New materials that contain both org. and inorg. components have potentially new chem. and phys. properties that can even lie outside those bracketed by their components. A series of hybrid polymer-inorg. nanocomposite materials was synthesized using various poly(ethylene oxide)-zeolite mixts. The series included mixts. of PEO-LiX and PEO-GlyLiX, of varying concns. (where Gly = 3-Glycidoxy propyltrimethoxysilane, LiX is Li+-exchanged nano-NaX, and the Li+ source is LiCF3SO3; for all the Li+-contg. samples, the PEO's O:Li+ mole ratio is 12:1). Their glass transition and melting temps. were detd. using a Perkin-Elmer Pyris-1 differential scanning calorimeter. The thermal cond. of the samples was measured using a TC-30 from Mathis Instruments. Measurements on natural composite materials, ivory and fish bone, is discussed.