Hochschulschrift

Large area crystal surfaces of precisely side-branched polyethylenes: preparation, surface order and functionalization

Zusammenfassung: Upon crystallization of polymers containing precisely spaced side-branches, the side-branches are excluded from the crystalline core of the lamellar crystal. Thus, the surfaces of these crystals are covered by side-branches. By using carboxyl groups as side-branches, which can be ionized in aqueous environments, self-stabilized nanocrystal dispersions can be prepared. In principle, the carboxyl groups also allow for the covalent attachment of functional molecules to the lamellar crystals using well established strategies for amide bond formation. However, the fold surfaces of the crystals need to be highly ordered so that the carboxyl groups are accessible for functionalization.From x-ray scattering in semicrystalline bulk, we found that precisely spaced side-groups do not predefine the thickness of the crystalline core under all crystallization conditions. In addition, the part of the fold layer containing carboxyl groups had a considerable thickness, indicating that there is a substantial disorder in the fold surfaces of lamellar crystals of polymers containing precisely spaced side-branches.

Standort
Deutsche Nationalbibliothek Frankfurt am Main
Umfang
Online-Ressource
Sprache
Englisch
Anmerkungen
Albert-Ludwigs-Universität Freiburg, Dissertation, 2016

Klassifikation
Chemie

Ereignis
Veröffentlichung
(wo)
Freiburg
(wer)
Universität
(wann)
2016
Urheber
Beteiligte Personen und Organisationen

DOI
10.6094/UNIFR/11069
URN
urn:nbn:de:bsz:25-freidok-110694
Rechteinformation
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Letzte Aktualisierung
25.03.2025, 13:46 MEZ

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Objekttyp

  • Hochschulschrift

Beteiligte

Entstanden

  • 2016

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