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Titel: Synthesis and Characterization of Phosphorus- and Carborane-Containing Polyoxanorbornene Block Copolymers
VerfasserIn: Kahraman, Gizem
Wang, De-Yi
von Irmer, Jonas
Gallei, Markus
Hey-Hawkins, Evamarie
Eren, Tarik
Sprache: Englisch
Titel: Polymers
Bandnummer: 11
Heft: 4
Verlag/Plattform: MDPI
Erscheinungsjahr: 2019
Freie Schlagwörter: carboranes
phosphonate esters
block copolymers
ROMP
hybrid materials
DDC-Sachgruppe: 540 Chemie
Dokumenttyp: Journalartikel / Zeitschriftenartikel
Abstract: Grubbs-catalyzed ring-opening metathesis polymerization (ROMP) of carborane- and phosphonate-containing monomers has been used for the generation of hybrid block copolymers. Molecular weights with Mn of 50,000 g/mol were readily obtained with polydispersity index values, Đ, between 1.03⁻1.08. Reaction of the phospha ester and carborane substituted oxanorbornene block copolymer with trimethylsilyl bromide led to a new polymer with phosphonic acid functionalities. In application studies, the phospha-carborane functionalized block polymer was tested as heat resistance material. Thermal stability was investigated by thermal gravimetric analysis (TGA) and microscale combustion calorimetry (MCC) analysis. Thermal treatment and ceramic yield under air were directly correlated to the carborane content of the block copolymer. However, phosphorus content in the polymer was more crucial for the char residues when heated under nitrogen atmosphere. The peak heat release rate (PHRR) increased as the number of phosphonate functionalities increased. However, corresponding phosphonic acid derivatives featured a lower heat release rate and total heat release. Moreover, the phosphonic acid functionalities of the block copolymer offer efficient chelating capabilities for iron nanoparticles, which is of interest for applications in biomedicine in the future. The complexation with iron oxide nanoparticles was studied by transmission electron microscopy (TEM) and inductively coupled plasma mass spectrometry (ICP⁻MS).
DOI der Erstveröffentlichung: 10.3390/polym11040613
URL der Erstveröffentlichung: https://www.mdpi.com/2073-4360/11/4/613
Link zu diesem Datensatz: urn:nbn:de:bsz:291--ds-443463
hdl:20.500.11880/39635
http://dx.doi.org/10.22028/D291-44346
ISSN: 2073-4360
Datum des Eintrags: 12-Feb-2025
Fakultät: NT - Naturwissenschaftlich- Technische Fakultät
Fachrichtung: NT - Chemie
Professur: NT - Prof. Dr. Markus Gallei
Sammlung:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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