To meet the processing requirements of resin transfer moulding(RTM)technology,reactive diluent containing m-phenylene moiety was synthesized to physically mixed with phenylethynyl terminated cooligoimides with well-de...To meet the processing requirements of resin transfer moulding(RTM)technology,reactive diluent containing m-phenylene moiety was synthesized to physically mixed with phenylethynyl terminated cooligoimides with well-designed molecular weights of 1500-2500 g/mol derived from 4,4’-(hexafluoroisopropylidene)diphthalic anhydride(6 FDA),3,4’-oxydianiline(3,4’-ODA)and m-phenylenediamine(m-PDA).This blend shows low minimum melting viscosity(<1 Pa·s)and enlarged processing temperature window(260–361℃).FPI-R-1 stays below 1 Pa·s for2 h at 270℃.The relationship between the molecular weight of the blend and its melting stability was first explored.Blending oligoimides with lower molecular weights exhibit better melting stability.Upon curing at 380℃for 2 h,the thermosetting polyimide resin demonstrates superior heat resistance(T_(g)=420-426℃).展开更多
This paper designed and synthesized a series of different chain length of phthalonitrile-terminated oligo （phthalazinone imide）, it has good water solubility, and can be under normal atmospheric pressure to form the...This paper designed and synthesized a series of different chain length of phthalonitrile-terminated oligo （phthalazinone imide）, it has good water solubility, and can be under normal atmospheric pressure to form the s-triazine rings-containing thermosetting oligo （phthalazine imide）. Compared with the traditional thermosetting resin, the resin has the advantages of high temperature resistance, high strength, flame retardant, resistance to chemical corrosion.展开更多
基金financially supported by the National Natural Science Foundation of China(No.51803222)Science and Technology Service Network Initiative,Chinese Academy of Sciences。
文摘To meet the processing requirements of resin transfer moulding(RTM)technology,reactive diluent containing m-phenylene moiety was synthesized to physically mixed with phenylethynyl terminated cooligoimides with well-designed molecular weights of 1500-2500 g/mol derived from 4,4’-(hexafluoroisopropylidene)diphthalic anhydride(6 FDA),3,4’-oxydianiline(3,4’-ODA)and m-phenylenediamine(m-PDA).This blend shows low minimum melting viscosity(<1 Pa·s)and enlarged processing temperature window(260–361℃).FPI-R-1 stays below 1 Pa·s for2 h at 270℃.The relationship between the molecular weight of the blend and its melting stability was first explored.Blending oligoimides with lower molecular weights exhibit better melting stability.Upon curing at 380℃for 2 h,the thermosetting polyimide resin demonstrates superior heat resistance(T_(g)=420-426℃).
文摘This paper designed and synthesized a series of different chain length of phthalonitrile-terminated oligo （phthalazinone imide）, it has good water solubility, and can be under normal atmospheric pressure to form the s-triazine rings-containing thermosetting oligo （phthalazine imide）. Compared with the traditional thermosetting resin, the resin has the advantages of high temperature resistance, high strength, flame retardant, resistance to chemical corrosion.
