Preparation method of polylactic acid-polyetheretherketone (PPEK) segmented copolymer
A polyetheretherketone and copolymer technology, which is applied in the field of preparation of polylactic acid block copolymers, can solve the problems of less research on PEEK copolymers, and achieve the effects of low cost, improved heat resistance and simple process
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[0023] A preparation method of polylactic acid-polyetheretherketone segment copolymer, the preparation method comprising the following steps:
[0024] 1. Add the solvent, monomer A, monomer B or the mixture of B, and carbonate into the reaction kettle, pass nitrogen to remove oxygen until the oxygen content is less than 5ppm, raise the temperature to 140°C for 1 hour, 180°C for 1 hour, and 220°C Reaction 2h, obtains PEEK prepolymer;
[0025] 2. Add L-lactide and catalyst into the reaction kettle through a sealed solid feeder, stir for 1-5 hours, stop, discharge and cool to room temperature;
[0026] 3. Pulverize the cooled material, wash it, and dry it under vacuum at 100°C to obtain polylactic acid-polyether ether ketone segment copolymer;
[0027] The solvent is one or more of diphenyl sulfone, sulfolane, and diphenyl ether; the monomer A is 4,4'-difluorobenzophenone; the monomer B is hydroquinone, Or a mixture of hydroquinone and bisphenol A, 4,4'-diphenol, 4,4'-dihydroxy...
example 1
[0039] Example 1 The diphenyl sulfone of 246.3g, the difluorobenzophenone of 109.1g, the hydroquinone of 55.1g, the Na of 26.5g 2 CO 3 and 34.6 g of K 2 CO 3 Add it to the stainless steel reaction kettle, feed N 2 Replace O in the kettle 2 , to the reactor O 2 The content is lower than 5ppm, and the temperature is raised to 140°C, the reaction system is light yellow and translucent, stirred at 150rpm for 1h, heated to 180°C, continued to stir for 1h, continued to heat up to 220°C, stirred at 300rpm for 2h.
[0040] The L-lactide of 131.4g, the stannous octoate of 0.4g are packed into the sealed feeder, pass into N 2 replace the O 2 , and then added to the reactor, continue to stir the reaction for 4h, stop stirring. Keep the temperature at 200-220°C and discharge to a stainless steel tray, cool to room temperature to obtain block solid. First use a crusher for crushing, and then crush it with a mechanical crusher. The powder was successively washed twice with acetone,...
example 2
[0041] Example 2 The diphenyl sulfone of 492.6g, the difluorobenzophenone of 109.1g, the hydroquinone of 60.6g, the Na of 32.1g 2 CO 3 and 41.8g of K 2 CO 3 Add it to the stainless steel reaction kettle, feed N 2 Replace O in the kettle 2 , to the reactor O 2 The content is lower than 5ppm, and the temperature is raised to 140°C, the reaction system is light yellow and translucent, stirred at 150rpm for 1h, heated to 180°C, continued to stir for 1h, continued to heat up to 220°C, stirred at 300rpm for 2h.
[0042] Put 656.8g of L-lactide and 5.3g of aluminum isopropoxide into the sealed feeder, and feed N 2 replace the O 2 , and then added to the reactor, continue to stir the reaction for 4h, stop stirring. Keep the temperature at 200-220°C and discharge to a stainless steel tray, cool to room temperature to obtain block solid. First use a crusher for crushing, and then crush it with a mechanical crusher. The powder was successively washed twice with acetone, twice wi...
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