ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

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
  • 1960-1964  (3)
Collection
Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 47 (1961), S. 114-127 
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: In der Arbeit wird über die Kinetik der Polymerisation von n-Butyl- und Isobutylmethacrylat berichtet. Bis zu 30% Umsatz bleibt der mittlere Polymerisationsgrad (DP) im wesentlichen konstant, oberhalb davon steigt der Umsatz. Typisch für die Methacrylsäreester ist die geringe Kettenübertragung zum Monomeren. Für beide Ester wurden die Keimbildungsgeschwindigkeiten ermittelt. Für das Poly-n-butylmethacrylat wurden aus einer doppeltlogarithmischen Auftragung von [η] gegen M die Werte von K und α der STAUDINGER-KUHNschen Gleichung bestimmt (K = 1,138 · 105; α = 0,893). Mit diesen Werten wurden die Molekulargewichte der fraktionierten Proben von Polyisobutylmethacrylat errechnet. Es wurde ferner versucht, die Gültigkeit der PALITschen Gleichung, 100 ρ0[η] + In M = K1M2/3 + K2, zu prüfen.
    Notes: Kinetics of the polymerization of n-butyl methacrylate and isobutyl methacrylate have been reported in this paper. The average degree of polymerization (DP) has been found to remain reasonably constant upto about 30 per cent conversion beyond which it is found to increase with conversion.The methacrylic esters are characterized by low chain transfer to monomer. Ki for both the esters have been determined. From a double logarithmic plot of [η] against M the values of K and α of the STAUDINGER-KUHN equation have been obtained for the poly-n-butyl methacrylate. Using the values of K and α thus obtained molecular weights of fractionated samples of polyisobutyl methacrylate have been calculated. Attempt has been made to test the validity of PALIT's equation connecting [η] and M.
    Additional Material: 11 Tab.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 47 (1961), S. 128-137 
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Es wurde die Kinetik der mit Benzoylperoxyd initiierten Polymerisationen von n-Butylmethacrylat und Isobutylmethacrylat in Benzollösung untersucht. In beiden Fällen sind die Polymerisationsgeschwindigkeiten bedeutend kleiner als bei den Polymerisationen in Substanz, was auf den Abfall der Monomerenkonzentration [M] zurückgeführt werden kann. Die Reaktionsordnung in bezug auf [M] ist bei beiden untersuchten Systemen annähernd 1.
    Notes: Kinetics of the polymerization of n-butyl methacrylate and isobutyl methacrylate initiated by benzoyl peroxide in benzene solution were investigated. In both systems the rates of polymerization were found to be much less compared to bulk polymerization, that can be attributed to decrease in concentration of the monomer. The order of reaction with respect to monomer concentration was found to be nearly unity with both systems studied.The chain transfer constants with benzene (CS) have been determined.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Copolymerisation von n-Butylmethacrylat und Isobutylmethacrylat mit Acrylnitril und Vinylacetat wurde untersucht und die Copolymerisationsparameter berechnet.
    Notes: Copolymerizations of n-butylmethacrylate and isobutyl methacrylate with acrylonitrile and vinyl acetate as comonomers have been studied and the reactivity ratios of the monomers in copolymers reactions computed.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...