Accession Number : ADA192092

Title :   Improved Structural Polymer Alloys and Composites.

Descriptive Note : Final rept. 1 May 85-30 Apr 87,

Corporate Author : MASSACHUSETTS UNIV AMHERST DEPT OF POLYMER SCIENCE AND ENGINEERING

Personal Author(s) : Karasz, Frank E

PDF Url : ADA192092

Report Date : 30 Apr 1987

Pagination or Media Count : 36

Abstract : Considerable success we achieved relative to the goals of this project. Most importantly, a new generic class of high performance polymer blends was discovered. It is believed that polybenzimidazoles and polymides are miscible over a wide range of compositions, structural variations and temperature regimes. This assertion is based on work with the blends described in this report, utilizing commercially available materials. Evidence for their miscibility was displayed in their glass transition behavior, as elucidated by DSC and DMA, and in their IR spectral properties. Their phase behavior was also examined. Several blend combinations have been scaled up for evaluation to delineate technologically useful systems. The synthesis and properties of two high performance ionomers were also investigated: sodium sulfonate (Udel) polysulfone (Na-SPSF) and sodium sulfonate poly(ether ether ketone) (Na-SPEEK). Improved and novel synthetic techniques were developed so that random, homogenous copolymers could be prepared. Their glass transition behavior and thermal stabilities were assessed. Their blend properties were also assessed and analyzed theoretically in terms of a mean-field treatment. Interaction parameters were calculated.

Descriptors :   *POLYMERS, *COMPOSITE MATERIALS, COPOLYMERS, GLASS, INTERACTIONS, IONOMERS, MIXING, PHASE STUDIES, POLYBENZIMIDAZOLE, SODIUM, SPECTRA, STRUCTURAL PROPERTIES, SULFONATES, SYNTHESIS, THERMAL STABILITY, SYNTHESIS(CHEMISTRY), POLYIMIDE PLASTICS, INFRARED SPECTROSCOPY, SULFONES, SULFONATES, KETONES, ETHERS

Subject Categories : Plastics
      Laminates and Composite Materials
      Polymer Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE