Accession Number : ADA264915


Title :   The Synthesis of Photocrosslinkable Chalcone-Bearing Polyphosphazenes


Descriptive Note : Technical rept.,


Corporate Author : PENNSYLVANIA STATE UNIV UNIVERSITY PARK DEPT OF CHEMISTRY


Personal Author(s) : Allcock, Harry R ; Cameron, Charles G


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a264915.pdf


Report Date : 18 May 1993


Pagination or Media Count : 27


Abstract : Cyclic and high polymeric phosphazenes that bear 3-(4-oxyphenyl)-l- phenyl-2-propen-l-one (4-oxychalcone) side groups have been prepared in order to study their photochemical behavior. Small molecule cyclic trimers of the general formula N3P3R5R' where R= phenoxy, 2,2,2-trifluoroethoxy, chloro and 4- oxychalcone and R'= 4-oxychalcone were synthesized in order to model the crosslinking reactions at the high polymer level. Single-substituent and cosubstituent polymeric phosphazenes NPRR'2n' where R= phenoxy, 2,2,2- trifluoroethoxy or 4-oxychalcone, and R'= 4-oxychalcone were also prepared. Their photolytic crosslinking was followed by ultraviolet spectroscopy.


Descriptors :   *PHOTOCHEMICAL REACTIONS , *POLYMERS , *CROSSLINKING(CHEMISTRY) , MODELS , PHOTOLYSIS , ULTRAVIOLET SPECTROSCOPY , CYCLIC COMPOUNDS , PHOSPHAZENE , PHENYL RADICALS , PROPENES , OXYGEN , MOLECULES , SPECTROSCOPY


Subject Categories : Organic Chemistry
      Radiation and Nuclear Chemistry
      Polymer Chemistry
      Atomic and Molecular Physics and Spectroscopy


Distribution Statement : APPROVED FOR PUBLIC RELEASE