Design, Synthesis and Character Study of Dendritic Acrylic Esters
|School||Daqing Petroleum Institute|
|Keywords||Dendrimer Molecular Design Surfactant Viscosity reducer Viscosity reduction mechanism|
Dendritic macromolecules (dendrimers) are a new class of functional macromolecular compound, it can be characterized at the molecular level, the size, shape, the design of the functional groups of the molecules. According to the characteristics of the dendrimer structure itself, the system to carry out the study of the molecular structure and properties. The developers having the function of the new terminal group macromolecule is an important research directions. Center and the internal of the surface of the terminal group of the dendrimer can be a functional group conversion reported functional group or amino group, a hydroxyl group, a carboxyl group, an ester group, an amide group, and metal chelate; Dendrimer The presence of active sites, in drug delivery, and the catalytic reaction, the gene therapy, the metal nano-composite material and film material, etc., have shown good application prospect. In this thesis a brief introduction in the structure and properties of the dendrimer and dendrimer synthesis and functional aspects of the latest research progress on the basis of a systematic review, a new dendritic big molecular terminal group transformation method, having a functional group is grafted to the dendrimer through the Michael addition reaction, the condensation reaction and amidation by molecular design and synthesis of a series of polyamide - amine dendrimer, Design and the first successful synthesis of a new class of dendritic acrylate ethylenediamine core. By elemental analysis, infrared spectroscopy and nuclear magnetic resonance experiments were used to characterize the structure of the novel dendrimer synthetic dendrimer structure and design of the structure of the target molecule match. This thesis is based on the structural characteristics of the dendrimer, made a preliminary exploration of the performance of the first synthesis of dendrimers. Generation semi polyamide - 12 amine and 0.5 generation dendrimer ester surfactant in acetone by drop volume study focused on the half-generation polyamide - amine and 0.5 generation dendrimer long chain ester at 70 ℃ when heavy oil viscosity reduction effect, these two types of macromolecules in acetone not half-generation polyamide - amine and 0.5-generation dendrimer long chain ester of heavy oil with a viscosity reduction performance, at a concentration of surfactant 0.6% viscosity reduction performance, generation 0.5, 1.5 and 2.5 generation PAMAM reduction rate were 24.5%, 26.0% and 28.2%, respectively the 0.5 generation octyl dodecyl and octadecyl acrylate viscosity reduction rate 26.2%, 28.3% and 32.4%, respectively. Also 1.5-generation dendrimer acrylic long chain ester of heavy oil viscosity reduction performance discussed primarily viscosity reduction in the concentration of 0.6%, the best performance, the viscosity reduction of 30.6%. Dendrimer viscosity reduction performance evaluation, explores the relationship between the viscosity reduction mechanism of the heavy oil viscosity reducer molecular structure to lay the foundation for the design and synthesis of a single new structure of crude oil viscosity reducer. The innovation of this dissertation is the first time Dendrimer applied to Jiangnian field, to broaden the field of application of the new dendrimer.