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NLO Behavior of Polymers Containing Y‐Shaped Chromophores
Author(s) -
Carella Antonio,
Borbone Fabio,
Caruso Ugo,
Centore Roberto,
Roviello Antonio,
Barsella Alberto,
Quatela Alessia
Publication year - 2007
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200700275
Subject(s) - chromophore , polymer , thermal stability , glass transition , relaxation (psychology) , materials science , wavelength , polymer chemistry , photochemistry , chemistry , optoelectronics , organic chemistry , composite material , psychology , social psychology
New polyurethanes containing Y‐shaped chromophores, symmetrical derivatives of 4‐(dicyanomethylene)‐2‐methyl‐6‐[ p ‐(dimethylamino)styryl]‐4H‐pyran, have been prepared. The polymers show high glass transition temperatures ( T g ) and a good thermal stability. SHG measurements on poled polymer films of the synthesized polymers have been carried out and a maximum d 33 of 15 pm · V −1 has been found at 1 368 nm fundamental wavelength. Time stability measurements on the most active polymer have shown that after the initial fast relaxation, the d 33 value remains constant at 80 °C for 60 d.
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