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  • 1960-1964  (15)
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Keywords
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Years
Year
  • 11
    Electronic Resource
    Electronic Resource
    Aliphatic polyhydrazides: A new low temperature solution polymerization (1964)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A: General Papers 2 (1964), S. 1137-1145 
    Details
    ISSN: 0449-2951
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: High molecular weight polyhydrazides have been prepared by a new low temperature polymerization technique from equimolar amounts of a dihydrazide and a dicarbonyl chloride in dialkyl amide solvents. All-aliphatic polyhydrazides were insoluble in dimethyl sulfoxide, had polymer melt temperatures ranging from 200 to 300°C. Films could be pressed and fibers could be pulled from the melt. Aliphatic-aromatic and oxalic-aromatic polyhydrazides which undergo dehydration at different rates had polymer melt temperatures ranging from 250 to 300°C. and inherent viscosities ranging from 0.3 to 1.5. They were soluble in dimethyl sulfoxide, a solvent from which tough films could be cast.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1964.100020311
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  • 12
    Electronic Resource
    Electronic Resource
    Poly(1,3,4-oxadiazoles): A new class of polymers by cyclodehydration of polyhydrazides (1964)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A: General Papers 2 (1964), S. 1157-1169 
    Details
    ISSN: 0449-2951
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Thirteen aliphatic and aromatic polyhydrazides have been converted as bulk polymer by a unique polymer by a unique polymer post reaction into high molecular weight poly(1,3,4-oxadiazoles). This reaction proceeds by thermal cyclodehydration at 170-280°C. with elimination of water. The resulting poly(1,3,4-oxadiazoles) have been characterized by microanalysis, inherent viscosity, x-ray diffraction patterns, and by infrared and ultraviolet absorption spectra. Films could be pressed from the melt of polyoxadiazoles melting below 350°C., while very high melting or infusible aromatic polyoxadiazoles could not be manufactures into films and fibers by conventional means. Such polymers are extremely thermally and oxidatively stable and decompose between 450 and 500°C.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1964.100020313
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  • 13
    Electronic Resource
    Electronic Resource
    Metal chelates of polyhydrazides (1964)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A: General Papers 2 (1964), S. 1825-1832 
    Details
    ISSN: 0449-2951
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Two all-aromatic polyhydrazides have been investigated with respect to their propensity to form metal-chelate bulk polymer, films, and fibers. The aromatic polyhydrazide derived from isophthalic acid was found to give chelate bulk polymer with Ni+2, Ca+2, Ag+1, Hg+2, Pb+2, Zn+2, Cd+2, and Cu+2 which analyze for a 1:1 ratio of hydrazide link:metal ion. Films of the polyhydrazide-metal chelate were prepared by soaking polyhydrazide films in dimethylformamide solutions of metal salts. Tough fibers of the polyhydrazide-metal chelates with such metal ions as Cr+3, Co+2, and Ag+1 were prepared by passing polyhydrazide fiber through dimethylformamide solutions of these metal salts.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1964.100020423
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  • 14
    Electronic Resource
    Electronic Resource
    The Chemistry of New Heat-Resistant Films and Fibers (1964)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 3 (1964), S. 460-470 
    Details
    ISSN: 0570-0833
    Keywords: Heat resistance ; Fibers ; Polymers ; Materials science ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: This survey is principally concerned with papers published since 1959 on hydrocarbon polymers, aliphatic poly(terephthalamide) fibers, poly(hydroxybenzoic acid) films, poly(oxadiazole) fibers, poly(benzimidazole) films, poly(phenyltriazole) films, poly(pyromellitimide) films, and fibers from cyclized poly(acrylonitrile). All these materials have extremely high melting points and satisfactory in-use characteristics at high temperatures.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/anie.196404601
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  • 15
    Electronic Resource
    Electronic Resource
    The Reaction of 4-Aminoantipyrine with 2,2-Di-(p-hydroxyphenyl) propane Derivatives (1963)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 2 (1963), S. 211-211 
    Details
    ISSN: 0570-0833
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/anie.196302111
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