| The rapid development of green energy in China is limited,and the existing industrial processes are limited in energy conservation and emission reduction.Therefore,a new low-carbon industrial route is urgently needed.Based on the theory of CCUS,we put forward the environmental friendly industrial development route:the use of hydrogen energy from fossil energy to clean energy,and storing the carbon dioxide into 1,3,5-triazine triol products,which can form route of environmentally friendly energy industry;1,3,5-triazine triols continue to be developed into low-internal triazine polymer materials,replacing some of the high energy-consuming and high-emissions Industrial materials such as electrolytic aluminum,which can form an environmentally friendly material industry route.1,3,5-s-triazine triol(referred to as CA)has stable physical properties and relatively lively chemical properties.It is an important chemical product.The synthesis of 1,3,5-s-triazinetriol by the reaction of CO2 with NH3 can be used as a viable CO2 sequestration and utilization route.Therefore,it is of great significance to explore the reaction products of 1,3,5-s-triazinetriol.In this paper,polymer prepolymers were synthesized using CA and aliphatic polyamines as raw materials,providing experimental basis for exploring the downstream material development of triazine alcohols as a carbon fixation product.This article consists of three parts,one is the condensation reaction of CA and diethylenetriamine,the other is the condensation reaction of CA with triethylenetetramine and tetraethylenepentamine,and the third is performance test of reaction product of 1,3,5-s-triazine triol and aliphatic polyamines.(1)CA and DETA were used as reactants to explore the influence of experimental conditions on the molecular weight of the reaction products.It can be seen that the molecular weight of the reaction product increases as the reaction temperature increases,the complete reaction time is 6 hours,and the reaction molar ratio of CA to DETA is 1:1 and 1:1.5.The molecular weight of the reaction product reaches a maximum.The reaction products were characterized by FT-IR,1H NMR,13C NMR and MS,and confirmed that the two hydroxyl groups of the 1,3,5-triazine ring are replaced by primary amine groups to form a polymeric prepolymer.(2)The reactants were 1,3,5-s-triazine triol and triethylenetetramine and tetraethy lenepentamine.The reaction product of 1,3,5-s-triazinetriol with triethylenetetramine and tetraethylenepentamine and diethylenetriamine formed a series polymer prepolymer products of 3,5-triazine ring and aliphatic polyamines.The reaction products were characterized by FT-IR,1H NMR,13C NMR and MS.Spectroscopic analysis was performed to infer that the hydroxyl groups of the the 1,3,5-s-triazinetriol is replaced by a primary amine group in triethylenetetramine and tetraethylenepentamine,respectively.(3)The reaction product was tested for the pH,solubility in various solvents,thermal stability,and hygroscopicity of the aqueous solution.The reaction product of CA and DETA is weakly acidic.As the amine chain lengthens,the basicity of the reaction product increases.The reaction products of CA with TETA and TEPA are slightly alkaline.The solubility of CA and aliphatic polyamines in organic solvents is relatively low,and their solubility in deionized aqueous solutions is relatively high.As the temperature increases,the solubility increases.With the same terpolymer,the CA and TEPA have higher solubility.The thermal stability of the reaction product of a CA with an aliphatic polyamine is lower than the thermal stability of the CA.The thermal stability of the reaction product of CA with DETA increases with increasing molecular weight.In the case of a terpolymer,the thermal stability of the product increases as the amine chain increases.The hygroscopicity of the 1,3,5-s-triazine triol and the aliphatic polyamine reaction product did not show a regular change,and the water absorption in air was about 3%. |
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