Preparation method of 1,8-naphthalic anhydride modified poly(propylene carbonate)

[0016] A 500mL high-pressure reactor was used as the reaction vessel, and the reactor was vacuum-dried at 80°C for 8 hours and purged with carbon dioxide. After cooling to room temperature, 1,8-naphthalene anhydride with a mass ratio of 0.6% was added, and the newly prepared rare earth three The primary catalyst and propylene oxide (PO), which accounted for 99.4% by mass, were filled with carbon dioxide, the pressure was kept at about 3.5MPa, the set temperature was 70°C, the speed was 250r / min, and the reaction was carried out for 10 hours. The reaction was stopped and the remaining gas was discharged. After the product was removed, it was washed with 5% hydrochloric acid ethanol solution to precipitate the polymer, washed 3 times with absolute ethanol, and vacuum-dried at 45°C to constant weight to obtain a copolymer.

[0018] A 500mL high-pressure reactor was used as the reaction vessel. The reactor was vacuum-dried at 80°C for 8 hours and purged with carbon dioxide. After cooling to room temperature, 1,8-naphthalene anhydride with a mass ratio of 1% was added, and the newly prepared rare earth three The primary catalyst and propylene oxide (PO), which accounted for 99% by mass, were charged with carbon dioxide, the pressure was kept at about 3.5MPa, the set temperature was 70°C, the speed was 250r / min, and the reaction was carried out for 10 hours. The reaction was stopped and the remaining gas was discharged. After the product was removed, it was washed with 5% hydrochloric acid ethanol solution to precipitate the polymer, washed 3 times with absolute ethanol, and vacuum-dried at 45°C to constant weight to obtain a copolymer.

[0020] A 500mL high-pressure reactor was used as the reaction vessel, and the reactor was vacuum-dried at 80°C for 8 hours and purged with carbon dioxide. After cooling to room temperature, 1,8-naphthalene anhydride with a mass ratio of 2% was added, and the newly prepared rare earth three The primary catalyst and propylene oxide (PO), which accounted for 98% by mass, were filled with carbon dioxide, the pressure was kept at about 3.5MPa, the set temperature was 70°C, the speed was 250r / min, and the reaction was carried out for 10 hours. The reaction was stopped and the remaining gas was discharged. After the product was removed, it was washed with 5% hydrochloric acid ethanol solution to precipitate the polymer, washed 3 times with absolute ethanol, and vacuum-dried at 45°C to constant weight to obtain a copolymer.