Positron Annihilation Studies of Styrene-N-X-Phenylmaleimides |
| A. Baranowski, M. Dębowska, K. Jerie, J. Rudzińska-Girulska Institute of Experimental Physics, Wrocław University, Maxa Borna 9, 50-204 Wrocław, Poland Z. Pawełka Institute of Chemistry, Wrocław University, Joliot Curie 14, 50-383 Wrocław, Poland and R.T. Sikorski Institute of Organic and Polymer Technology, Technical University of Wrocław, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland |
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| Results of angular correlation of annihilation radiation and positron annihilation lifetime measurements are presented for five styrene copolymers: poly(co-styrene-phenylmaleimide) and its three derivatives with chlorine as well as for one with the OH group substituted in the benzene ring. It occurs that the chlorine substituted in three different positions in the benzene ring poly(co-styrene-o (or -m, -p)-chlorophenylmaleimide) inhibits the formation of the positronium to different extent. The greatest effect is observed in case of the chlorine atoms substituted in the benzene ring at ortho-position towards the nitrogen atom. In addition, electric dipole moments were measured for N-X-phenylmaleimide units, to check whether their magnitude influences the positron annihilation parameters. On the basis of the present results no correlation between the positron annihilation parameters and the electric dipole moments of the units was noticed. |
| DOI: 10.12693/APhysPolA.88.51 PACS numbers: 71.60.+z, 78.70.Βj, 81.20.Sh, 82.30.Hk |