Accession Number : ADA329683

Title :   Influence of Composition, Chain Architecture and Processing on Polymer Structure and Properties.

Descriptive Note : Final rept. 1 Apr 94-31 Mar 97,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE

Personal Author(s) : Thomas, Edwin L.

PDF Url : ADA329683

Report Date : 10 JUL 1997

Pagination or Media Count : 10

Abstract : This project concerned the fundamental understanding of processing-structure and structure-property relations in block copolymer and liquid crystalline polymer systems. Key to our studies was the availability of model materials which afforded opportunities via new chemical compositions and physical properties. Transmission electron microscopy, low voltage high resolution scanning electron microscopy, light microscopy and atomic force microscopy as well as wide and small angle x-ray scattering were the principal characterization tools. We also employed a special roll cast process to form highly textured samples for investigation of their physical properties. Principal research accomplishments are grouped into 6 areas: influence of architecture on phase behavior; development of experimental techniques; microphase separation in block copolymers; large strain deformation of single crystal thermoplastic elastomers; morphology and dynamic interaction of defects in polymer liquid crystals; and technology transitions.

Descriptors :   *BLOCK COPOLYMERS, PHYSICAL PROPERTIES, ELASTOMERS, TEST METHODS, PHASE STUDIES, LIQUID CRYSTALS, CHEMICAL COMPOSITION, ELECTRON MICROSCOPY, DEFECTS(MATERIALS), THERMOPLASTIC RESINS, X RAY SCATTERING, ATOMIC PROPERTIES, WIDE ANGLES, CASTINGS, NANOTECHNOLOGY.

Subject Categories : Polymer Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE