Electronic energy transfer in compatible blends of poly(di-n-hexylsilane) and poly(methyl-n-propylsilane)

Authors
Radhakrishnan, J Tanigaki, N Kaito, A
Citation
J. Radhakrishnan et al., Electronic energy transfer in compatible blends of poly(di-n-hexylsilane) and poly(methyl-n-propylsilane), POLYMER, 40(6), 1999, pp. 1381-1388
Citations number
37
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
POLYMER
ISSN journal
00323861 → ACNP
Volume
40
Issue
6
Year of publication
1999
Pages
1381 - 1388
Database
ISI
SICI code
0032-3861(199903)40:6<1381:EETICB>2.0.ZU;2-O
Abstract
Blends of poly(methyl-n-propylsilane) (PMPrS) and poly(di-n-hexylsilane) (P DHS) were prepared in various compositions by solution mixing method. The b lends were studied using differential scanning calorimetry, optical microsc opy, fluorescence and UV spectroscopy. The blend samples were isothermally crystallized at temperatures in which only the PMPrS crystallized. The equi librium melting point of PMPrS was estimated from the Hoffman-Weeks plots. Depression of equilibrium melting point of PMPrS with increasing PDHS conte nt indicated some degree of miscibility. Fluorescence spectroscopic studies indicated that energy transfer occurs form PMPrS to PDHS. Comparison with an immiscible blend showed that energy transfer occurs only in miscible ble nds. Optical microscopy studies using crossed polarizers showed liquid crys talline mesophase in all the blends with PMPrS/PDHS = 90/10-0/100. (C) 1998 Elsevier Science Ltd. All rights reserved.