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  • Polymer and Materials Science  (36)
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  • 1
    Electronic Resource
    Electronic Resource
    Structure and properties of semicrystalline polymers via high-frequency acoustic and x-ray measurements. I. Ferroelectric P(VDF/TrFE) copolymer (1993)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 31 (1993), S. 505-512 
    Details
    ISSN: 0887-6266
    Keywords: ferroelectric copolymers ; Brillouinspectroscopy ; irradiation ; acoustic properties ; molecular orientation ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Acoustic, opto-acoustic, and x-ray investigations have been performed in order to study the influence of irradiation, electrical poling, and mechanical orientation on the morphology of ferroelectric random copolymers of vinylidene fluoride and trifluorethylene {P[VDF/TrFE] (70/30)}. The influences of these different treatments on the molecular orientation distribution of the amorphous and crystalline phases are discussed, as well as their influences on the crystallinity of the material. The elastic stiffness and the related viscosity tensors of P[VDF/TrFE] (70/30), the elastic stiffness modulus of the amorphous matrix, and the hierarchy of stiffness constants of the crystalline state have been determined. © 1993 John Wiley & Sons, Inc.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1993.090310501
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  • 2
    Electronic Resource
    Electronic Resource
    Nouvelle chambre de diffraction de rayons X pour les fibres (1952)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 8 (1952), S. 337-343 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: An x-ray diffraction camera, especially adapted for the study of fibers and high polymers, has been designed. By using only pure monochromatic light, obtained by reflection on a crystal of curved quartz (method of Guinier), it is possible to have the sample in a well controlled atmosphere and at a given temperature. The film is separated from the “laboratory-space” and maintained in vacuo. By this technique it was possible to improve considerably the quality of the diagram received.
    Notes: Une chambre de diffraction de rayons X spécialement adaptée à l'étude des fibres et des hauts polymères a été construite. Conçue de façon à utiliser un rayonnement strictement monochromatique obtenu par réflexion sur un cristal de quartz courbé (méthode Guinier), elle permet deplacer l'échantillon dans une atmosphère contrôlée et à une température déterminée. Le film est isolé de “l'espace laboratoire” et est maintenu dans le vide. La qualité des diagrammes a été considérablement améliorée par cette technique.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1952.120080307
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  • 3
    Electronic Resource
    Electronic Resource
    Hydratation de diverses formes polymorphes de la cellulosePresented at the Symposium of the Commission on Macromolecules of the International Union of Pure and Applied Chemistry, Strasbourg, June 9-11, 1952. (1953)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 10 (1953), S. 223-227 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: X-ray diffraction experiments confirm the data obtained by the blotting or centrifuging method, concerning the action of water which penetrates at different degrees in the regions of cellulose. Different forms of cellulose are more or less easily accessible. X-rays only show variations of intensity for native cellulose, but the unit cells are changed for lattices II and IIIα; the transformations are still deeper for cellulose IIIβ. X-ray diffraction does not permit determination of the stoichiometric ratios.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1953.120100210
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  • 4
    Electronic Resource
    Electronic Resource
    Recherches sur la cellulose III régénérée de l'ammoniac-cellulose (1951)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 7 (1951), S. 333-339 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The study of cellulose regenerated from swelled derivatives, obtained by treatment of native cellulose and mercerized cellulose with liquid ammonia, leads to the definition of two corresponding forms which depend on the starting material: cellulose IIIβ and IIIα With water, pattern IIIα gives an enlarged pattern, while pattern IIIβ leads to cellulose II. The links of cellulose IIIα and IIIβ, both of the monoclinic type, show a little difference.
    Notes: L'étude de la cellulose régénérée des composés de gonflement que fournissent avec NH3 liquide la cellulose native et la cellulose mercerisée conduit à la définition de deux formes correspondantes aux matières de départ: les celluloses IIIα et IIIβ. L'action de l'eau fournit avec le réseau IIIα un réseau élargi et avec IIIβ conduit à la cellulose II. Les mailles des celluloses IIIα et IIIβ toutes les deux monocliniques, présentent une petite difference.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1951.120070216
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  • 5
    Electronic Resource
    Electronic Resource
    Formation des alcali-celluloses en milieu hydroalcooliquePresented at the Symposium of the Commission on Macromolecules of the International Union of Chemistry, Strasbourg, June 9-11, 1952. (1952)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 9 (1952), S. 527-530 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Water-alcohol-sodium mixtures are the medium which assist, to a high degree, the formation of sodium compounds of cellulose. Na II-cellulose, for example, which in aqueous solution requires sodium concentration of 8 N, forms at 2 N concentration in a water-alcohol-ethyl medium. The nature of the alcohol influences the fixation of the sodium. The points observed furnish a method of research relating to the analysis of the phenomena of sodium fixation.
    Notes: Les mélanges eau-alcool-soude constituent des milieux qui favorisent, à un haut degré, la formation des composés sodés de la cellulose. La Na II-cellulose, par exemple, quiexige la concentration sodique 8 N, en solution aqueuse, se forme à la concentration 2 N dans le mélange eau-alcool-éthylique. La nature de l'alcool possède une influence sur la fixation de la soude. Les faits observés fournissent une voie de recherches en ce qui concerne l'analyse du phénomène de la fixation sodique.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1952.120090607
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  • 6
    Electronic Resource
    Electronic Resource
    In situ quantitative soft x-ray spectrometry of thin films synthesized by DC sputtering (1994)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 22 (1994), S. 171-174 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Spectrometry of the soft x-ray emitted by the growing film or its substrate during sputtering is used to monitor the film synthesis: determination of native oxide on the substrates, film stoichiometry versus experimental conditions, control of oxygen content during nitride synthesis, etc. Quantitative data can be obtained by using a simple exponential profile for the ionization function.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/sia.740220138
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  • 7
    Electronic Resource
    Electronic Resource
    Positional small-angle X-ray scattering from crazes (1983)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Letters Edition 21 (1983), S. 853-858 
    Details
    ISSN: 0360-6384
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1983.130211012
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  • 8
    Electronic Resource
    Electronic Resource
    Rheo-optical properties of polymers: Relaxation and recovery during absorption and desorption of organic liquids (1976)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 20 (1976), S. 1573-1582 
    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: As part of a study in elucidating the mechanisms by which crazing is initiated in polymers, we have measured the force and birefringence decay which occurs in several polymers when placed in contact with methanol. In all cases, the force decay can be used to determine the rate of bulk diffusion of the liquid into the polymer. In contrast, the birefringence decay appears to be related to shear relaxation mechanisms which are highly dependent on the type of material. For example, in the case of simple rubbers such as polyisoprene, the rates of decay of force and birefringence are identical within experimental error. In contrast, in amorphous thermoplastics the force decay is typically an order of magnitude faster than the birefringence decay. These results are discussed in terms of distortional and orientational birefringence and with respect to the morphology of the glassy state.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1976.070200614
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  • 9
    Electronic Resource
    Electronic Resource
    Rheo-optical properties of polymers. II (1962)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 62 (1962), S. S47 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1962.1206217418
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  • 10
    Electronic Resource
    Electronic Resource
    Segmental mobility of model compounds for rubber reinforcement (1993)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 194 (1993), S. 879-889 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The motion of spin-labeled poly(ethylene oxide) (PEO) grafted on a silica surface in contact with various dense media was studied by electron paramagnetic resonance spectroscopy. Grafted molecules of molecular weight 2000, with grafting ratios of 0,045, 0,057, 0,126 and 0,42 molecules/nm2 have conformations ranging from the single coil regime to the brush regime. A comparison is made between samples prepared by adding the melt of PEO to the grafted silica, and others prepared by adding model compounds of rubber, namely squalane and squaleneSqualane: system. name: 2,6,10,15,19,23-hexamethyltetracosane.Squalene: system. name: 2,6,10,15,19,23-hexamethyl-2,6,10,14,18,22-tetracosahexaene.. The local elementary mobilities of the loops and tails of PEO are shown to be affected by all these factors.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1993.021940312
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