Akademik Veri Yönetim Sistemi
EUROPEAN POLYMER JOURNAL, cilt.61, ss.240-252, 2014 (SCI-Expanded)
A series of hydroxyl-terminated octa-armed star-shaped poly(epsilon-caprolactone)s (8SPCL1-3, represented as 5, 6 and 7, respectively) with an initiator core of 2,3,9,10,16,17,23,24-octakis(3-hydroxypropylmercapto)phthalocyaninatozinc(II) (4) was synthesized by the ring-opening polymerization of epsilon-caprolactone using tin(II) 2-ethylhexanoate as the catalyst. The obtained star-shaped polymers were characterized by FT-IR, H-1 NMR, GPC and UV-vis spectroscopy. The measured intrinsic viscosities of all polymers were used to calculate the number-average molecular weight. The fluorescence of polymers 5-7 was studied. The changes in the visible spectra of 7 were investigated by increasing the concentration and adding methanol and cations such as Ag+, Hg2+, or Pb2+. The electrical conductivities of the polymers measured in vacuum and in air were between similar to 10(-9) and 10(-6) S m(-1). DSC and polarized optical microscopy techniques were used to evaluate the crystalline behavior of 5-7. The thermal stability of 5-7 was investigated by TGA. (C) 2014 Elsevier Ltd. All rights reserved.