Accession Number : AD0477260


Title :   PHOSPHIMIDAZOLENE POLYMERS.


Descriptive Note : Rept. for 1 Apr 62-31 Dec 64,


Corporate Author : DIRECTORATE OF MATERIALS AND STRUCTURES RESEARCH AND DEVELOPMENT (GT BRIT)


Personal Author(s) : Twaits,R


Report Date : Oct 1965


Pagination or Media Count : 23


Abstract : Simple low molecular weight model compounds containing the phosphimidazolene were prepared from o-diamines and phosphorus dichlorides or diamides. Attempts to prepare polymers containing this ring structure, either by linking together preformed rings or by a simultaneous ring closure polymerization reaction between an aromatic tetra-amine and a bis(phosphonic dichloride), or a bis(phosphonic diamide), gave incomplete reactions and cross-linking. The polymers obtained were in general brittle infusible solids and hydrolytically unstable. The preparation of some new diphosphorus compounds is described. (Author)


Descriptors :   *HEAT RESISTANT PLASTICS , *PHOSPHORUS HETEROCYCLIC COMPOUNDS , SYNTHESIS(CHEMISTRY) , SYNTHESIS(CHEMISTRY) , POLYMERS , POLYMERIZATION , AROMATIC COMPOUNDS , CROSSLINKING(CHEMISTRY) , THERMAL STABILITY , PHOSPHONIC ACIDS , ESTERS , CHLORIDES , AMIDES , MECHANICAL PROPERTIES , BRITTLENESS , UNITED KINGDOM


Subject Categories : Polymer Chemistry
      Plastics


Distribution Statement : APPROVED FOR PUBLIC RELEASE