Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 1975-1979  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Struktur und Eigenschaften von ABS-Polymeren, 13. Einfluß der Polymerisationsbedingungen auf die Struktur von ABS-Polymeren bei der Pfropfung in Emulsion (1977)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 58 (1977), S. 213-226 
    Details
    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: By grafting styrene-acrylonitrile onto poly(butadiene) latex graft polymers of different structure are synthesized. During the graft reaction the monomer to poly(butadiene) ratio and the conversion were varied and the influence of these variations on the degree of grafting and the molecular weight of grafted chains was studied. By mixing these graft polymers of different graft structure (graft density) with styrene-acrylonitrile-copolymers, ABS-materials are formed with a rubber content of 17.5% by weight.Glass transition temperature (Tg) of the elastomer phase of these ABS materials as well as notched impact values correlate with graft density of the rubber component.
    Notes: Durch Pfropfung von Styrol-Acrylnitril auf Polybutadien in Emulsion werden Pfropfpolymerisate unterschiedlicher Pfropfstruktur hergestellt. Es wird der Einfluß des Verhältnisses von Monomerem zu Polybutadien auf die Geschwindigkeit der Pfropfreaktion, auf den Pfropfgrad und die Molekulargewichte und der des Umsatzes auf die Molekulargewichte und den Pfropfgrad der Pfropfpolymerisate untersucht.An Hand von Messungen der Glasübergangstemperatur der Kautschukphasen in ABS-Materialien, die aus den so hergestellten Pfropfpolymerisaten erhalten wurden, und an Hand von Messungen der Kerbschlagzähigkeit werden die Bedeutung der Struktur der Pfropfhülle für die Eigenschaften von ABS-Polymerisaten diskutiert.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1977.050580109
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Struktur und Eigenschaften von Mehrphasenkunststoffen I. Verträglichkeit von Polymeren im festen Zustand (1977)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 58 (1977), S. 1-35 
    Details
    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: The miscibility of two polymers with different chemical composition can be estimated by using the Flory-Huggins equation for the free enthalpy of mixing. The Huggins parameter χ and the solubility parameters δ, respectively, are used as a measure of the thermodynamic interaction between two segments of different polymers.The influence of temperature, chemical composition, molecular weight and mixing ratio on the miscibility of homo- and copolymers in the solvent free state are discussed using this calculation procedure.It has been demonstrated experimentally (torsion pendulum and morphological studies on rubber 1/rubber 2, thermoplast 1/thermoplast 2 and thermoplast/rubber mixtures) in which cases reasonable predictions for the polymer miscibility (compatibility) can be made with the aid of the solubility parameter concept.
    Notes: Die Mischbarkeit von chemisch unterschiedlich zusammengesetzten Polymeren kann mit Hilfe der Flory-Huggins-Gleichung für die freie Mischungsenthalpie abgeschätzt werden. Dabei werden als Maß für die thermodynamische Wechselwirkung zwischen den Polymeren der Huggins-Parameter bzw. die Löslichkeitsparameter verwendet.Mit Hilfe dieses Formalismus wird der Einfluß der Parameter Temperatur sowie chemische Zusammensetzung, Molekulargewicht und Mischungsverhältnis der Komponenten auf die Mischbarkeitvon Homo- und Copolymeren im lösungsmittelfreien Zustand diskutiert.Anhand von experimentellen Ergebnissen (dynamisch-mechanische und morphologische Untersuchungen an Kautschuk 1/Kautschuk 2, Thermoplast 1/Thermoplast 2 sowie Thermoplast/Kautschuk-Mischungen) wird gezeigt, in welchen Fällen man mit Hilfe des Konzeptes der Löslichkeitsparameter zu brauchbaren Vorhersagen über die Mischbarkeit von Polymeren kommen kann.
    Additional Material: 16 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1977.050580101
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Röntgenkleinwinkeluntersuchungen zur charakterisierung des crazings in amorphen mehrphasigen polymersystemen (1979)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 75 (1979), S. 167-175 
    Details
    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: The crazing of two rubber-toughened plastics (ABS, HIPS) is investigated by measuring the small angle x-ray scattering (SAXS) during a tensile deformation. In both systems the onset of crazing is observed near the yield-maximum if the samples are continuously strained. The craze-rate of HIPS is much higher than that of ABS and after unloading HIPS shows a considerable recovery in contrast to ABS. The application of SAXS to the characterization of craze-phenomena is compared with that of other methods.
    Notes: An zwei schlagfesten Mehrphasensystemen (ABS, HIPS) wird das Crazing durch Messung der Röntgenkleinwinkelstreuung bei einer mechanischen Verformung verfolgt. In beiden Systemen setzt bei kontinuierlicher Zugbeanspruchung unmittelbar in der Nähe des Yield-Maximums eine starke Craze-Bildung ein. Beim schlagfesten Polystyrol (HIPS) findet man eine in Vergleich zum ABS wesentlich höhere Craze-Rate und nach Entlastung eine ausgeprägtere Reversibilität des Crazings. Die Aussagemöglichkeiten der Röntgenkleinwinkelstreuung zur Craze-Charakterisierung werden mit denen anderer Methoden verglichen.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1979.050750112
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Structure and properties of abs polymers. X. Influence of particle size and graft structure on loss modulus temperature dependence and deformation behaviorPresented at IUPAC Symposium, Madrid, Spain, 1974. (1976)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 20 (1976), S. 2691-2704 
    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: ABS systems which differ distinctly in particle size and degree of grafting were prepared and investigated by dynamic mechanical measurements as function of temperature in the glass transition region of the rubber phase. Variation of rubber content within different sample series results in effects which were mainly referred to thermal stresses as consequence of phase interactions. Basic aspects of the deformation behavior of some of these ABS systems are studied by mechanical and morphological methods, and the operation modes of the component of a bimodal/bigraft-system concerning toughness are discussed.
    Additional Material: 16 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1976.070201007
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...