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  • 2005-2009  (2)
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  • 1
    Online Resource
    Online Resource
    Cover Picture: Macromol. Chem. Phys. 3/2006
    Wiley ; 2006
    In:  Macromolecular Chemistry and Physics Vol. 207, No. 3 ( 2006-02-03), p. 257-257
    Details
    In: Macromolecular Chemistry and Physics, Wiley, Vol. 207, No. 3 ( 2006-02-03), p. 257-257
    Abstract: Cover: The radical deactivation readily becomes diffusion controlled and causes an acceleration in the atom transfer radical polymerization of polylpar;ethylene glycolrpar; dimethacrylate. The rate increases with a decrease in the spacer length lpar;CH 2 CH 2 Orpar; x between the vinyl moieties of the dimethacrylate due to a more rigid network structure. Further details can be found in the article by Q.Yu, * J. Zhang, M. Cheng, and S. Zhu * on page 287.
    Type of Medium: Online Resource
    ISSN: 1022-1352 , 1521-3935
    URL: Issue
    URL: Article
    DOI: 10.1002/macp.v207:3
    DOI: 10.1002/macp.200690002
    RVK:
    VA 5810
    Language: English
    Publisher: Wiley
    Publication Date: 2006
    detail.hit.zdb_id: 1475026-0
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  • 2
    Online Resource
    Online Resource
    Kinetic Behavior of Atom Transfer Radical Polymerization of Dimethacrylates
    Wiley ; 2006
    In:  Macromolecular Chemistry and Physics Vol. 207, No. 3 ( 2006-02-03), p. 287-294
    Details
    In: Macromolecular Chemistry and Physics, Wiley, Vol. 207, No. 3 ( 2006-02-03), p. 287-294
    Abstract: Summary: The reaction behavior and kinetics of the atom transfer radical polymerization (ATRP) of poly(ethylene glycol) dimethacrylates (PEGDMA) were studied with respect to polymerization rate, vinyl conversion and the development of a crosslinked network. The polymerization rates were much slower than the corresponding conventional free radical polymerizations with the ATRP systems exhibiting milder autoacceleration. The linear relationship of the semi‐logarithmic kinetic plot of ln([M] 0 /[M]) vs. time did not provide good evidence for any living nature of the system because of the combined effects of diffusion controlled radical deactivation and diffusion controlled monomer propagation. The influence of the spacer length (CH 2 CH 2 O) x between the vinyl moieties of the dimethacrylates on the polymerization kinetics was examined. The polymerization rate and final vinyl conversion increased as value of x decreased from 14 to 9 to 4. These increases in rate and conversion were caused by a more rigid network structure with shorter spacer lengths, and thus more restricted diffusion of the catalyst/ligand complexes that impeded the radical deactivation. The effect of temperature on the polymerization rate and final vinyl conversion were also investigated. Apparent rate constants versus vinyl conversions for the ATRP of PEGDMA with the different spacer lengths at 100 °C. magnified image Apparent rate constants versus vinyl conversions for the ATRP of PEGDMA with the different spacer lengths at 100 °C.
    Type of Medium: Online Resource
    ISSN: 1022-1352 , 1521-3935
    URL: Issue
    URL: Article
    DOI: 10.1002/macp.v207:3
    DOI: 10.1002/macp.200500378
    RVK:
    VA 5810
    Language: English
    Publisher: Wiley
    Publication Date: 2006
    detail.hit.zdb_id: 1475026-0
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
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