ACTA

Free Volume in Epoxy-Coal Resins Studied by Positron Annihilation

A. Baranowski^a, M. Dębowska^a, K. Jerie^a, L. Kurzeja^b, K. Hennek^b and J. Rudzińska-Girulska^a
^aInstitute of Experimental Physics, University of Wrocław, Maxa Borna 9, 50-204 Wrocław, Poland
^bInstitute of Coal Chemistry PAN, Sowińskiego 62, 44-100 Gliwice, Poland

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In this paper the macroscopic properties of the tetrafunctional epoxy resin (N, N'-tetraglycidyl ether of diaminodiphenylmethane) cured by 4, 4'-diaminodiphenylmethane, were studied. For the system the influence of various curing conditions on the glass temperature was investigated. Results obtained for two compositions: an unmodified one and a modified with coal were compared with information on the free volume given by the positron annihilation technique.

DOI: 10.12693/APhysPolA.88.43
PACS numbers: 71.60.+z, 78.70.Bj, 81.20.Sh, 82.30.Hk