Accession Number : ADA311804

Title :   Molecularly Dispersed Polymer-Ceramic Nanocomposites.

Descriptive Note : Final technical rept. 1 Mar 92-28 Feb 96,

Corporate Author : CORNELL UNIV ITHACA NY DEPT OF MATERIALS SCIENCE AND ENGINEERING

Personal Author(s) : Giannelis, Emmanuel P. ; Ober, Christopher K.

PDF Url : ADA311804

Report Date : JUL 1996

Pagination or Media Count : 8

Abstract : We are concentrating our efforts on the synthesis and characterization of molecularly 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

Descriptors :   *DISPERSING, *MOLECULES, *POLYMERS, *COMPOSITE MATERIALS, *SILICATES, HIGH RATE, SYNTHESIS, INTERFACES, LAYERS, PHYSICAL PROPERTIES, POLYMERIZATION, ADHESION, FRACTURE(MECHANICS), LIQUID CRYSTALS, CROSSLINKING(CHEMISTRY), PARTICLES, ORGANIC COMPOUNDS, LIGHTWEIGHT, MACROMOLECULES, MONOMERS, EPOXY RESINS, DELAMINATION, ASPECT RATIO.

Subject Categories : Laminates and Composite Materials
      Polymer Chemistry
      Ceramics, Refractories and Glass
      Atomic and Molecular Physics and Spectroscopy
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE