|
|||||
|
|
Polyester Preparation in the Presence of Pristine and Phosphonic‐Acid‐Modified Zirconia Nanopowders |
|
| Authors: | Jakob Svehla Silvia Pabisch Bernhard Feichtenschlager Dietmar Holzmann Herwig Peterlik Guido Kickelbick |
| Affiliation: | 1. Institute of Materials Chemistry, Vienna University of Technology, Getreidemarkt 9, A‐1060 Vienna, Austria;2. Faculty of Physics, University of Vienna, Strudlhofgasse 4, A‐1090 Vienna, Austria;3. TIGER Coatings GmbH & Co. KG, Negrellistr. 36, A‐4600 Wels, Austria;4. Inorganic Solid‐State Chemistry, Saarland University, Am Markt Zeile 3, D‐66125 Saarbrücken, Germany |
| Abstract: | A novel zirconia polyester nanocomposite is prepared using an in situ approach. Surface‐functionalized zirconia nanoparticles are obtained by attaching 3‐phosphonopropionic acid to the metal oxide. Neat and surface‐covered metal oxide particles are incorporated at the beginning of the polyesterification reaction of isophthalic acid and neopentyl glycol resulting in zirconia/poly(neopentyl isophthalate) (PNI) nanocomposites. TEM shows that the dispersibility of the inorganic filler is improved by covering the zirconia surface with carboxylic acid groups. These results are verified by SAXS. Rheological measurements reveal that the viscosities are increasing compared to pristine PNI at particle loads of 10 wt% (neat zirconia) and 5 wt% (phosphonic‐acid‐capped zirconia), respectively.  |
| Keywords: | interfaces nanocomposites polyesters small‐angle X‐ray scattering (SAXS) viscosity |