Dresden 2006 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
CPP: Chemische Physik und Polymerphysik
CPP 11: POSTER Disperse Polymer Systems
CPP 11.25: Poster
Dienstag, 28. März 2006, 17:00–19:00, P3
Physical characterization of organometallic block copolymers: poly(styrene-b-ferrocenyldimethylsilane) / homo- polymer blends — •Jianjun Xu1,2, Vasilios Bellas1, Ingo Alig2, and Matthias Rehahn1,2 — 1Institut für Makromolekulare Chemie, TU Darmstadt, Petersenstr. 22, D-64287 Darmstadt — 2Deutsches Kunststoff-Institut, Schlossgartenstr. 6, D-64289 Darmstadt
Due to inclusion of iron atom in the chain extraordinary electrical, optical and magnetic properties are expected for polyferrocenylsilane copolymers. We focus here on polyferrocenyldimethylsilane (PFDMS) and polystyrene (PS) diblock copolymer, in which PFDMS is semi-crystalline and PS is amorphous. Synchrotron (SAXS, WAXS), rheological, DSC and dielectric experiments are combined to study phase structure, order-disorder and order-order transitions as well as crystallization of the PFDMS phase. From generalized phase diagram one can conclude that our system is in the weak segregation limit. Synchrotron X-ray experiments show spherical, cylindrical and lamellar morphologies in diblock copolymers blended with the homo polymers (PFDMS or PS) by varying the composition. The DSC experiments indicate the existence of confined crystalline structures. Dielectric relaxation experiments have been performed on doped and undoped samples in order to study conductivity in the organometallic block and polarization effects.