Accession Number : AD0850991

Title :   Temperature Dependence of Relative Modulus in Filled Polymer Systems,

Corporate Author : MONSANTO RESEARCH CORP ST LOUIS MO

Personal Author(s) : Nielsen, Lawrence E. ; Lewis, Thomas B.

Report Date : APR 1969

Pagination or Media Count : 34

Abstract : The temperature dependence of relative modulus observed in filled thermoset, thermoplastic and polyelectrolyte salt matrices is explained on the basis of induced stresses produced by the differences in the thermal expansion coefficients of the constituent materials. The analysis is based on the assumption that the modulus of the matrix in a filled polymer is less than that of the unfilled polymer. The temperature dependence of expansion coefficients, the volume fraction, the relative modulus in the unstressed state and mechanical properties of the phases. Agreement is good between the analysis and experimental results for three systems: epoxy and glass, polyethylene and wollastonite, and a polyelectrolyte salt with mica and asbestos. (Author)

Descriptors :   *THERMAL EXPANSION), (*COMPOSITE MATERIALS, POLYMERS), (*POLYMERS, ELASTIC PROPERTIES, SALTS, THERMOPLASTIC RESINS, THERMOSETTING PLASTICS, STRESSES, EPOXY RESINS, GLASS, POLYETHYLENE PLASTICS, MICA, ASBESTOS, MODULUS OF ELASTICITY.

Subject Categories : Laminates and Composite Materials
      Plastics
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE