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|標題:||Nonlinear optical hyperbranched polyaspartimide/montmorillonitenanocomposites based on reactive fluorine- orphosphorous-containing organoclays|
|摘要:||A series of novel hyperbranched polyaspartimide/organoclay nanocomposites were developed forsecond-order nonlinear optics. The hyperbranched polyaspartimides were synthesized from an azobenzenechromophore bis(4-aminophenyl(4-(4-nitrophenyl)-diazenyl)phenyl)amine (DAC; A2 typemonomer) and a 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide-containing trimaleimide(Dopo-trimaleimide; B3 type monomer) via Michael addition reaction. Moreover, reactive fluorine- andphosphorous-containing organoclays (F-montmorillonite, i.e. F-MMT and P-montmorillonite, i.e. P-MMT)which had been prepared by modifying the high aspect ratio silicate layers of MMTs with two differentswelling agents 1,1,1-tris[4-(4-amino-2-trifluoromethylphenoxy)-phenyl]ethane (F-triamine) and (9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-yl)tris(4-aminophenyl)methane (P-triamine) were respectivelyincorporated into the nonlinear optical hyperbranched polyaspartimides. The organoclays wereexfoliated and dispersed in the hyperbranched polyaspartimide films. The incorporation of exfoliatedorganoclay F-MMT could effectively enhance the electro-optical (EO) coefficients and temporal stabilityof the hyperbranched polyaspartimides. The hyperbranched polyaspartimide/F-MMT nanocompositeexhibited temporal stability (r33(t)/r33(0) ¼ 73%) at 100 C, EO coefficient r33 of 20.9 pm/V, and opticalloss of 3.0 dB/cm at 1310 nm.|
|Appears in Collections:||化學工程學系所|
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