-1964  (5)
  • 1920-1924
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 132 (1985), S. 169-185 
    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: Polyoxyethylendiglykolsäuren (PEO-Säuren) mit zahlenmittleren Molekularge-wichten von Mn = 8 400 (Ia), 3 300 (Ic) wurden als anti-elektrostatische Materialien for Nylon-6 (Ny6)-Fasern benutzt. Die 2 und 5 Gew.-% der PEO-Säuren enthaltenden Mischfasern wurden stufenweise aus der Schmelze der Mischung bei 260°C versponnen. Die Verarbeitbarkeit der [as-spun] Filamente bezüglich Spinnen und Ziehen war etwas schlechter als die der Ny6-Kontrollfasern. Während des Spinnvorgangs kam es zur Blockkondensation von I und Ny6 durch Reaktion der jeweiligen Endgruppen. Die erhaltenen Blockcopolymeren waren in der Filamentmatrix in Form grob verteilter kugelförmiger Partikel enthalten, die Inselstrukturen bildeten. Die Fasern zeigten gute antistatische Eigenschaften. Ihre Leistungen sanken in der Reihenfolge la 〉 Ib 〉 Ic, was parallel zur Größe, nicht zur Zahl der Inselstrukturen war. Die Festigkeit der Fasern mit 2 Gew.-% Ia und Ib war mit denen der Kontrollfaser vergleichbar. Die an Geweben aus diesen Fasern untersuchte Färbbarkeit wurde kaum beeinflußt. Außerdem zeigte sich, daß die antistatischen Eigenschaften auch beim Färben und den darauf folgenden wiederholten Waschvorgängen nicht verlorengingen. Der Grund dafür ist, daß I durch die oben erwähnte Kondensationsreaktion kovalent and die Ny6-Fasermatrix gebunden vorliegt.
    Notes: Poly(oxyethylene) diglycolic acids (PEO acids) with average molecular weights of Mn = 8 400 (Ia), 3 300 (Ib), and 1 000 (Ic) were used as blending anti-electrostatic agents for nylon 6 (Ny6) fibres. The blended fibres containing 2.0 and 5.0 wt.-% of the PEO acids were successfully spun by the melt-blend spinning process at 260°C. Processabilities of the spinning and the drawing of the as-spun filaments were little deteriorated compared with those of the Ny6 control. During the spinning block condensation of I and Ny6 occurred by reaction of their mutual end-groups. The block copolymers produced were distributed in the filament matrix as coarsely dispersed spheres to form sea-island structures. These fibres showed good antistatic properties; their performances were in the order of Ia 〉 Ib 〉 Ic, which was parallel to the size, not the number, of the islands. The tensile properties of the fibres containing 2.0 wt.-% of Ia and Ib were comparable with those of the control. The dyeabilities examined for their knits were not seriously affected, either. In addition, it was indicated that the performance of antistatic property was not lost at all after the dyeing and the subsequent repeated washings. This is because I is anchored covalently to the Ny6 fibre matrix by the condensation above.
    Additional Material: 3 Ill.
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 138 (1986), S. 151-158 
    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 Permeabilität von Alkalichloriden durch geladene Cellulosemembranen wurde bestimmt. Die geladenen Membranen wurden aus teilweise carboxymethylierter und carboxyethylierter Cellulose mit verschiedenen Substitutionsgraden hergestellt. Die Reihenfolge der Permeabilität wurde zu LiCl 〈 NaCl 〈 CsCl 〈 KCl bestimmt und auf die Verteilung und die Hydratation der Ionen zurückgeführt. Die Konzentrationsabhängigkeit der Permeabilität wurde durch die Teorell-Meyer-Sievers (TMS)-Theorie interpretiert. Die Effektivität der geladenen Gruppen in den Membranen wird durch die Bindung an das Gegenion erklärt.
    Notes: The permeation of alkali chlorides through charged cellulosic membranes was investigated. The membranes used were partially carboxymethylated and carboxyethylated cellulose with various degrees of substitution. The permeability coefficients were found to increase in a sequence of LiCl 〈 NaCl 〈 CsCl 〈 KCl. This sequence is explained by considering the partition and the hydration of the ions in these hydrophilic membranes. The dependence of the permeability on the salt concentration was interpreted by means of Teorell-Meyer-Sievers (TMS) theory. The effectiveness of the charged groups in the membranes is explained by the counterion binding mechanism.
    Additional Material: 3 Ill.
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  • 3
    ISSN: 0173-2803
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 3 Ill.
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  • 4
    Electronic Resource
    Electronic Resource
    Basel : Wiley-Blackwell
    Die Makromolekulare Chemie, Rapid Communications 7 (1986), S. 249-253 
    ISSN: 0173-2803
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 2 Ill.
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  • 5
    Electronic Resource
    Electronic Resource
    Basel : Wiley-Blackwell
    Die Makromolekulare Chemie, Rapid Communications 8 (1987), S. 583-587 
    ISSN: 0173-2803
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 2 Ill.
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  • 6
    Electronic Resource
    Electronic Resource
    Basel : Wiley-Blackwell
    Die Makromolekulare Chemie, Rapid Communications 9 (1988), S. 687-691 
    ISSN: 0173-2803
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 6 Ill.
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  • 7
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 23 (1985), S. 2033-2042 
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Poly- and bis(thiacrown ether) derivatives in which some oxygen atoms of benzocrown ether moiety are replaced by sulfur atoms have been synthesized. Their cation-binding abilities were investigated by using the solvent extraction method. The poly- and bis(benzothiacrown ether)s showed great affinity for silver ion, being more excellent in the affinity than the corresponding monocyclic analogs. They, however, possess very poor cation-binding ability for alkali and alkaline-earth metal ions. The poly- and bis(thiacrown ether)s also bind mercuric ions effectively, whereas the corresponding monomeric analogs do not at all.
    Additional Material: 2 Ill.
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  • 8
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 23 (1985), S. 2327-2331 
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
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  • 9
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 32 (1986), S. 4573-4580 
    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: Nylon-3 prepared by hydrogen transfer polymerization of acrylic amide was N-methoxymethylated by paraformaldehyde/methanol in its formic acid solution. This product was soluble in water, and we were able to obtain a transparent membrane by casting of the solution. Absorbance of the NH group on IR spectrum was decreased by methoxymethylation, and from this depression of absorbance a degree of N-methoxymethylation of about 33% was obtained which agreed with the value from elemental analysis. DSC curve of this polymer showed a endothermic peak at 80°C which was assumed to be the Tg and a exothermic peak starting at 180°C which was assumed to be the crosslinking reaction. The degree of crystalinity of this polymer was about 40% which was obtained by deuterium exchange reaction with deuterium oxide. By heating of this polymer membrane up to 190°C, it was changed to an insoluble polymer by the crosslinkage reaction between methoxymethyle and unreacted amide groups. This insoluble polymer membrane was used for the separation of water/alcohol mixture by the pervaporation technique. Through the membrane, water was permeated selectively compared with alcohol and the selective permeation was found to increase by raising the heat treatment temperature.
    Additional Material: 9 Ill.
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  • 10
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 33 (1987), S. 3019-3036 
    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: The macroscopic order parameter S in the cholesteric liquid crystalline phase of hydroxypropyl cellulose (HPC) and ethyl cellulose (EC) solutions was calculated using refractive index data. Haller's extrapolation approach was used. The S calculated was compared with the S predicted from Doi's theory. The calculated values of S for HPC and EC solutions were in the range of 0.4-0.8 within our experimental range, and agreed with the predicted values of S obtained with Doi's theory. This result suggests that Haller's approach is valid for determining S for liquid crystalline solutions of HPC and EC, despite the scattering of the data at higher temperatures.
    Additional Material: 24 Ill.
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