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  • Polymer and Materials Science  (36)
  • 1
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Röntgendiffraktometrische Untersuchungen und DSC-Messungen an Blend-Filmen, die aus Lösungen von PEEK und PES hergestellt wurden, zeigen eine Phasenseparation bei den Filmen, die bei 340°C hergestellt wurden. Das Kristallisationsverhalten von Filmen, die bei 340°C hergestellt, anschließend abgeschreckt und bei 180°C getempert wurden, ist identisch mit dem von PEEK. Filme, die bei 300°C hergestellt wurden, kristallisierten erst durch Tempern bei 250°C. Blockcopolymere, die aus Oligomeren von PEEK und PES erhalten wurden, unterscheiden sich in dieser Hinsicht von Blends der gleichen Zusammensetzung. Die Glastemperatur von Copolymeren mit einem PEEK-Gehalt von mehr als 50% liegt höher als die von PEEK selbst, während der Schmelzpunkt dieser Copolymeren niedriger als der von PEEK ist.
    Notes: Polymer blends of PEEK with PES were prepared by the solution blending method. Copolymers composed of PEEK and PES components were synthesized from these oligomers. The formation conditions exerted an influence over the molecular aggregation and the crystallization behaviors of the blend films and block copolymers which were examined by X-ray diffractometry and DSC analysis. As a result, phase-separation in the blend films was found when the formation temperature was high. The blend films formed at 340°C, quenched and annealed at 180°C, exhibited the same crystallization behavior as those of PEEK. In the case of the blend films formed at 300°C, the annealing of the films at 250°C was required to crystallize the blend films. The Tg of a copolymer with a PEEK component content of more than 50% tends to shift toward a higher temperature than the Tg of PEEK itself, and the Tm of the copolymer toward a lower temperature than that of PEEK ist.
    Additional Material: 16 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 160 (1988), S. 141-154 
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Der Wärmehärtungsmechanismus von zu Anstrichen verwendeten Polyethersulfonen wurde unter Verwendung von FTIR/PAS und ESCA untersucht. Als Ergebnis wurde bestätigt, daß der Luftsauerstoff Einfluß auf den Wärmehärtungsmechanismus hat. Das heißt, die Härtung des Polyethersulfonfilms beginnt an der Oberfläche und verläuft entsprechend Reaktion (4) weiter.
    Notes: Thermosetting mechanism of paint-use polyethersulfones was studied by utilizing FTIR/PAS and ESCA. As a result, it was confirmed that the oxygen in the air has an effect on the thermosetting mechanism. That is, the polyethersulfone film were baked from the surface, and proceeded according to reaction (4).
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 171 (1989), S. 119-130 
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die aus Lösung hergestellten Polymermischungen zeigen den Typus der vollmischbaren Polymerlegierungen. Proben, die durch Formpressen der Polymermischungen unterhalb des Schmelzpunkts von Polyetheretherketon (PEEK) erhallten wurden, zeigen ein für mischbare Polymerlegierungen typisches viskoelastisches Verhalten. Hingegen zeigt sich bei Mischungen, die oberhalb des Schmelzpunktes von PEEK verpreßt wurden, im dynamisch-viskoelastischen Verhalten eine Phasentrennung.
    Notes: The polymer blends obtained by the solution blending method show a type of compatible polymer blends. The samples obtained by compression molding the polymer blends below the melting point of the polyetheretherketon (PEEK) exhibit dynamic viscoelastic behavior characteristic of compatible polymer blends, but those by compression molding above the melting point of the PEEK show a phase separation in dynamic viscoelastic behavior.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 197 (1992), S. 49-58 
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Das ionische Leitfähigkeitsverhalten und andere Eigenschaften von Filmen aus mit verschiedenen Metallsalzen versetztem Polyacrylnitril (PAN) wurden untersucht. Die Filmoberflächen wurden mit einem neuen Verfahren metallisiert. Aus Kontaktwinkelmessungen ergibt sich, daß die Oberflächenstruktur der Metallsalz enthaltenden Filme stark vom Material abhängt, mit dem das PAN während der Filmherstellung in Kontakt ist. Das Leitfähigkeitsverhalten nahe der Glastemperatur ist für Metallchloride und Metallperchlorate unterschiedlich; bei ersteren ist die Aktivierungsenergie im gummielastischen Zustand (∊r) größer als die im Glaszustand (∊g), während bei letzteren ∊r 〈 ∊g ist. Durch Reduktion der Metallsalze mit wäßriger NaBH4-Lösung bei relativ niedriger Temperatur bildet sich auf der Filmoberfläche eine Metallschicht.
    Notes: The film properties and ionic conductivity behavior of polyacrylonitrile (PAN) containing various metal salts were investigated. Further, with a newly developed process, it was possible to cover the surface of polymer with a metallic layer. From water contact angle measurements it was found that the surface structure of PAN containing metal salt was greatly affected by properties of the material in contact with during film preparation. Ionic conductivity behaviors near Tg differed between the PAN containing a metal chloride and that containing a metal perchlorate; the activation energy for the rubber-like state (∊r) was greater than that for the glassy state (∊g) with the former and ∊r 〈 ∊g with the latter. It was clarified that a metal layer was formed on the polymer surface at a relatively low temperature by a reduction treatment with NaBH4 aqueous solution.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 188 (1991), S. 73-84 
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die thermischen Eigenschaften von Polystyrol and Poly(methylmethacrylat) mit verkapseltem und dispergiertem TiO2 wurden verglichen. Die verkapselnden Polymeren zeigen zwei thermische Relaxationsbereiche, deren nach Wunderlich ermittelte Aktivierungsenergien denen von dynamischen Dispersionen ähnlich sind. Es wird vorgeschlagen, daß die Niedertemperaturrelaxation durch lokale Änderungen der Konformation der Makromoleküle hervorgerufen wird, während die Hochtemperaturrelaxation dem normalen Glasübergang einschließlich der Wechselwirkung mit TiO2 vergleichbar ist. Das thermische Verhalten nahe der Zersetzungstemperatur in verschiedenen Atmosphären deutet darauf hin, daß in den verkapselnden Polymeren spezifische Strukturen vorhanden sind, die eine große Menge Sauerstoff adsorbieren können.
    Notes: Comparing the thermal properties of TiO2 encapsulating polystyrene and poly(methyl methacrylate) with those of TiO2 dispersion polymers it was found that the encapsulating polymers have two thermal relaxation regions. The activation energy of those thermal relaxation regions was determined using the Wunderlich method and it was found that the values are similar to the activation energy for the dynamic dispersion. It is suggested that the low-temperature thermal relaxation is caused by the local change of conformation of molecular chains, while the high-temperature thermal relaxation is similar to that of the normal glass transition temperature including the interaction with TiO2. In addition, the thermal behaviour near the degradation point in different atmospheres indicates that the encapsulating polymer has a specific structure for adsorbing a large amount of oxygen.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 206 (1993), S. 209-216 
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die magnetischen Eigenschaften von durch Reduktion metallsalzhaltiger Polymerer abgeschiedenen Metallschichten wurden untersucht. Durch Variation des Verhältnises von Kobaltionen zu Nickelionen in den Polymeren wurden Koerzivität sowie maximale und remanente Flußdichte der abgeschiedenen Metallschichten zwischen 100 und 600 Oe und zwischen 1000 und 12600 bzw. 500 und 7600 G verändert. Das Röntgenbeugungsmuster der Metallschicht mit hervorragenden magnetischen Eigenschaften zeigt scharfe Peaks, die den (101)- und (100)-Ebenen der Kobalt-α-Modifikation entsprechen. Das deutet darauf hin, daß solche abgeschiedenen Metallschichten hochkristalline Strukturen besitzen.
    Notes: Magnetic properties of metal layer deposited by reduction of polymer containing metal ions were investigated.Varying the ratio of the cobalt ion to the nickel ion in the polymer, the coercivity, the maximum flux density and the remanent flux density of the deposited metal layer were changed from 100 to 600 Oe, from 1 000 to 12 600 G and from 500 to 7 600 G, respectively. The X-ray diffraction pattern of the metal layer with excellent magnetic properties gives distinct peaks corresponding to the (101) and (100) planes of the crystal of α-Co.This suggests that such a deposited metal layer has the structure of highly crystalline metal layer.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 183 (1982), S. 2923-2933 
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Carbon fibers containing thiol groups were produced by reacting carbon fiber oxidized by nitric acid, with excess thiirane. Then, graft polymerization with styrene was carried out in a sealed tube under nitrogen. The following order of initiating ability of the investigated initiators was found: di-tert-butyl peroxide 〉 p-cumenyl hydroperoxide (CHPO) 〉 dodecyl peroxide 〉 benzoyl peroxide 〉 2,2′-azoisobutyronitrile. When CHPO was used as initiator, the rate of graft polymerization was maximum at [CHPO] = 0,01 mol/1. Chain transfer constant and grafting efficiency, both calculated from the equations of Fox and others, were compared with the experimental results.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 193 (1992), S. 2971-2978 
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A polymeric solid electrolyte with high ionic conductivity was prepared by complexing a polyurethane elastomer with LiClO4. The ionic conductivity of these complexes increases proportional to the increase of the content of poly(tetramethylene oxide) component in the polyurethane elastomer and with increasing LiClO4 concentration, and reaches a value of 10-4 S/cm at 80°C for [LiClO4] = 1,20 mmol/g polymer. The polyurethane elastomer-LiClO4 complex has good mechanical properties compared with poly(ethylene oxide)-and poly(propylene oxide)-based complexes.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 193 (1992), S. 1219-1224 
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Polycation perchlorate composites have excellent film-forming properties and high ionic conductivity. The ionic conductivity at 40°C is of the order of 10-7-10-5S·cm-1, depending on the kind of perchlorate. The temperature dependence of the ionic conductivity follows the Williams-Landel-Ferry relationship. Furthermore, the electrochemical polymerization of pyrrole using polycation perchlorate composites as a solid electrolyte produces bilayer composite films.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 27 (1982), S. 4529-4539 
    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: Modified glass fibers, containing unsaturated hydrocarbon surface groups, were prepared by a hydrothermal treatment, with allylglycidylether in excess as reagent. Graft polymerization of the treated glass fiber with styrene and methylmethacrylate was carried out in sealed tubes, under nitrogen, using benzoyl peroxide (BPO) and cumene hydroperoxide (CHPO) as initiators. When BPO was used as the initiator, the grafting efficiency was extremely low, but the graft copolymerization behavior was similar to that of usual organic polymers. With CHPO, both grafting ratio and grafting efficiency were very high. Various properties of composite materials containing grafted glass cloth were studied. Flexural strength, flexural modulus, and interlaminar shear strength increased proportionally to the increase of the grafting ratio; the same values were decreased only in a small extent after the boiling test.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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