ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

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
  • 1
    Electronic Resource
    Electronic Resource
    Cationic polyelectrolytes (1991)
    Springer
    Polymer bulletin 27 (1991), S. 17-24 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Synopsis The aminolysis-hydrolysis of the nitrile groups of PAN with asymmetrical diamines as H2N-(CH2)m-NR2 was investigatied by IR spectroscopy (qualitative and quantitative) and elemental analyses. IR quantitative spectroscopy is an adequately proved method for investigation of the extent of transformation. The amine reactivity depends on the distance between the two amine groups and the size of the alkyl substituents on the tertiary amine. The data support the reaction mechanism by the nucleophilic attack of the primary amine on the two neighbouring nitrile groups.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00296319
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Compatibility of binary systems of poly(methyl methacrylate) poly(vinyl chloride) and poly(vinyl acetate) (1983)
    Springer
    Journal of thermal analysis and calorimetry 26 (1983), S. 23-29 
    Details
    ISSN: 1572-8943
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Kompatibilität binärer polymerer Gemische von Polymethylmethacrylat mit Polyvinylchlorid oder Polyvinylacetat wurde thermogravimetrisch, infrarotspektroskopisch und phasenkontrastmikroskopisch untersucht. Das System Polyvinylchlorid/Polymethylmethacrylat ist durch eine auf die Wechselwirkung zwischen funktionellen Gruppen zurückzuführende Pseudokompatibilität mit zwei maximalen Kompatibilitätsverhältnissen bei 10 PVC/90 PMMA und 80 PVC/20 PMMA gekennzeichnet. Für das System Polyvinylacetat/Polymethylmethacrylat wurden Beweise für eine ”Ketten”-Pseudokompatibilität mit einem maximalen Kompatibilitätsgrad bei 80 PVAc/20 PMMA im Zusammensetzungsbereich von 40–90 Gew.-% PVAc gefunden.
    Abstract: Резюме Совместимость двойн ых полимерных смесей полиметилметакрила та (ПММА) и поливинилхлорида (П ВХ) или поливинилацет ата (ПВА) была изучена с помощь ю термогравиметрии, ИК-спектроскопии и фа зовой контрастной ми кроскопии. Система поливинилхл орид — полиметилметакрил ат характеризуется псевдосовместимост ью, обусловленной взаимодействием фун кциональных групп по лимеров, при двух максимальных соотношениях∶ 10 ПВХ∶90 П ММА и 80 ПВХ∶20 ПММА. Для си стемы поливинилацетат пол иметилметакрилат было найдено докаэат ельство “цепной” псевдосовместимост и для состава 40–90 весовых % с м аксимальной степень ю совместимости при 80 ПВ А∶20 ПММА.
    Notes: Abstract The compatibility of binary polymer mixtures of poly(vinyl acetate) and poly(vinyl chloride) or poly(methyl methacrylate) was studied by thermogravimetry, infrared spectroscopy and phase contrast microscopy. The poly(vinyl chloride)/(poly(methyl methacrylate) system is characterized by pseudocompatibility, due to the interaction of functional groups, with two maximum compatibility ratios, at 10 PVC/90 PMMA and 80 PVC/20 PMMA. For the poly(vinyl acetate)/(poly(methyl methacrylate) system evidence was found of ”chain” pseudocompatibility for the composition range 40–90 wt% PVAc, with a maximum degree of compatibility at 80 PVAc/20 PMMA.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01914085
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Ion exchanger resins, I. Anion exchangers with tertiary amine groups on poly(acrylonitrile-co-divinylbenzene) networks (1992)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 200 (1992), S. 27-36 
    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: Makroporöse Acrylnitril-Divinylbenzol-Copolymere wurden in Gegenwart von 2-Ethyl-1-hexano1 oder Toluol als Verdünnungsmittel hergestellt und bezüglich des Acrylnitrilgehalts und der Struktur charakterisiert. Die Proben mit dem geringsten Homopolymeranteil wurden durch Aminolyse-Hydrolyse der Nitrilgruppen mit N,N-Dialkylaminoalkylaminen in schwach basische Anionenaustauscher transformiert. Aus den Austauschkapazitäten und IR-spektroskopischen Untersuchungen geht hervor, daß die Reaktivität der asymmetrischen Diamine von der Nucleophilie der primären Amingruppe abhängt.
    Notes: Macroporous copolymers of poly(acrylonitrile-co-divinylbenzene) were synthesized in the presence of 2-ethyl-1-hexanol (2EH) and toluene as diluents. The copolymers were characterized by acrylonitrile content and from morphological point of view. Samples with a minimum content of homopolymer were transformed into weak base anion exchangers by the aminolysis-hydrolysis reaction of the nitrile groups with N,N-dialkylaminoalkylamines. The reactions were investigated by the exchange capacity variation and IR-spectral analysis. It was emphasized that the reactivity of asymmetrical diamines depends on the nucleophilicity of the primary amine group.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1992.052000103
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Synthesis and characterization of some 2,4′-dibenzyldiisocyanate ionic polymers, 7Part 6: T. Buruianǎ, A. Caraculacu, Rev. Roum. Chim., in press.. Photochromic behaviour of ionenes with viologen units (1991)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 187 (1991), S. 51-59 
    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: Durch Menschutkin-Reaktion wurden Polyurethane mit kationischen Viologen-gruppen hergestellt. Die photochromen Eigenschaften dieser Polymeren in einer Poly(vinylalkohol)-Matrix wurden mit UV- und Laserlicht untersucht.
    Notes: The Photochromic properties by UV and laser irradiation of cationic polyurethanes with viologen groups introducted by Menschutkin reaction were studied and poly(vinylalcohol) was used as matrix.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1991.051870106
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    facet.materialart.
    Unknown
    Cationic polyelectrolytes (1991)
    Springer
    Details
    Publication Date: 1991-10-01
    Print ISSN: 0170-0839
    Electronic ISSN: 1436-2449
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Published by Springer
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 6
    facet.materialart.
    Unknown
    Evidence for a Circulating Stem Cell: Newly Formed Erythroblasts Found in Autologous Leukocyte-filled Diffusion Chambers Inserted into Bled Rabbits (1971)
    American Society of Hematology
    Details
    Publication Date: 1971-02-01
    Description: Leukocytes from severely bled rabbits were sedimented and introduced in diffusion chambers that were implanted intraperitoneally into donor animals during the same day. Erythroblasts were found in the Millipore chambers on the fourth day culture. They were present in large numbers from the seventh to eighth day when they comprised 47.5 per cent of the nucleated cells present. Concomitantly, the young classes of reticulocytes, never found in controls, were detected in the diffusion chambers of bled animals, after more than 4 days of culture. It was assumed that: (1) Some circulating leukocytes may develop into erythroblasts under the influence of endogenous erythropoietin. (2) Under the experimental conditions employed, bleeding promoted only erythropoiesis within the implanted diffusion chambers containing leukocytes. There was no evidence of granulopoiesis and thrombopoiesis.
    Print ISSN: 0006-4971
    Electronic ISSN: 1528-0020
    Topics: Biology , Medicine
    Published by American Society of Hematology
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
  • 7
    facet.materialart.
    Unknown
    Alignment Properties of Some Polymeric Layers (1997)
    Wiley
    Details
    Publication Date: 1997-01-01
    Print ISSN: 0232-1300
    Electronic ISSN: 1521-4079
    Topics: Geosciences , Physics
    Published by Wiley
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    PAPER CURRENT
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...