Synthesis Of Organic/inorganic Hybrid Materials Via A Combination Of Living "controlling" Polymerization And Click Chemistry

Click chemistry is a sort of high-efficient modular and specific reactions which is represented by Cu-catalyzed Husigen 1,3-dipolar cycloaadition. With click chemistry, we can get two different molecular (include large bio-moleculars and special groups) linked together quickly and effectively. Thus, click chemistry has drawn the attention of researchers in pharmaceutical chemistry and bio-chemistry field. In recent years , click reactions have converged into a powerful tool set for materials scientists because of their high yields , high selectivity , and exceptional tolerance towards a wide range of functional groups and reaction conditions. In the past years, there are several kinds of famous systems and methods in the living control polymerization include initiator-transfer agent-terminator (Iniferter), stable free radical-mediated polymerization(SFRP), atom transfer radical polymerization(ATRP) and reversible addition and fragmentation chain transfer radical polymerization(RAFT) and much attention has been focused on ATRP. Recent publications on click chemistry demonstrated that Husigen 1,3-dipolar cycloaadition can be efficiently used for functionalizing polymers prepared using ATRP. Nevertheless, the range of possibilities of ATRP can be further broadened by CuAAC. The steel structure is one of the most important structural configuration in building industry, the corrosion of the steel structure bring great damage for building industry. Water-soluble anti-rust paint is one of the most enconomical and sound way in the steel structural corrosion, people increasingly pay attention to the environment problem, water-soluble anti-rust paint avoid the pollution of solvent volatilization. In this dissertation, a series of the well-defined organic/inorganic hybrid materials were synthesized via a combination of controlled radical polymerization (CRP) and click chemistry. At the same time, new types of water-borne rust-based anti-rusting coating which was prepared by PVDC as fill forming matter was developed in this paper. The dissertation includes the following two parts:First, the study of synthesis organic/inorganic hybrid materials via the combination of the controlled radical polymerization and click chemistry. 1. In this research, we reported that the Cu(I)-catalyzed [3+2]-cycloaddition of azide end–functional polymers to functional alkynes is an easy versatile method for the preparation of various end-functional polymers on nanoparticles surface, and a series of the transformation of the chain ends of nanoparticles surface into the essential functionalities (e.g.,ω-hydroxy,ω-amino,ω-carboxyl andω-(meth)acrylates ) was synthesized through a combination of surface-initiated ATRP and click chemistry. This method provided opportunities for grafting a dense layer of hydrophilic or hydrophobic polymer brushes onto the nanoparticles surface, and the bromine-terminated polymers isolated after ATRP were transformed to azido end group and subsequently reacted in situ with alkyne-functionalized groups, and these groups of the chain ends can serve as reactive sites for further functionalization with target agents.2. Poly(ε-caprolactone)@attapulgite nanocomposites based onε-CL were prepared after the surface modification of attapulgite by controlled ring-opening polymerization (CROP) and click chemistry. This method provides opportunities for grafting a dense layer of hydrophilic polymer brushes onto the attapulgite surface, and the -OH terminal groups of the PCL can serve as reactive sites for further functionalization with target agents. Successful grafting was determined by FT-IR, XPS, TEM and TGA.Second, the study of new water-borne rust-based anti-rust paintThis study with the reserch excellence water-sulble anti-rust for purpose, analyse the original material function and chose suitable paint and auxiliary, and research the influence of the film material, inhibitor and film forming auxiliary, to establish the technics of the paint and the proportionment of the original material, and contrast with the existing paint. The paint not only have penetrability characteristic, but also have conversion characteristic.