Synthesis Of Amphiphilic Block Copolymer Via Ring-Opening Metathesis Polymerization

Macromolecular materials now have become the necessities of industry, agriculture and ordinary life. Look back the evolution history of polymer science over the past century; we can see that the synthesis methods and its application of macromolecular chemistry played an important role in the development of the polymer science. Also, it accelerated the extensive application of macromolecular materials, and leaded the modern society into the period of synthesized materials.Along with the development of polymer science, material science and molecular biological science etc. in the past decade, we can clearly see that, the potential applications of macromolecular materials have gained more attention, and many research departments have already devoted plenty of money on it. Development and application of living polymerization, allow preparation of controlled polymers and nanostructure materials. Exploitation and application of new living polymerization will become future trend in macromolecular field,In the past decades, ring-opening metathesis polymerization (ROMP) has evolved into a valuable tool for the polymer synthesis. Although it is a relatively new player on the field of polymer chemistry, ROMP has emerged as a powerful and broadly applicable method for synthesizing macromolecular materials. The origins of ROMP can be traced to the mid-1950s. However, the rapid rise in popularity and utility of this polymerization technique is the result of extensive work on the identification and isolation of key intermediates involved in the general olefin metathesis reaction. This led to the development of well-defined ROMP catalysts and ultimately enabled the synthesis of a wide range of polymers with complex architectures and useful functions. In particular, along with the synthesis of well-defined, stable and high-efficient catalysts, the reaction in temperate condition was carried out. This will give this method new vigor.In this paper, ROMP of (N-propyl-norbornene-exo-2,3-dicarboximide) catalyzed by Grubbs 1st catalyst was carried out. The molecular weight and molecular weight distribution of this reaction can be controlled. Here we synthesized a CTA (Z-1, 2-(oxiran-2-ylmethoxy) ethane), and used it to end the ROMP reaction.In this paper, we synthesized a monomer which took Di-tert-butyl as protection group. Then, we obtained polymer via ROMP. We worked over molecular weight and PDI of these polymers, and its deprotection reaction . We obtained block copolymer via ROMP with this monomer and (N-propyl- norbornene-exo-2,3- dicarboximide). We researched the effects of adding order of two monomers to the molecular weight and PDI, and illustrated that it was caused by the steric hindrance of this protection group. After the deprotection of the block copolymer, we got the amphiphilic block copolymer. We used these copolymers to research their self-assembly action。...