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  • Polymer and Materials Science  (85)
  • PROPULSION SYSTEMS  (27)
  • ASTROPHYSICS
  • 1970-1974
  • 1965-1969
  • 1960-1964  (112)
  • 1963  (112)
Collection
Keywords
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  • 1970-1974
  • 1965-1969
  • 1960-1964  (112)
Year
  • 1
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    The spacecraft radiation experiments (1963)
    In:  CASI
    Details
    Publication Date: 2006-10-26
    Description: Radiation experiments of telstar satellite
    Keywords: PROPULSION SYSTEMS
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
    Electronic Resource
    Electronic Resource
    Heterogeneous polymer systems. II. Characterization of graft copolymers of styrene on polyethyl acrylate (1963)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 7 (1963), S. 59-69 
    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 isolation of two graft copolymers of styrene on polyethyl acrylate from the ungrafted homopolymers by solvent extraction procedures is discussed. For the grafts and their corresponding mixtures ηsp/c versus c plots were determined, and no anomalies were observed. Qualitative data on the solubilities and phase properties of the grafts are given. Torsional modulus-temperature curves are shown for graft copolymer and the individual homopolymers.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1963.070070106
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  • 3
    Electronic Resource
    Electronic Resource
    On a relationship between stereoregularity and particle size broadeningNo. 6 in a series on stereoregularity. Contribution No. 141 from Chemstrand Research Center, Inc. (1963)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Letters 1 (1963), S. 77-78 
    Details
    ISSN: 0449-2986
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1963.110010204
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Syndiotactic polyvinyl formate and derived polyvinyl alcohol (1963)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A: General Papers 1 (1963), S. 951-964 
    Details
    ISSN: 0449-2951
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A study was made of the effect of polymerization temperature on the syndiotacticity of polyvinyl formate. Vinyl formate was polymerized with ultraviolet light initiation in the temperature range from -20 to +30°C. The value of (Ep  -  Et)/2 obtained, 4.5 kcal./mole, is characteristic of those values obtained by other workers for the free radical-initiated polymerization of vinyl acetate. A linear relationship was found to exist between the viscosities of the polyvinyl formates and those of the derived polyvinyl alcohols. The degree of polymerization of polyvinyl formate may be calculated from the equation: [η] = 4.42 × 10-3 DP0.63. The low temperature polymerization of vinyl for- mate results in more syndiotactic polymer, as shown by x-ray diffraction. Polyvinyl for-mate obtained at more elevated polymerization temperatures did not demonstrate the same degree of order. No difference was found between the infrared spectra of the polyvinyl formates. The polyvinyl alcohol derived from polyvinyl formate polymerized at low temperatures (0 to -35°C.) exhibits water resistance and forms a colored iodine complex similar to that obtained with the syndioactic polyvinyl alcohol derived from polyvinyl trifluoroacetate. Conventional polyvinyl alcohol and that derived from polyvinyl acetate polymerized at -30°C. do not exhibit the same properties. Minor differences in the 1,2-glycol content in the various polyvinyl alcohols do not account for the differences in the observations. The amount of head-to-head addition in various vinyl aliphatic esters seems to be related to the inductive strength of the acid portion of the ester. No difference was found between the crystallinities of the various polyvinyl alcohols, as measured by film density. Heat treatment increases the crystallinities about the same amount, but the water resistance of the stereoregular materials remains higher. From the good correlation between the observations made on polyvinyl formate and the derived polyvinyl alcohol, it is concluded that syndiotactic polyvinyl formate, and hence syndiotactic polyvinyl alcohol, is obtained by the low temperature free radical-initiated polymerization of vinyl formate. Increased syndiotacticity is more readily obtained in polyvinyl formate than in polyvinyl acetate, indicating the greater influence of inductive effect compared with the steric effect in controlling stereoregularity during free-radical propagation.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1963.100010310
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  • 5
    Electronic Resource
    Electronic Resource
    A study on the thermal degradation of rubber in dilute solutionsCommunication No. 529 from the National Chemical Laboratory, Poona-8, India. (1963)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 7 (1963), S. 2199-2209 
    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 kinetics of low-temperature (60-100°C.) thermal degradation of deproteinized and deresinified petroleum ether soluble fraction of natural rubber in two chemically inert solvents, cyclohexane and trans-decalin, have been studied. The changes in Mw, A2, and (r2)1/2 at various stages of degradation have been obtained from the lightscattering data. The rate constants and the energy of activation for chain scission have been calculated from the observed variation in Mu. The scission has been found to be random and the average energy of activation is 25.8 kcal./mole. This low-energy requirement suggests the presence of weak links in the rubber molecule which get ruptured at low temperature.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1963.070070619
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  • 6
    Electronic Resource
    Electronic Resource
    Polymer flow irregularities (1963)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 7 (1963), S. S27 
    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
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1963.070070629
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  • 7
    Electronic Resource
    Electronic Resource
    Calibration device for an extensometer (1963)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 7 (1963), S. S15 
    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
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1963.070070331
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  • 8
    Electronic Resource
    Electronic Resource
    Fortschritte der Verfahrenstechnik, Bd. 5 (1960/61). Herausgegeben von H. Miessner, Farbenfabriken Bayer AG., Leverkusen, Ingenieur-Wissenschaftliche Abteilung. Schriftleitung H. Miessner und E. O. Schmidt. Verlag Chemie, GmbH., Weinheim/Bergstr., 1962, XXIII, 1113 S., 90 Abb., 42 Tab., 8°, Ganzl. DM 120, -  (1963)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 14 (1963), S. 1080-1080 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19630141213
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  • 9
    Electronic Resource
    Electronic Resource
    Effect of a helix-coil transformation on magnesium binding to α-poly-L-glutamic acidThis paper was presented in part at the 142nd National Meeting of the American Chemical Society, Atlantic City, New Jersey, September 1962. (1963)
    New York : Wiley-Blackwell
    Biopolymers 1 (1963), S. 269-276 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The effect of magnesium ion binding on the dissociation of side chain carboxyl group in α-poly-L-glutamic acid has been measured by a modified titration technique involving pretitration of the polyacid with a strong base of a weakly bound counterion followed by addition of aliquots of the neutral salt of the more strongly bound counterion, magnesium chloride. The changes in the ionization of the carboxylic acid groups in the poly-L-glutamic acid side chains have been measured as a function of both the degree of preionization and of the concentration of magnesium chloride added. These changes have been related to changes in the polymer configuration (helix-coil transition) as a function of degree of pre-ionization. The effects of ionic strength and of ion binding have been determined by a comparison of tetramethyl ammonium chloride and of magnesium chloride at the same ionic strength. The plot proposed by Wada has been used to determine the pure helical region, the region of helix-coil transition, and the pure coil region with both magnesium chloride and tetramethyl ammonium chloride as added salts. At the same ionic strength the effects produced by magnesium chloride addition are far greater than for tetramethyl ammonium chloride. Magnesium chloride at an ionic strength of 0.25 × 10-4 produces an effect equivalent to that of tetramethyl ammonium at an ionic strength of 15.0 × 10-4. This effect is also apparent when the concentration of carboxyl groups ionized by magnesium chloride addition is determined. The much larger effects produced by the magnesium ion are attributed to the enhanced binding of this ion. The results reported indicate binding is favored in the helical configuration. The binding in the random coil configuration is similar to that reported previously for other randomly coiled polyelectrolytes.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.360010306
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  • 10
    Electronic Resource
    Electronic Resource
    Dialysis studies. V. The behavior of different preparations of bovine ribonuclease (1963)
    New York : Wiley-Blackwell
    Biopolymers 1 (1963), S. 231-238 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Studies of different preparations of ribonuclease A by thin film dialysis and countercurrent distribution have shown the existence of conformational isomers. These forms are slowly interconvertible in a particular solvent environment. They show the minimum molecular weight of ribonuclease and do not differ enzymatically or by rotatory dispersion.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.360010304
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