The reaction mechanism of curing epoxy resin with imidazole curing agent
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Last Update: 2020-03-25
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Source: Internet
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Author: User
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There are 1-secondary amine nitrogen atom and 3-tertiary amine nitrogen atom in the molecular structure of imidazole curing agent When curing the epoxy resin, it is generally believed that the 3-position nitrogen atom on imidazole ring first makes the epoxy group ring opening in the epoxy resin, when there is hydrogen atom on 1-position nitrogen atom, hydrogen transfer occurs, and then 1-position nitrogen atom reacts with the epoxy resin to form 1:2 addition product; When there are substituents on the 1-n atom, the 1-n atom does not react with the epoxy resin, only the 3-N atom makes the epoxy group in the epoxy resin open to form a 1:1 addition product In the above two cases, the oxygen anion produced by the final ring opening of epoxy group continues to catalyze the ring opening polymerization of epoxy resin The curing mechanism of imidazole epoxy resin curing agent is as follows: [upload = GIF] / crowd / UploadFile / 2007-6 / 20076110361470501 GIF [/ upload]“
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