Accession Number : ADA267320


Title :   The Photochemistry of Poly(methylphenylphosphazene)


Descriptive Note : Technical rept. no. 20,


Corporate Author : UNIVERSITY OF SOUTHERN MISSISSIPPI HATTIESBURG DEPT OF POLYMER SCIENCE


Personal Author(s) : Hoyle, C E ; Creed, D ; Subramanian, P ; Rufus, I B ; Chatterton, P


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a267320.pdf


Report Date : 13 Jul 1993


Pagination or Media Count : 26


Abstract : The photochemical reactions of poly(methylphenyl-phosphazene) (PMPP), a disubstituted poly(phosphazene), have been studied. UV-Irradiation results in chain scission in air-saturated dichloromethane solution, whereas in the absence of molecular oxygen, a bimolecular process, leading to extensive crosslinking and gel formation, predominates. The degradation of PMPP is not inhibited by quenchers of the triplet state. The reactions of PMPP most likely originate from the singlet state. Biphenyl has been identified as a major photoproduct from PMPP both in the presence and absence of molecular oxygen.


Descriptors :   *PHOTOCHEMICAL REACTIONS , *POLYMERS , *PHOSPHAZENE , DEGRADATION , QUENCHING , OXYGEN , CHAINS , IRRADIATION , GELS , PHOSPHORUS HETEROCYCLIC COMPOUNDS , CHLOROMETHANES , NITROGEN HETEROCYCLIC COMPOUNDS , BIPHENYL , ULTRAVIOLET SPECTRA , PHENYL RADICALS , MOLECULAR STRUCTURE , CROSSLINKING(CHEMISTRY) , SATURATION , METHYL RADICALS , AIR


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


Distribution Statement : APPROVED FOR PUBLIC RELEASE