Preparation of acrylic acidmodified epoxy resin and properties of its photothermal dual curing system
The acrylic acid modified epoxy resin AGMA with 50％esterification rate was prepared by partial ring-opening modification using 1,3-bis(N,N-diglycidylaminomethyl)cyclohcxane(AG602)and a-methacrylic acid as raw materials through partial ring opening modification.The successful preparation of AGMA resin was confirmed by the determination of acid value,epoxy value and infrared spectroscopy.Three curing systems of UV curing,thermal curing and photothermal curing were designed to prepare AGMA resin castings.The mechanical properties,thermal mechanical properties,thermal stability and fracture surface morphology of the three curing systems were studied.The results indicated that the UV curing system failed to achieve a certain degree of curing and its performance was poor.The performance of the thermal curing system was much higher than that of the UV curing system in all aspects,but the curing time was longer.The curing time of the photothermal curing system was greatly shortened and the curing process was simple.The comprehensive performance of the casting body was better than that of the thermal curing system.
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