Accession Number : AD0255786

Title :   IMPROVEMENT OF MECHANICAL AND THERMOMECHANICAL PROPERTIES OF PLASTICS BY THE USE OF ACTIVE FILLERS

Corporate Author : LIBRARY OF CONGRESS WASHINGTON D C AEROSPACE TECHNOLOGY DIV

Report Date : 10 APR 1961

Pagination or Media Count : 1

Abstract : A method of introducing active fillers, such as bentones, into polymers to improve mechanical and thermomechanical properties is reported. Incorporation of a filler suspended in a solvent into a polymer solution is described. The effect produced by active (i.e., increasing mechanical strength of the polymer by orienting the molecules) and inactive fillers were compared. Hardness testing, thermal analysis, plotting of thermomechanical curves, and other physical tests indicated definite improvement of mechanical and thermomechanical properties of polymethylmethacrylate filled with active fillers. Among other improvements in physical properties, the viscousflow point and the thermal-decomposition point of specimens were approximately 50 to 20 degrees higher, respectively, than the corresponding points of the unfilled polymer. Polymethylmethacrylate filled with chalk displayed some degradation in physical properties. (Author)

Descriptors :   *ACRYLIC RESINS, *PLASTICS, ADDITIVES, CALCITE, CLAY, DECOMPOSITION, HARDNESS, HEAT, MANUFACTURING, MECHANICAL PROPERTIES, METHYL RADICALS, MINERALS, PHYSICAL PROPERTIES, POLYMERS, REINFORCING MATERIALS, TEMPERATURE, VISCOSITY

Distribution Statement : APPROVED FOR PUBLIC RELEASE