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  • Polymer and Materials Science  (11)
  • MATERIALS, NONMETALLIC  (9)
  • Humans
  • 1965-1969  (20)
  • 1
    Electronic Resource
    Electronic Resource
    Endgroup modification of unsaturated polyesters. Effect on chemical resistance (1965)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 9 (1965), S. 1681-1700 
    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: Endgroups of unsaturated polyesters formulated with mole ratios of 2/1/3 and 1/1/2 isophthalic acid/maleic anhydride/propylene glycol were modified. Carboxylic acid content was effectively reduced by esterification with alcohols or epoxides, amidation with phenyl isocyanate, or neutralization with amines. Hydroxyl content was reduced by esterification with acids or anhydrides and urethane formation with phenyl isocyanate. Chemical resistance was determined by measuring the decrease in flexural strength and modulus with exposure to 10% solutions of sodium hydroxide and sulfuric acid at 82°C. A 2-week test using the medium chemical-resistant 2/1/3 polyester indicated that any modification which decreased the carboxylic acid content improved chemical resistance. Modifications which increased or decreased the hydroxyl content had no significant effect in the 2-week tests; however, decrease of hydroxyl content appeared important in 6-month exposure tests. The 1/1/2 resins which have high initial chemical resistance had poorer chemical resistance after endgroup modification than the unmodified 1/1/2 resin, with the exception of the phenyl isocyanate-modified product which was equal to the unmodified resin. Water (0.8%) and xylene (0.1%) had no effect on chemical resistance. However, larger amounts of residual solvent were disadvantageous.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1965.070090507
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Carbonate-modified unsaturated polyesters (1965)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 9 (1965), S. 799-800 
    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 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1965.070090236
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Alkylbenzene-Maleic anhydride photoadducts as dianhydrides for epoxies and polyimides (1966)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 10 (1966), S. 1809-1812 
    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: Dianhydrides from ethylbenzene, cumene, and branched C5-C6 alkylbenzene-maleic anhydride photoadducts have a surprisingly high solubility in epoxy resins. Dianhydrides from benzene, toluene, and n-C10-C13 alkylbenzene adducts, which are homologs of the above, were not soluble. Epoxies cured with the ethylbenzene and cumene dianhydride adducts had higher heat distortion temperatures and flexural strengths than epoxies cured with two commerical monoanhydrides. High-melting polyimides were also obtained with these two new dianhydrides.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1966.070101201
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  • 4
    Electronic Resource
    Electronic Resource
    p-Chlorophenyldiazonium hexafluorophosphate as a catalyst in the polymerization of tetrahydrofuran and other cyclic ethersPreliminary reports of parts of this work appeared previously.1,2 (1966)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-1: Polymer Chemistry 4 (1966), S. 2179-2200 
    Details
    ISSN: 0449-296X
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: p-Chlorophenyldiazonium hexafluorophosphate is shown to be a convenient and effective catalyst for initiating the polymerization of tetrahydrofuran (TH) and other cyclic ethers. The polymerizations apparently proceed without any significant termination or transfer reactions (i.e., “living” polymers result), and materials of very high molecular weight can be obtained. A mobile monomer-polymer equilibrium for THF was obtained during polymerization and equilibrium conversions were determined at a number of temperatures. The ceiling temperature derived from these data was 84°C., the heat of polymerization was -4.58 kcal./mole and the corresponding entropy change was - 17.7 cal./°C.-mole. Hydrocarbons are suitable inert solvents for these polymerizations, but concentrated solutions must be used at ambient temperatures in order to stay above the required equilibrium monomer conceiitration and also to dissolve the catalyst which is insoluble in hydrocarbons. It was shown that acyclic ethers act as transfer agents in these polymerizations and that transfer with consequent reduction of molecular weight continues even after monomer-polymer equilibrium is reached. Cyclic ethers do not act as transfer agents but only copolymerize. Trimethyl orthoformate was shown to be a particularly effective transfer agent; it resulted in a polymer with methoxy endgroups and produced methyl formate as a by-product. The data obtained are consistent with a mechanism involving initiation by hydrogen abstraction and polymerization via tertiary oxonium ions associated with PF-6 gegenions. This gegenion is thought to be responsible for the “living” nature of the system.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1966.150040913
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  • 5
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    Glass-, boron-, and graphite-filament-wound - Resin composites and liners for cryogenic pressure vessels. (1967)
    In:  Other Sources
    Details
    Publication Date: 2018-12-01
    Description: Boron and graphite filament-resin composites tensile and interlaminar shear strengths and Al foil liner cyclic life in cryogenic pressure vessel tests
    Keywords: MATERIALS, NONMETALLIC
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    Preliminary investigation of filament-wound glass-reinforced plastics and liners for cryogenic pressure vessels (1965)
    In:  CASI
    Details
    Publication Date: 2019-05-23
    Description: Filament wound glass reinforced plastics and liners for cryogenic pressure vessels
    Keywords: MATERIALS, NONMETALLIC
    Type: NASA-TN-D-2741
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Glass, boron, and graphite filament wound resin composites and liners for cryogenic pressure vessels (1967)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Tensile and interlaminar shear strengths of glass, boron, and graphite filament wound resin composites and liners for cryogenic pressure vessels
    Keywords: MATERIALS, NONMETALLIC
    Type: NASA-TM-X-52350
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    Glass, boron, and graphite filament wound resin composites and liners for cryogenic pressure vessels (1968)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Tensile strength properties of glass, boron, and graphite filament wound resin composites and liners for cryogenic pressure vessels
    Keywords: MATERIALS, NONMETALLIC
    Type: NASA-TN-D-4412
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    Glass- boron-, and graphite-filament-wound resin composites and liners for cryogenic pressure vessels. (1968)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Glass, boron and graphite filament wound resin composites and liners for cryogenic pressure vessels
    Keywords: MATERIALS, NONMETALLIC
    Type: CRYOGENIC PROPERTIES OF POLYMERS; Apr 25, 1967 - Apr 27, 1967; CLEVELAND, OHIO
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    Tensile and cyclic fatigue properties of graphite filament-wound pressure vessels at ambient and cryogenic temperatures. (1969)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Graphite fiber NOL rings and biaxial wound pressurized cylinders tested at ambient and cryogenic temperatures for tensile and cyclic fatigue properties
    Keywords: MATERIALS, NONMETALLIC
    Type: MATERIALS AND PROCESSES FOR THE 70''S, SOCIETY OF AEROSPACE MATERIAL AND PROCESS ENGINEERS, NATIONAL SYMPOSIUM AND EXHIBITION, 15TH; Apr 29, 1969 - May 01, 1969; LOS ANGELES, CALIF.
    Format: text
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