| The materials obtained by the reaction between soybean oil epoxy curing agent and epoxy resin has a good performance,which also has a very excellent adhesive strength,good dielectric properties,low shrinkage,good products dimensional stability,high hardness,alkali-resisting and solvent resistance.Thus it was widely used in casting material,impregnated material,laminated materials,adhesives,coatings,et al.In this paper,epoxy soybean oil was reacted with three different multiple amines and the amino group were grafted to the molecular chain of soybean oil.The new type of epoxy curing agent was odorless,non-toxic and biodegradable.The thesis was divided into three parts.In the first part,the chemical structures of the epoxy soybean oil based-epoxy curing agent were characterized by Fourier transform infrared(FTIR),Nuclear magnetic vibration spectrum of hydrogen(1H-NMR)and liquid chromatography-mass spectrometry techniques(LC-MS).And the reaction heat of curing reactions with epoxy resin E-51 were researched by Differential scanning calorimetry(DSC).The results show that,soybean oil epoxy curing agent SOEA,SOMPA and SOMXA have good reactivity.In the second part,the relationship between the lap shear strength and the ratio of the SOEA of the epoxy resin was explored.The difference of thermal stability between the SP0.9 and AEEA/GDEBA were researched by thermo gravimetric analysis(TG);the morphology of brittle fractures surface of the SP0.9 and AEEA/GDEBA were observed by scanning electron microscopy(SEM);The dynamic mechanical properties of the SOEA curing agent of various contents have been studied to analyse the storage modulus and tan delta by using dynamic mechanical analyzer(DMA).In the third part,the synthetic soybean oil-based epoxy curing agent SOMPA and SOMXA was applied to soybean oil-based plastics and the affect of the content of curing agent for the hardness,the tensile strength and the elongation at break of soybean oil-based epoxy plastic were explored.The difference of thermal stability between the SPP1.1 and SPX1.1 were researched by thermo gravimetric analysis(TG).The morphology of brittle fractures surface of the SPP1.1 and SPX1.1 were observed by scanning electron microscopy(SEM). |
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