Synthesis And Characterization Of Different Triamine Ligands And The Relationship Between Their Structures And ATRP Capabilities

The thesis consists of two parts:1. Synthesis and characterization of a novel ligand, N, N, N', N', W-penta (methyl acrylate) diethylenetriamine (MA5-DETA) , also used in the ATRP polymerization. 2.The relationship between of different ligands' structure and ATRP capabilities.1. MA5-DETA was synthesized by the reaction of diethylenetriamine with methyl acrylate in almost quantitive yield. The polymerizations of methyl methacrylate (MMA) with MA5-DETA as the ligand, a, a-dichlorotoluene(DCT) and ethyl 2-bromoiso- butyrate (2-EBiB) as the initiators, respectively, under the different conditions were studied in detail. The polymerization using CuCl/MA5-DETA/DCT was closely controlled in bulk and gave the polymer with quite narrow molecular weight distributions (Mw/Mn's) of 1.16-1.29. The polymerization with the system CuBr/MA5-DETA/EBiB in bulk gave high activity. However, the system is not well controlled and gave the polymers with Mw/Mn=1.35-1.53. The solution polymerization in anisole with CuBr/MA5-DETA/EBiB shows better-controlled nature. Moreover, the addition of CuBr2 into the above system can further improve its controllability. The Mw/Mn's of the resulting polymers ranged from 1.11 to 1.21.2.Considering DETA have five living H and the MA5-DETA is a good ligand, so we synthesized different quantity methylacrylate of diethylenetriamine as a research system. We studied the relationship between of different ligands' structure and ATRP capabilities.