Accession Number : AD0770314

Title :   Block Copolymers of Polycarbonates with Several Hydroxy-Terminated Elastomers to Yield Thermoplastic Elastomers for Higher Service Temperature,

Corporate Author : TORONTO UNIV (ONTARIO) DEPT OF CHEMICAL ENGINEERING AND APPLIED CHEMISTRY

Personal Author(s) : Memon,Nazir A. ; Williams,H. Leverne

Report Date : 12 SEP 1972

Pagination or Media Count : 17

Abstract : The synthesis of block copolymers and the study of their morphology were undertaken to find improved thermoplastic rubbers for service at elevated temperatures. In these systems it has been well established that the unusual properties are a result of domain formation in which the hard and the soft blocks aggregate separately into distinct phases. Block copolymers were synthesized with different soft and hard segments. The effects of these segments and of their properties on the morphology and the stress-strain properties of the block copolymers were measured and evaluated. (Modified author abstract)

Descriptors :   *Block copolymers, *Elastomers, Morphology, Stress strain relations, Mechanical properties, Birefringence, Thermoplastic resins, Crosslinking(Chemistry), Electron microscopy, Phase transformations, Tensile properties, Canada

Subject Categories : Polymer Chemistry
      Elastomers and Rubber

Distribution Statement : APPROVED FOR PUBLIC RELEASE