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
    Functionalization of isotactic poly(propylene) with maleic anhydride in the solid phase (1996)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 243 (1996), S. 57-67 
    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: Der Einfluß der Temperatur und der Art des Initiators auf den Wirkungsgrad der Pfropfung von Maleinsäureanhydrid auf Polypropylen wurde untersucht. Es wurde festgestellt, daß aliphatische Peroxide wie z. B. Lauroylperoxid ungefähr um 20% effektiver sind als Dibenzoylperoxid, Dicumylperoxid, 2,5-Dimethyl-2,5-di-tert-butylperoxyhexan oder Peroxybenzoesäure-tert-butylester.Der höhere Wirkungsgrad der Pfropfung von Maleinsäureanhydrid auf Polyethylen im Vergleich zu Polypropylen kann mit der längeren kinetischen Kette der Additionsreaktion bei Polyethylen erklärt werden.
    Notes: The influence of temperature and type of initiator on the grafting efficiency of maleic anhydride onto isotactic poly(propylene) powder under solid-state reaction conditions was investigated. The level of bonded maleic anhydride was found to be about 20% higher using aliphatic peroxide, such as lauroyl peroxide, in contrast to dibenzoyl peroxide, dicumyl peroxide, 2,5-dimethyl-2,5-di-tert-butylperoxyhexane or tert-butyl perbenzoate as initiator.The higher grafting efficiency of maleic anhydride onto polyethylene when compared with poly(propylene) is accounted for by a higher kinetic length of the addition-transfer chain reactions.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1996.052430105
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Cross-linking of poly(methyl methacrylate) by aminolysis of ester functions with diamines (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 55 (1995), S. 39-45 
    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: The cross-linking of poly(methyl methacrylate) (PMMA) macromolecules by primary aliphatic diamines was carried out at 413-473 K, above the polymer glass transition temperature. The spherical grains of the suspension-prepared polymer (0.25-0.8 mm) and the molar ratio to amine above 20 were used. The reaction is characterized by an induction period before the macroscopic gel was observed and by fast network formation. Both phenomena are temperature-dependent (87± 2 kJ mol-1). The rate of gelation is dependent also on the type of diamine; the shorter induction period of gelation and the higher rate of cross-linking were observed when amino groups were separated with longer alkyl chains. From the kinetics of amine uptake with PMMA, however, it can be concluded that gel formation is influenced also by the reactivity of amine in the transamination reaction and by the amount of bounded diamine. Aminolysis of PMMA ester groups proceeds from the very beginning of heating of the reaction charge. The polymer cross-linking prevails when there is more than 60% of diamine attached to PMMA in dependence on the amine type used. © 1995 John Wiley & Sons, Inc.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1995.070550104
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    The decomposition of benzoyl peroxide in polyethylene (1960)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 45 (1960), S. 257-258 
    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 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1960.1204514537
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Remarks on the decomposition of benzoyl peroxide in polymers (1962)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 62 (1962), S. S167 
    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.1962.1206217465
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Graft copolymerization with styrene and methyl methacrylate in very viscous medium (1964)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A: General Papers 2 (1964), S. 3197-3202 
    Details
    ISSN: 0449-2951
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The influence of the viscosity of the medium on the rate and efficiency of a chemically initiated graft copolymerization with styrene and methylmethacrylate was studied. The increase in viscosity was reached partly by formation of the respective homopolymers, partly by the atactic polypropylene. The transfer constant to the atactic polypropylene from growing polystyrene macroradicals and the ratio of the rate constants of reaction of primary radicals with atactic polypropylene and with styrene were determined. It was found that the total efficiency of grafting styrene to atactic polypropylene increases with increasing concentration of polypropylene in the initial mixture and that the conversion of monomer is not a major influence in this case. On the contrary, for grafting of methyl methacrylate to atactic polypropylene a decrease of total efficiency with conversion of monomer was observed. This indicates that the gel effect is not only a function of viscosity of medium but also of the character of polymers in the reaction mixture.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1964.100020719
    Location Call Number Expected 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...