Iron-contained type load catalyst polymerized by utilizing reverse atom to transfer free radical and its application
A supported catalyst and atom transfer technology, applied in the field of polymer synthesis, can solve problems such as low catalyst residue and difficult separation, and achieve the effects of avoiding separation and processing work, avoiding environmental pollution, and saving energy
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[0019] Example 1
[0020] (1) Preparation of complex support carrier for catalyst. After the cross-linked polyacrylic resin was washed with water, the ion exchange resin was changed from hydrogen form to sodium form through a volume of 3% NaOH solution, then washed with deionized water to pH=9, dried in vacuum at 80°C, and passed through a ball mill Crush and vacuum dry to obtain cross-linked polyacrylic acid ion exchange resin powder PAA(N).
[0021] (2) Preparation of supported catalysts. Dissolve 1 part of ferric chloride in 10 parts of methanol, add 3 parts of cross-linked polyacrylic acid ion exchange resin powder, stir and reflux at 70°C for 3 hours, remove the methanol and vacuum dry to obtain PAA-FeCl 3 Crude. The crude product is eluted with methanol until it is colorless, and PAA-FeCl is prepared after vacuum drying 3 , Which is a catalyst for catalyzing reverse atom transfer radical polymerization.
[0022] (3) Take the azobisisobutyronitrile initiator and the above-men...
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[0023] Example 2
[0024] (1) Preparation of complex support carrier for catalyst. After the cross-linked polyacrylic resin is washed with water, the ion exchange resin is converted from hydrogen form to sodium form through a volume of 2% NaOH solution, and then washed with deionized water to pH=9, dried in vacuum at 80°C, and passed through a ball mill Crush and vacuum dry to obtain cross-linked polyacrylic acid ion exchange resin powder PAA(N).
[0025](2) Preparation of supported catalysts. Dissolve 1 part of ferric chloride in 10 parts of methanol, add 3 parts of cross-linked polyacrylic acid ion exchange resin powder, stir and reflux at 70°C for 3 hours, remove the methanol and vacuum dry to obtain PAA-FeCl 3 Crude. The crude product was eluted with methanol until it was colorless, and then dried in vacuum to obtain PAA-FeCl 3 , Which is a catalyst for catalyzing reverse atom transfer radical polymerization.
[0026] (3) Take the initiator dibenzoyl peroxide and the above-men...
Example Embodiment
[0027] Example 3
[0028] (1) Preparation of complex support carrier for catalyst. After the cross-linked polyacrylic resin is washed with water, the ion exchange resin is changed from hydrogen form to sodium form through a 5% NaOH solution, and then washed with deionized water to pH=9, dried in vacuum at 80°C, and passed through a ball mill Crush and vacuum dry to obtain cross-linked polyacrylic acid ion exchange resin powder PAA(N).
[0029] (2) Preparation of supported catalysts. Dissolve 1 part of iron tribromide in 10 parts of methanol, add 3 parts of cross-linked polyacrylic acid ion exchange resin powder, stir and reflux at 70°C for 3 hours, remove the methanol and vacuum dry to obtain PAA-FeBr 3 Crude. The crude product is eluted with methanol until it is colorless, and then dried under vacuum to obtain PAA-FeBr 3 , Which is a catalyst for catalyzing reverse atom transfer radical polymerization.
[0030] (3) Take the azobisisobutyronitrile initiator and the above-mentioned...
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