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
  • 1
    Electronic Resource
    Electronic Resource
    Viskositäten der verdünnten Lösungen von Polyisobutylmethacrylat (1974)
    Springer
    Colloid & polymer science 252 (1974), S. 184-184 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01555677
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Viskositäten der verdünnten Lösungen von Poly(tetrahydrofurfurylmethaerylat) (1975)
    Springer
    Colloid & polymer science 253 (1975), S. 802-802 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02464554
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Absolute values of the constants of individual steps in the polymerization of methyl methacrylate (1973)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 166 (1973), S. 219-226 
    Details
    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 Wahl der KUHN-MARK-HOUWINK-Konstanten, verschiedene Methoden der Berechnung von Mn oder v̄ aus der Grenzviskositätszahl, die Wahl der Literaturwerte von ktc/ktd sowie die Größenordnung des Fehlers (±20%) bei der Bestimmung von kp/kt können additiv einen Unterschied vom Faktor drei bis vier bewirken. Die Verschiedenheit der bereits veröffentlichten Werte der Absolutgeschwindigkeitskonstanten bei der Polymerisation von Methacrylsäuremethylester findet damit ihre Erklärung.
    Notes: The choice of the KUHN-MARK-HOUWINK constants, the different ways of evaluating Mn or v̄ from intrinsic viscosity, the selection of ktc/ktd from the literature values and the magnitude of error (±20%) in kp/kt determination may cause by an additive effect a differences of the values of kp and kt by a factor of three to four. The discrepancies in the reported values of the absolute rate constants of the polymerization of methyl methacrylate have been explained by this fact.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1973.021660119
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Solvent effects on radical copolymerization of methyl methacrylate and acrylonitrile (1974)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 175 (1974), S. 1531-1534 
    Details
    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 radikalische Copolymerisation von Methylmethacrylat und Acrylnitril wurde in sechs Lösungsmitteln bei zwei verschiedenen Ausgangs-Monomerverhältnissen und 60°C untersucht. Der Stickstoffgehalt der Copolymeren nimmt in der Reihe Chloroform 〈 Dioxan 〈 Benzol 〈 Anisol 〈 Methylpentylketon 〈 Brombenzol zu, was einen Einfluß der Lösungsmittel auf die wachsenden Radikale nahelegt.
    Notes: Radical copolymerization of methyl methacrylate and acrylonitrile has been studied in six solvents at 60°C, and two monomer feed ratios. The nitrogen contents of the copolymers increases in the order: chloroform 〈 dioxane 〈 benzene 〈 anisole 〈 methyl pentyl ketone 〈 bromobenzene, suggesting an influence of the solvent on the growing radicals.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1974.021750514
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Co(II) acetylacetonate, a radical initiator (1973)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 167 (1973), S. 243-248 
    Details
    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: Durch kinetische Untersuchungen wurde nachgewiesen, daß die mit Co(II)-Acetyl-acetonat angeregte Substanzpolymerisation von Methylmethacrylat nach radikalischem Mechanismus verläuft. Copolymerisationsexperimente an den Systemen Styrol/Methylmethacrylat, Styrol/Acrylnitril und Methylmethacrylat/Acrylnitril, die unter sonst gleichen Bedingungen mit Azoisobutyronitril, Benzoylperoxid, Mn(III)-Acetyl-acetonat und Co(II)-Acetyl-acetonat als Initiatoren durchgeführt wurden, liefern in Übereinstimmung damit identische Produkte; dies weist darauf hin, daß der Anregungsmechanismus in allen Fällen derselbe ist. Polymethylmethacrylate, die mit Co(II)-Acetyl-acetonat als Starter hergestellt wurden, besitzen dieselben (NMR-spektroskopisch bestimmten) Taktizitäten wie die mit konventionellen Radikalstartern erhaltenen Polymeren.
    Notes: The bulk polymerisation of methyl methacrylate and the studies of the resulting polymers have revealed the radical mechanism of initiation with Co(II) acetylacetonate. Copolymerisation studies of styrene/methyl methacrylate, styrene/acrylonitrile, and methyl methacrylate/acrylonitrile under similar conditions, using azoisobutyronitrile, benzoyl peroxide, Mn(III) acetylacetonate, and Co(II) acetylacetonate, have also shown the identical nature of the mechanism of initiation of these initiators. The tacticity of the polymer, deduced from NMR spectra, is identical with that of a polymer prepared with a conventional free radical initiator.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1973.021670116
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Polymerization of methyl methacrylate in solution (1972)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 157 (1972), S. 219-225 
    Details
    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 Polymerisation von Methylmethacrylat in Lösungsmitteln verschiedener Art und Viskosität bei 60°C unter Verwendung von Azoisobuttersäuredinitril als Initiator untersucht. Kp und Ri wurden durch Reaktionsgeschwindigkeit und Molekulargewicht unter der Voraussetzung, daß Kt ≈ 1/ηmisch. ist, bestimmt. Der Wachstumskoeffizient und die Initiierungsgeschwindigkeit scheinen von der Art des Lösungsmittels abhängig zu sein.
    Notes: The polymerization of methyl methacrylate in solvents of different nature and viscosity, has been studied at 60°C using azobisisobutyronitrile as initiator. Kp and Ri have been determined by means of rate and molecular weight and assuming that Kt ≈ 1/ηmix. The propagation coefficient and the rate of initiation, both seems to be affected by the nature of the solvents.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1972.021570120
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Viscosities of dilute solutions of poly(isobutyl methacrylate) (1972)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 160 (1972), S. 313-320 
    Details
    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 Viskositätszahlen von sechs Fraktionen eines Poly(isobutylmethacrylats) (M̄n = 11,59·105 bis 5,01·105) zwischen 25 und 60°C in sieben Lösungsmitteln weisen die nachstehende Reihenfolge auf: Chloroform 〉 Benzol 〉 Brombenzol 〉 Dioxan 〉 Acrylnitril 〉 Aceton 〉 2-Hydroxymethyl-tetrahydrofuran. In guten Lösungsmitteln zeigen die in der Beziehung [η] = kMa auftretenden Werte a und k nur geringe Änderungen mit der Temperatur, die sich jedoch in schlechten Lösungsmitteln bemerkbar machen. Im Falle von Chloroform, dem besten Lösungsmittel, ist a = 0,78; dagegen wird für 2-Hydroxymethyltetrahydrofuran bei 25°C für a = 0,56 gefunden. Die Thetatemperatur für 2-Hydroxymethyl-tetrahydrofuran beträgt 19,5 ± 0,3°C.
    Notes: The intrinsic viscosities of six fractions (M̄n = 11.59·105 to 5.01·105) of poly(isobutyl methacrylate) in seven solvents at temperatures between 25°C and 60°C show the following order: chloroform 〉 benzene 〉 bromobenzene 〉 dioxane 〉 acrylonitrile 〉 acetone 〉 2-hydroxymethyltetrahydrofuran. Values of a and k in the expression [η] = k Ma show little variations with temperature in the case of good solvents, whereas these variations are more pronounced in the case of poor solvents. For chloroform, the best solvent, the value of a was found to be 0.78, and for 2-hydroxymethyltetrahydrofuran at 25°C the value of a is 0.56. The theta temperature for 2-hydroxymethyltetrahydrofuran is 19.5 ± 0.3°C.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1972.021600125
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Co(II) acetylacetonate-initiated polymerization of methyl methacrylate (1972)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-1: Polymer Chemistry 10 (1972), S. 1539-1542 
    Details
    ISSN: 0449-296X
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1972.150100522
    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...