Accession Number : ADA316239

Title :   Multiple Environment Polydiacetylene Containing Segmented Block Copolymers.

Descriptive Note : Technical rept.,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE DEPT OF MATERIALS SCIENCE AND ENGINEERIN G

Personal Author(s) : Zemach, Ken ; Rubner, Michael F.

PDF Url : ADA316239

Report Date : 26 JUN 1995

Pagination or Media Count : 8

Abstract : We show that it is possible to incorporate polymerizable diacetylene groups within both the hard and soft segments of polyurethane/polyester-based segmented copolymers. The resultant microphase separated polymers are comprised of soft and hard segment domains that are both capable of supporting the solid-state polymerization of the diacetylene groups. Cross-polymerization of the diacetylene groups therefore creates polydiacetylene chains within two distinctly different microenvironments, each with its own thermal and mechanical behavior. As a result of this, these new multiple environment polydiacetylene containing block copolymers exhibit complex chromic behavior that is directly associated with the phase transitions of both the soft and hard segment domains.

Descriptors :   *POLYMERS, *BLOCK COPOLYMERS, *ACETYLENE, THERMAL PROPERTIES, MECHANICAL PROPERTIES, PHASE TRANSFORMATIONS, POLYMERIZATION, SEPARATION, ESTERS, SOLID STATE ELECTRONICS, SEGMENTED, URETHANES.

Subject Categories : Polymer Chemistry
      Physical Chemistry
      Optics
      Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE