| This work was financially supported by the national high technology and development program (No.2003AA33G030) and the national army corps program.This work focused on preparing a novel high temperature resistant insulating lacquer and coatings on the basis of poly(phthalazinone ether sulfone ketone) (PPESK) and poly(phthalazinone ether nitrile ketone) (PPENK), which were deeply exploited by our laboratory. Thus, a variety of effects on properties of poly(phthalazinone ether)s insulating lacquer and coatings were deeply investigated, expecially the ralationship of structure and property, which could be an instruction for the future application.The lacquer's prescription and procedure were optimized. The optimum solvent component was confirmed in accordance with PPESK's solubility parameter, solvent boiling point and poison. Three kinds of couplants, KH-560, KH-550, KH-590, were selected to detect their effects on the properties of lacquer film, with the result of KH-560 which could enhance the film's adhesion to metal and decrease its water absorption. Another crucial factor was polymer's high weight molecule which could be detected through polymer's intrinsic viscosity and solution's flowing viscosity. The results indicated that the lacquer's mechanical properties were excellent, which showed one grade adhesion to metal, 1mm flexibility and 50cm impact resistance,, when the intrinsic viscosity was more than 0.50 dL/g. T-4 viscosity, used to describe flowing viscosity, increased with the increasing of intrinsic viscosity and concentration of solution.The structure of polymer main chain also had impact on the properties of resulting lacquer film. The result showed that the most excellent mechnical properties of film can be obtained when the ratio of sulfone and ketone of PPESK was more than 8 to 2. The PPENK lacquer embodied the more perfect mechancial properties by virtue of introducing -CN group improving the film's adhesion.The research also demonstrated that the contain of sulfone, ketone, nitrile and ether group in the polymer chain affacted the properties of the resulting film.The high temperature resistant enamel wires were manufactured with the conventional wire coating process, and the affected factors were discussed. It was proved that if the enamel machine's baker temperature increased suitably, it can improve the breakdown voltage. If the enamel machine's drawing speed decreased suitably, it can improve the wire's continuity.Compared to the properties of PPESK and PPENK and PPENKK wire, the PPENK wire's properties were excellent. According to the conventional PI enamel round copper wire standard, the properties of Poly(phthalazinone ether )s wires, which exhibit good thermal, electrical and chemical properties, were superior to those of PI. The PPENK wire which showed the thermal shock of 470℃ has the best heat resistant property up to now.The effects of PPESK anti-corrosion coating's prescription and fabricating procedure of coating on properties were deeply investigated, too. The effects of dispersant and dispersing process on storing time were discussed. The results showed that BYK-P104S as a dispersant can markedly improve the dispersing properties of the black carbon. The congest paint storing time could be found when dispersing time and rotating speed were 3 hour and 2000r/min, respectively. The anti-heating and anti-corrosion properties of PPESK coatings were tested. The results showed that the PPESK coatings could be used at 250℃, and endure 15% hydrochloric acid and 30% sodium hydroxide solution's corrosion for more than sixty days.BYK-370 was the excellent additive for the PPESK anti-adhesive coating's dispersing. CGUF-006 polytetrafluoroethylene was the best stuffing for anti-adhesive coating. The combination of molybdenum disulfide (M0S2) and graphite was observed to best coating's luster.phthalazinone(DHPZ) and 4,4'-dihydroxy diphenylsulphone(BPS) were selected as monomers to synthesize novel PPESK resin. The intrinsic viscosity of resin and heat resistance of coating decreased with the increasing of BPS percent.Whereas the wire can be used above high glass transition temperature(Tg) for a long time, the crosslinking behaviors of PPENK and PPESK coatings were investigated with Flourier transformed infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA), initially. The results indicated that the nature of the curing reaction is complex. When the PPENK coating was heated at 290℃ and 330℃, respectively, two weak absorption peaks centered about 1780 cm-1 and 1730cm-1 appeared and grew in intensity with the increasing of crosslinking temperature and time. Thermogravimetric analysis (TGA) was performed to do further research. Thermal degradation temperature increased with the increasing of heating time and temperature. The PPESK coating had the samely changes. The catalyst of p-toluenesulfonate acid contributed to the crosslinking of PPENK and PPESK coatings.
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