Synthesis of Well-Defined Phema Linear Polymers and Phema- g-Pla Brush Polymers
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The overall objective of the thesis research is to synthesize well-defined brush polymers. The research efforts were focused on the development of innovatively designed synthetic route to exert precise control of the molecular structure and morphology of the brush polymers. To achieve the low molecular weight dispersity (D) of the final brush polymers, grafting-from strategy is selected for the preparation of brush polymers. Because the recent development of Cu(0)-mediated radical polymerization technique allows the preparation of well-defined poly(2-hydroxyethyl methacrylate) (PHEMA) which possess pendent hydroxyl groups capable of initiating ring-opening polymerization (ROP) of cyclic monomers such as lactide, PHEMA synthesized by Cu(0)-mediated radical polymerization is selected as the backbone precursor polymer and ROP is chosen as the polymerization technique for the preparation of grafts via grafting-from. Eventually, well-defined PHEMA linear polymers and PHEMA- g -PLA brush polymers have been developed with the achievement of narrow molecular weight dispersity. These PHEMA- g -PLA brush polymers have the potential to serve as nanostructural building units to construct superstructured polymer materials.