INVESTIGATION ON THE PROPERTIES OF POLY (2-HYDROXYETHYL METHACRYLATE -CO- 3,9-DIVINYL-2,4,8,10-TETRAOXASPIRO (5.5) UNDECANE) AS A FUNCTIONAL POLYMERIC SYSTEM

摘要

The aim of this study was to evaluate the physicochemical characteristics of a functional polymeric system based on poly (2-hydroxyethyl methacrylate) and 3, 9-divinyl-2, 4, 8, 10-tetraoxaspiro (5.5) undecane (U), in terms of molecular weight, temperature-sensitive abilities, thermal stability, rheological and dielectrical properties. The dependence of the copolymer particles size versus temperature highlighted the temperature-sensitive ability of the evaluated compound. DSC indicated that the copolymer exhibited a single glass transition temperature (T_g), an endothermic process and two degradation processes. Fluorescence spectroscopy confirmed the presence of the hydrophobic spiroacetal moiety in the copolymer, which confers specific conformational configuration to the copolymer. The dielectric properties of the copolymer have been evaluated in order to investigate the relaxation processes. It was found that the main contribution to dielectric relaxation derived from the non-cooperative motion of side groups only, or parts of them and no contribution from the main chains was noted.