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  • Polymer and Materials Science  (11)
  • Amino Acid Sequence
  • EARTH RESOURCES AND REMOTE SENSING
  • Lunar and Planetary Science and Exploration
  • Molecular Sequence Data
  • 1965-1969  (11)
  • 1955-1959
  • 1969  (11)
Collection
Keywords
Publisher
Years
  • 1965-1969  (11)
  • 1955-1959
Year
  • 1
    Electronic Resource
    Electronic Resource
    Polyamic acid solution viscosityThis paper was presented at the 156th Meeting of the American Chemical Society, Atlantic City, New Jersey, September 1968. (1969)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 7 (1969), S. 1435-1438 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1969.160070812
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  • 2
    Electronic Resource
    Electronic Resource
    Changement de structure de la poly-L-proline à l'état solide par hydratation: Etude par spectrométrie infra-rouge (1969)
    New York : Wiley-Blackwell
    Biopolymers 8 (1969), S. 449-464 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Films of poly-L-proline I and II have been hy drated by water vapor and their infrared spectra analysed between 1250 and 3500 cm-1. Forms I and II behave differently. Water binds to the carbonyl of form II through hydrogen bridges and, when released by drying, leaves the polypeptide conformation unchanged. In form I, complex formation with water seems to proceed through a different mechanism involving more than the carbonyls. Hydration of form I yields a partial irreversible transition to form II. Successive hydration and drying of the film brings the transition to completion. This I → II transition in the solid state has a cooperative character; its mechanism is discussed. Poly-L-prolines I and II also absorb vapors of aliphatic alcohols but not change in conformation is observed.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1969.360080403
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  • 3
    Electronic Resource
    Electronic Resource
    Polyimide solution propertiesPresented at the Fall Meeting of the American Chemical Society, Chicago, Illinois, September, 1967.1 (1969)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 7 (1969), S. 1995-2004 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Solution characterization measurements indicate that cylization of the polyamic acid from 2,4-diaminoisopropylbenzene and pyromellitic dianhydride (PMDA) to the polyimide can be effected with small change in number-average degree of polymerization. An increase in weight-average molecular weight on conversion to polyimide is attributed to branching side reactions. Inherent viscosities of polyimides from 4,4′-diaminodiphenyl ether and PMDA decreased slowly with time in concentrated (97%) sulfuric acid, probably as a result of hydrolytic cleavage. The zero-time viscosity intercepts were related to both the precursor and the estimated polyimide molecular weight. The latter gave ηinh (c = 0.5% solids) = 2.76 × 10-3M̄0.53w for 60,000 〈 Mw 〈 300,000. The exponent is near the lower limit of 0.5 found in theta solvents. The characteristic ratio of the root-mean-square end-to-end distance of a chain to the square root of its molecular weight is 1.1 Å and the steric factor is 1.1; these results suggest that the unperturbed polyimide chain is almost as extended as an equivalent freely rotating chain, a general feature of long-bonded polymers with p-phenylene rings in the chain backbone.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1969.160071202
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  • 4
    Electronic Resource
    Electronic Resource
    The continuum interpretation for fracture and adhesionBased upon a lecture delivered at the Wayne State University, Polymer Conference Series, Detroit, Michigan, May 14, 1968. (1969)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 13 (1969), S. 29-40 
    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: From the viewpoint of continuum mechanics, and particularly the energy concept of fracture, adhesive and cohesive failures are similar. The essential difference involves the interpretation of the energy required to create new (adhesive or cohesive) surface area. A simple pressurized disk test is described for measuring the adhesive value for a bonded elastomer, and an application to a debonding problem in engineering design is given.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1969.070130105
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  • 5
    Electronic Resource
    Electronic Resource
    The diffusion of urea through porous glass (1969)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 3 (1969), S. 273-279 
    Details
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: Work on the rates of diffusion of urea through two different types of porous glass is reported and compared with data obtained using a commercial cellophane membrane from an artificial kidney. The results show that the rate of urea diffusion per unit area through the larger pored glass can be 3-4 times higher than through the cellophane membrane.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jbm.820030207
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  • 6
    Electronic Resource
    Electronic Resource
    Film-balance studies of tactic poly(tert-butyl esters) (1969)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Letters 7 (1969), S. 871-876 
    Details
    ISSN: 0449-2986
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1969.110071210
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  • 7
    Electronic Resource
    Electronic Resource
    α-olefins reaction with systems based on H2AlNR2 and Ni(Acac)3 or Ti(OR)4 (1969)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Letters 7 (1969), S. 547-550 
    Details
    ISSN: 0449-2986
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1969.110070711
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  • 8
    Electronic Resource
    Electronic Resource
    Form birefringence in biaxially oriented polypropylene (1969)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 7 (1969), S. 231-240 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The birefringence of several biaxially oriented polypropylene films swollen with a number of fluids has been measured and found to exhibit a minimum when plotted against the fluid refractive index, as predicted by the theory of Wiener. However, a discrepancy in the form birefringence behavior is observed when samples of different degrees of crystallinity but the same total birefringence are compared. These results are interpreted in terms of Bullough's theory and suggest that this discrepancy arises because of different morphologies. A refractometric technique was employed that makes possible the simultaneous determination of birefringence and the volume fraction of fluid.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1969.160070119
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  • 9
    Electronic Resource
    Electronic Resource
    Transparent barrier resins with high nitrile content (1969)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 13 (1969), S. 2567-2577 
    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 effect of 30-49 wt-% nitrile group content on the properties of copolymers is demonstrated. The nitrile is furnished by either acrylonitrile or methacrylonitrile. The exceptional resistance of such high nitrile content resins to the passage of gases and of solvents is shown and variations therein demonstrated for different comonomers. Transparent, tough, grafted polymers of good color are described which retain these properties. These qualities, combined with low second-order transition temperatures and adequate heat deflection temperatures, provide polymers of interest wherever containment and barrier are desired. Bottles, thermoformed containers, etc., could benefit from the use of some of the polymers described.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1969.070131205
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  • 10
    Electronic Resource
    Electronic Resource
    Kinetics and mechanism of the alkali-catalysed condensations of di- and tri- methylol phenols by themselves and with phenol (1969)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 125 (1969), S. 119-125 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Kinetik der alkalikatalysierten Kondensationen von 2.4- und 2.6-Dihydroxymethylphenol sowie 2.4.6-Trihydroxymethylphenol mit sich selbst und mit Phenol wird unter verschiedenen experimentellen Bedingungen untersucht. Die beobachteten höheren Geschwindigkeiten der Selbstkondensation der Methylolphenole werden auf Grund der unterschiedlichen Reaktionsfähigkeiten der Ortho- und Para-Methylolgruppen sowie der Kernwasserstoffatome in den Methylolphenolen und im Phenol erklärt. Es wird auch ein Kondensationsmechanismus vorgeschlagen.
    Notes: The kinetics of the alkali-catalysed condensations of 2.4- and 2.6-dimethylol phenol and 2.4.6-trimethylol phenol by themselves and with phenol has been studied under various experimental conditions. The observed higher rates of self-condensation of the methylol phenols have been explained on the basis of the relative reactivities of ortho and para methylol groups and the reactivities of the free nuclear positions in methylol phenols and phenol. A mechanism of the condensation reactions is also proposed.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1969.021250112
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