Nanocomposites of NLO chromophore‐modified layered silicates and polypropylene

Intercalation of guest species into layered inorganic solids is a method of producing ordered inorganic–organic assemblies with unique microstructures controlled by host–guest and guest–guest interactions. Smectite clay minerals, such as montmorillonite, having appropriate functional molecules in between the silicate layers are supposed to exhibit a wide range of novel characteristics. Nanocomposite material based on maleic anhydride-grafted polypropylene and dye-modified layered silicate was developed. Characteristics of organo-modified montmorillonite particles and polymer/clay hybrids have been investigated through FTIR, SAXS, DSC, UV measurements, and transmission electron microscopy. The results of the intercalation process, structural characterization, and thermal properties will be discussed in comparison with the intercalation and nanocomposite preparation results. The intercalation was successfully conducted by the ion-exchange method. It was shown that intercalated dibenzilidene acetone type chromophores exist in the clay galleries in an aggregated form, probably as J-aggregates. This feature strongly effects on optical and nonlinear optical properties of nanocomposites. © 2005 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 43: 2493–2502, 2005

[1]  M. Osman,et al.  Structure and Properties of Alkylammonium Monolayers Self-Assembled on Montmorillonite Platelets , 2004 .

[2]  K. Grundke,et al.  Progress in Polypropylene Nanocomposite Development , 2003 .

[3]  A. Morgan,et al.  Effects of organoclay Soxhlet extraction on mechanical properties, flammability properties and organoclay dispersion of polypropylene nanocomposites , 2003 .

[4]  J. Bujdák,et al.  Aggregation and decomposition of a pseudoisocyanine dye in dispersions of layered silicates. , 2002, Journal of colloid and interface science.

[5]  Zhenan Bao,et al.  Symposium H molecular photonics: from macroscopic to nanoscopic applications , 2001 .

[6]  H. Komber,et al.  Ionic Complexes of Bis(hydroxyarylidene)alkanones with Strong Polymeric Bases as a New Class of Third-Order Nonlinear Optical Chromophores , 2001 .

[7]  C. Page,et al.  Layer-by-Layer Growth of Acentric Multilayers of Zr and Azobenzene Bis(phosphonate): Structure, Composition, and Second-Order Nonlinear Optical Properties , 2000 .

[8]  André Persoons,et al.  Second-order non-linear optical polymers , 2000 .

[9]  U. Kolb,et al.  Electron crystallography and organic materials with non-linear optical properties , 1999 .

[10]  U. Kolb,et al.  Structure determination to calculate nonlinear optical coefficients in a class of organic material , 1999 .

[11]  M. Ogawa,et al.  Controlled microstructures of amphiphilic cationic azobenzene-montmorillonite intercalation compounds , 1998 .

[12]  J. Zyss,et al.  Second harmonic generation of dye aggregates in bentonite clay , 1997 .

[13]  B. M. Choudary,et al.  New Triphase Catalysts from Montmorillonite , 1991 .

[14]  G. Lagaly,et al.  Anordnung und Orientierung kationischer Tenside auf Silicatoberflächen , 1971 .

[15]  Michael Kasha,et al.  Energy Transfer Mechanisms and the Molecular Exciton Model for Molecular Aggregates1, 2 , 1963 .