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8392484 
Meetings & Symposia 
ESM method and Laplace transform of Klafter-Blumen equation for DET analysis in polymer blend like materials 
Pekcan, O 
1993 
1 
Materials Research Society Symposium Proceedings
ISSN: 0272-9172
EISSN: 1946-4274 
Publ by Materials Research Society 
Boston, MA, USA 
Proceedings of the Second Symposium on Dynamics in Small Confining Systems 
290 
221-226 
English 
Fluorescence decay curves from particles composed of poly(vinyl acetate) (PVAc) and naphthalene (N) labelled poly (2-ethylhexyl methacrylate) (PEHMA) were analyzed for Direct Energy Transfer (DET) from N to anthracene by the exponential series method (ESM). An averaged apparent dimension of d = 2.0 were observed. The Laplace transformed Klafter-Blumen (KB) equation for the lifetime distribution was used to interpret these dimensions. Additional fluorescence experiments were carried out on Polymer films composed of the same material above. Exposure of the films to a pentane solution of 9-anthrylmethyl pivalete (AMP) transferred the AMP molecules exclusively to the PEHMA phase of the material. ESM analysis together with transformed KB equation showed that PEHMA thread has a unique dimension of 1.3 in PVAc matrix of this polymer film.