Synthesis and curing properties of bisphenol A-type phthalonitrile resin
Bisphenol A-type phthalonitrile resin was synthesized by using bisphenol A and 4-nitrophthalic acid as raw materials.Then,the structure of the synthesized resin was characterized by Fourier transform infrared spectroscopy(FT-IR)and nuclear magnetic resonance hydrogen spectroscopy(1H-NMR).Transition metal salts,aromatic diamines,organic phenols,and other curing agents were screened by using bisphenol A-type phthalonitrile resin as the matrix.The curing behavior of ZnCl2,DBTDL,m-BAPS,DDM,4,4'-biphenol,and various composite curing agents on the resin was studied by differential scanning calorimeter(DSC).The research results showed that,(1)The target product,bisphenol A-type phthalimide resin monomer was successfully synthesized.(2)In the combination of composite curing agents,the inorganic metal salt/organic amine composite curing agent composed of ZnCl2 and DDM had higher curing reaction activity,followed by the inorganic metal salt/organic phenol composite curing agent composed of ZnCl2 and 4,4'-biphenol,and the organic metal salt/organic phenol composite curing agent composed of DBTDL and 4,4'-biphenol.The organic metal salt/organic amine composite curing agent composed of DBTDL and DDM and the organic amine/organic phenol composite curing agent composed of DDM/4,4'-biphenol had relatively weaker curing activity.(3)Comparing various representative catalysts,curing agents and their composite curing agents,transition metal salt catalysts and their composite curing agents represented by inorganic metal salts had the highest curing reaction activity,followed by organic amines,and organic phenols and their composite curing agents had relatively lower reaction activity.
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维普
