Molecularly Dispersed Polymer-Ceramic Nanocomposites

摘要

We are concentrating our efforts on the synthesis and characterization ofmolecularly dispersed polymer-ceramic nanocomposites and the development of new thermosets. The synthesis of the nanocomposites involves dispersion of an organically modified mica-type silicate (OMTS) in a suitable organic monomer, followed by polymerization. Under proper conditions delamination of the OMTS into individual silicate layers occurs, which ultimately dispersed within the macromolecular matrix. This approach has a number of advantages over conventional processing of composites, such as (1) molecular dispersion of the silicate takes full advantage of the high aspect ratio (100-1000) particles, (2) functionalized organic molecules bound to the surface of the silicate can crosslink with the epoxy resin to enhance interfacial adhesion, and (3) enhanced physical properties can be achieved at low silicate loadings, resulting in lightweight composites. New liquid crystalline thermosets have been developed with superior fracture and modulus properties. They are also capable of orientation-on-demand behavior. p1.