Characterization of Star-shaped marcomolecules with calix[8]arene core by Differential Scanning Calorimetry (DSC)

Abstract

This thesis was written to analysis thermal behavior of oligomer and their star-shaped macromolecules by Differential Scanning Calorimetry (DSC) and Polarized Optical Microscope (POM) methods. The thermal properties of these substances were detected by glass transition, endotherm or exotherm peaks. Amphiphilic oligomer, brij 58, and its star-shaped block copolymer showed glass transition at very low temperature and crystalline peak in heat flux curves. On the other hand, thermo-responsive oligomer, 2-isopropyl-2-oxazoline-(CH2)10COOC2H5, and its copolymer behaved as amorphous macromolecule which just displayed glass transition in DSC experimental curves. Then, all substances were observed by POM associated with a hot-stage component to detect crystalline in the studied substance.

This thesis was conducted at Laboratory of Polymer Chemistry of Department of Chemistry, University of Helsinki as a project work.