Synthesis and characterization of ladder-like structured polysilsesquioxane with carbazole group
Poly(propyl carbazole silsesquioxane) (PPCSQ) with a high molecular weight ( M w = 10,200) was synthesized by the direct hydrolysis of 9-[3-(trimethoxysilyl) propyl]-9H-carbazole with K 2 CO 3 , followed by a condensation reaction in an H 2 O/dimethylformamide (DMF) mixture solvent at 25 °C. The obt...
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Veröffentlicht in: | Macromolecular research 2011, 19(3), , pp.261-265 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Poly(propyl carbazole silsesquioxane) (PPCSQ) with a high molecular weight (
M
w
= 10,200) was synthesized by the direct hydrolysis of 9-[3-(trimethoxysilyl) propyl]-9H-carbazole with K
2
CO
3
, followed by a condensation reaction in an H
2
O/dimethylformamide (DMF) mixture solvent at 25 °C. The obtained PPCSQ consisted of ladder-like structured siloxane bonds with carbarzole groups as the pendant group, where the distance between two carbarzole pendant groups through the siloxane backbone was 15.6 Å and the mean thickness of the siloxane backbone was 4.3 Å. This PPCSQ was thermally stable up to 450 °C and the glass transition temperature was ca. 95 °C, showing good film formablity by spin casting. |
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ISSN: | 1598-5032 2092-7673 |
DOI: | 10.1007/s13233-011-0304-3 |