| Polyamide6(PA6) was widely applied because of excellent properties such as high mechanical intensity and good toughness. It was well-known that it easily formed hydrogen bonds between the acyl of PA6and water molecule, So it had weak hygroscopic properties and bad dimensional stability, which limited the application range of PA6. In order to solve them, many researchers at home and abroad carried through a series of enhanced intensity and toughness modification researches and exploiture, but the development of the hydrophobic properties was less researched.polyhedral oligomeric silsesquioxane cages (POSS) was made up of inorganic framework with three-dimensional Si-O chain and organic substituent group covered with it. The bond energy of Si-O(450KJ/mol) far bigger than that of C-C, and so POSS has high density inorganic core with high temperature tolerance and excellent hydrophobic properties, can control polymer chain and be favor to enhance the mechanical properties and so on of he polymers; The organic substituent groups and macromolecule chain endue materials excellent toughness and machinability, thus POSS has the characters of both organic polymer and inorganic compounds.PA6/octaphenyl-polyhedral oligomeric silsesquioxane cages (OPS) composites was prepared via molten blending, and the performances of the composites were researched as well by means of Scanning Electron Microscope(SEM), Polarizing Microscope(PLM), Differential Scanning Calorimeter(DSC) and X-ray Diffractometer(XRD) and so on. The results showed that the mechanical and hydrophobic properties of composites were improved at the loading of2%OPS. The OPS particles made a nucleating role in the PA6matrix.With the development of the technology of oil extraction, the quantities and species of surfactants were gradually increased and then the compose of crude oil become more complex. In addition, the content of gelatine and asphaltum increased, and the content of water and salts of the crude oil extracted in the oil field. All of these composites made the crude oil emulsion stabler. The used demulsifiers were not competent for the job, we all expect new novel demulsifiers to solve the problems.Comb polymer surfactants were one of hot researches recently. It was better than normal polymer surfactants in decreasing surface tension; and more effective to diffuse in the crude oil than solid multi-branch structure polymer demulsifiers used to demulsification. What’s more, it has higher molecular weight than normal polyether blocks, it can bridge and joint the droplets in the emulsion in the crude oil, and make the droplets gradually combine in order to separate the oil-water.A comb-configuration polymer demulsifier was synthesized with acrylic acid and polyethers as raw materials, designed two synthesis routines. The first routine:the acrylic acid and polyethers were esterifed in the presence of catalyst, stabilizer and water entraining agent and obtained the composite with double bonds; and then the esterified composite and acrylic acid copolymerized in the role of initiator. The second routine:The acrylic acid was polymerized firstly and then esterified with polyether. The synthesis conditions of the two routines were compared respectively.The result showed that the copolymerization of the first routine was unstable and easily gelled. Compared at the same conditions, the second synthesis routine was easier than the first one, controlled easily and had synthesized polymer demulsifier with excellent demulsifying effect, The dehydration quantity of some productions exceeded that of the foreign production RP6294. The dehydration quantity in the15min arrived or exceeded15ml. |
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