Synthesis And Application Research Of Terminal Amino Branched Oligomers

As a kind of symmetrical spheroid molecules,branched oligomer has become an important field of polymer research in the 21 st century.Because of its low viscosity,high rheology and other unique chemical characteristics,branched oligomer has been widely studied and used in various fields such as nano-materials,molecular self-assembly system,targeted drugs.In this paper,from the perspective of molecular design by using synthetic and spectral characterization techniques and other means.With organic amines as a branching center,using "divergent method" synthesized the 3 categories of 10 kinds of amino branched oligomer(dendritec,chain spherical and claw).Finally,explored and researched the potential application about the above-mentioned of terminal amino branched oligomer in aspects of oil-field development additives.The detail contents are as follows:With octadecylamine,dodecylamine for molecular kernel,a class of dendritic terminal amino branched compounds(18A1.0G,12A1.0G,18A2.0G,12A2.0G)have been prepared by Mi-chael addition and Amide condensation,the reaction yields are 80% or more.By means of IR,1H NMR,13 C NMR,ESI-MS,the products' functional and structure were characterized and identified in order to verify the synthesized compounds as a target product.Finally,the releva-nt performance indicators of above-mentioned branched compounds as demulsifier are exami-ned.The results show: These kind of branched compounds have potential applications as dem-ulsifier.Under the same conditions,the performance indicators of 12A1.0G,12A2.0G is better than the performance of 18A1.0G,18A2.0G.The minimum surface tension of12A2.0G is 20.9 91mN/m,CMC is 0.575mmol/L.At 50?,the oil-water Interfacial Tension of12A1.0G branc-hed compounds can be achieved 5.4×10-2mN/m.At 60?,its dehydration rate is 90% within 1 20 min,and the oil-water interface is flush,prolapsed water is clear in color.As ethylenediamine for molecular core,1.0G chain spherical branched compound(HD-1.0G)which has no report is successfully prepared.The influence of the species about polymerizetion inhibitor on the yield of 0.5G is studied.Designed the orthogonal experiment and single factor experiments to optimize the reaction conditions,the optimized yield was 92.87%.Branched compounds DEA-1.0G,DBA-1.0G are explored and synthesized,which is made diethan-olamine,di-n-butylamine for molecular cores.Using of IR and ESI-MS,the structure of above products were identified,studied and been attributable to the fragmentation path-way whose main characteristic fragment ions.Finally,examined the performance indicators about abovementioned branched compounds as clay inhibitor.The results show: Being three products,they all have potential applications as a clay inhibitor.The inhibition intenity of the order is HD-1.0G>DEA-1.0G>DBA-1.0G.Added 1%,the inhibitor rate of HD-1.0G is more than 90%.Added3%,its quiescent dissolution rate was only 23.54%.After analysis of compatibility experiment,the above-mentioned branched compounds reflected good compatibility effect.As NH3 for molecular core,by using Michael addition and Hofmann degradation,prepared a class of common metal chelator(Tren).With salicylaldehyde by Schiff Base reaction it was synthesized a class of claw-type Schiff base branched compound(TrenS)which has not been reported.By using Single-crystal X-ray Diffraction techniques,characterized the molecular structure.As Tren for branched center,a kind of claw terminal amino branched compound(Tren1.0G)which has been reported rarely is synthesized.By means of IR,1H NMR,13 C NM R the structure was characterized.Finally,the inhibitor effect of the above-mentioned branched compounds as Ca2+scale inhibitor are examined.The results show that: The above mentioned branched compounds have a certain inhibitor effect.At the same dosage,the order of the effect of inhibitor is Tren1.0G>TrenS>Tren.Wherein Tren 1.0G branched compound was added in 100 mg/L or more,inhibition rate can reach 85%.