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  • 1
    Electronic Resource
    Electronic Resource
    Synthesis and gel-permeation chromatography of oligo(oxyethylene) n-alkyl ethers (1989)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 190 (1989), S. 1207-1215 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Uniform samples of oligo(oxyethylene)s were synthesized: either H(OCH2CH2)mO(CH2)nH or CH3(OCH2CH2)mO(CH2)nH, with m in the range 4 to 16 and n = 9 or 15. The samples were eluted through a low-porosity gel-permeation chromatography column with either dichloromethane (DCM), tetrahydrofuran (THF) or N,N-dimethylacetamide (DMA) as eluent. The elution volumes in the good solvents (DCM, THF) were insensitive to composition, while those in DMA depended on both chain length and composition.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1989.021900526
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  • 2
    Electronic Resource
    Electronic Resource
    Chain folding in poly(ethylene oxide) 2000: Effect of the end group (1979)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 180 (1979), S. 2765-2767 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1979.021801119
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  • 3
    Electronic Resource
    Electronic Resource
    Multiple melting transitions in fractions of partially isotactic poly(propylene oxide) (1970)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 8 (1970), S. 519-528 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Three transitions are detected dilatometrically when partially isotactic poly(propylene oxide) melts. One transition, the temperature of which is independent of the crystallization temperature over a wide range below 60°C, is ascribed to the melting of lamellar crystallites which are limited in thickness by the average isotactic sequence length alone. The other two transitions, the temperatures of which vary with the crystallization temperature, are ascribed to the melting of lamellar crystallites with thickness determined predominantly by three- and two-dimensional primary nucleation acts. The theory of Flory is adapted and applied quantitatively to the melting points of three crystalline fractions of poly(propylene oxide), obtained from a polymer produced via the zinc diethyl and water catalyst system. This method leads to a thermodynamic melting point of isotactic poly(propylene oxide) near 82°C.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1970.160080404
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  • 4
    Electronic Resource
    Electronic Resource
    Unperturbed dimensions of poly(ethylene oxide) (1969)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 7 (1969), S. 575-586 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The intrinsic viscosities of fractions of poly(ethylene oxide) in the molecular weight range 1.5 × 103 to 106 have been measured at 25°C in benzene, carbon tetrachloride, and acetone; at 35°C in 0.45M aqueous potassium sulfate; and at 50°C in methyl isobutyl ketone and diethylene glycol diethyl ether. The latter three are practically theta solvents. The value of (r02/M)1/2 for poly(ethylene oxide) is calculated to be 0.84 Å from the molecular weights of the high molecular weight fractions, and their intrinsic viscosities in the theta solvents and acetone. Erroneous values result if the usual methods of determination are applied to the data obtained for the low molecular weight (〈104) fractions or to the intrinsic viscosities in the very good solvents, benzene and carbon tetrachloride.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1969.160070311
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  • 5
    Electronic Resource
    Electronic Resource
    Incremental modification of styrene-butadiene rubber with tert-dodecyl mercaptan (1961)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 5 (1961), S. 116-123 
    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: The molecular weights and molecular weight distribution of a styrene-butadiene rubber produced at 5°C. according to an incrementally modified recipe with tert-dodecyl mercaptan modifier, do not differ significantly from those of similar conventionally modified rubbers. The limiting effect of diffusion upon the mass transfer of mercaptan in the system provides a consistent explanation of this finding.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1961.070051318
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  • 6
    Electronic Resource
    Electronic Resource
    Crystallization of poly(ethylene oxide) fractions: Crystallization isotherms (1972)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 10 (1972), S. 1555-1564 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The crystallization kinetics of a range of fractions of poly(ethylene oxide) are presented and analyzed. It is concluded that deviations from the Avrami equation with exponent of 3 are mainly due to rejection of low molecular weight molecules for the low molecular weight fractions (M̄n 〈 6,000) and to a process of crystal perfecting for the high molecular weight fractions (M̄n 〉 6,000).
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1972.160100812
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  • 7
    Electronic Resource
    Electronic Resource
    Crystallization of alcohol ethoxylate diblock copolymers from body-centred cubic micellar phases formed in concentrated aqueous solutions (1998)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 199 (1998), S. 1753-1758 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Crystallization in concentrated aqueous solutions of the alcohol ethoxylate diblock copolymers C11E40, C15E39 and C17E40 (where C = methylene or methyl and E = oxyethylene) has been investigated using small-angle X-ray scattering (SAXS), wide-angle X-ray scattering (WAXS) and rheology. It is shown that the gel phase formed in these materials has body-centred cubic (bcc) symmetry, and that the bcc structure can be macroscopically oriented by large amplitude oscillatory shear. At concentrations above about 55 wt.-% copolymer, crystallization of the poly(oxyethylene) block occurs at low temperatures, and the effect of crystallization from the oriented bcc structure of a 70 wt.-% solution is examined using SAXS/WAXS. Crystallization induces a second phase separation, i.e. the semicrystalline lamellar structure resulting from poly(oxyethylene)-block crystallization is incommensurate with the oriented bcc structure, with which it coexists at low temperatures. However, crystallization produces an unoriented lamellar structure. WAXS indicates that the poly(oxyethylene) in the diblock copolymer crystallizes in its usual (helical) form.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 8
    Electronic Resource
    Electronic Resource
    Characterization of solid polymers. Edited by S. J. Spells. Chapman and Hall, London, 1994. pp. xii + 368, price £69.00. ISBN 0-412-58490-5 (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    Polymer International 37 (1995), S. 231-231 
    Details
    ISSN: 0959-8103
    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
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pi.1995.210370313
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  • 9
    Electronic Resource
    Electronic Resource
    Intrinsic viscosity-molecular weight relationship for cis-1,4-polyisoprene (1963)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 7 (1963), S. 507-514 
    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: The intrinsic viscosity-molecular weight relationship has been determined for synthetic cis-1,4-polyisoprene prepared with butyllithium initiator. The best representation of our results is the equation, [η] = 2.00 × 10-4 (M̄v)0.728, for intrinsic viscosities determined in toluene at 30°C. This relationship agrees, within experimental error, with that obtained for natural rubber by Carter, Scott, and Magat.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1963.070070209
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  • 10
    Electronic Resource
    Electronic Resource
    Determination of the molecular weight distribution of polyisoprene by random scission (1972)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 16 (1972), S. 551-558 
    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: cis-Polyisoprene in dilute solution in toluene (plus antioxidant) undergoes random scission when exposed to γ-radiation. The possibility of using this scission in a method to assess the width of the molecular weight distribution of the polymer has been explored and found potentially useful in situations where conventional methods provide little information.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1972.070160302
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