Accession Number : ADA288375

Title :   Macromolecular Characterization and Solution Behavior of Polymer Additives.

Descriptive Note : Final rept. 4 Feb 91-3 May 94,

Corporate Author : STATE UNIV OF NEW YORK AT STONY BROOK DEPT OF CHEMISTRY

Personal Author(s) : Chu, Ben

PDF Url : ADA288375

Report Date : 10 JUN 1994

Pagination or Media Count : 7

Abstract : In the ARO project, several aspects of polymer rheology and microstructures were investigated by using a variety of physical techniques, including the development of a new magnet-enhanced optical falling needle/sphere rheometer. From studies of rheological properties and association behavior of mixtures of poly(isobutyl methacrylate-tert-butyl aminoethyl methacrylate) and an ionomer in solution, and of random copolymers of styrene with sodium-2-acrylamido-2-methylpropane sulphonate, it becomes clear that structures of associative polymers can best be approached by using well-defined block copolymers. Furthermore, the ionic interactions deserve special examination in view of ion cluster formation and long-range inhomogeneities which are present often because of processing procedures. A series of studies of block copolymers, including lightly sulfonated polystyrene-b-poly(tert butylstyrene) and triblock poly(oxyethylene-oxypropylene-oxyethylene) in nonpolar (xylene), polar (water) and water/o-xylene mixtures. The size, shape and aggregation number were determined by using laser light scattering, small angle x-ray scattering and transient electric birefringence techniques.

Descriptors :   * BLOCK COPOLYMERS, * POLYMERS, *ADDITIVES, *MACROMOLECULES, ANGLES, TRANSIENTS, IONS, MAGNETIC PROPERTIES, PHYSICAL PROPERTIES, WATER, PROCESSING, STYRENES, COPOLYMERS, SODIUM, LASER BEAMS, SOLUTIONS(GENERAL), CLUSTERING, LONG RANGE(DISTANCE), ORGANIC COMPOUNDS, ASSOCIATIVE PROCESSING, BIREFRINGENCE, ELECTRIC POWER, HETEROGENEITY, RHEOLOGY, X RAY SCATTERING, XYLENES, METHACRYLATES, BUTYL RADICALS, SULFONATES, IONOMERS.

Subject Categories : Polymer Chemistry
      Organic Chemistry
      Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE