Biodegradable aliphatic-aromatic copolyester composition and application thereof
A biodegradable and aliphatic technology, applied in the field of polyester composition, can solve the problems of reduced heat preservation, moisturizing effect, puncture, insufficient tear resistance, etc., so as to reduce the probability of puncture and prevent puncture. , the effect of reducing the water vapor transmission rate
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[0052] Example A1
[0053] Put 8.73 Kg of dimethyl terephthalate and 9 Kg of 1,4-butanediol into the reactor, replace the air in the reactor with nitrogen, and then raise the temperature to 170°C. After melting, 10 g of isopropyl titanate was added, and the temperature was gradually raised to 180°C for esterification reaction. After the methanol leached out reaches the theoretical amount, add 7.96 Kg of adipic acid and 142 g of dodecenyl succinic acid, continue the reaction until the leaching water reaches the theoretical amount, add 10 g of isopropyl titanate, and gradually increase the temperature to 230~ Reduce the pressure in the reactor to below 60 Pa at 250°C for about 30 minutes, and continue the reaction under this condition until the power of the stirring motor reaches the set value. The reactor is filled with high-purity nitrogen, the melt is extruded through the mouth mould, and then stretched and pelletized to obtain the aliphatic-aromatic copolyester containing alk...
Example Embodiment
[0054] Example A2
[0055] Put 11.64Kg of dimethyl terephthalate, 9Kg of 1,4-butanediol, 5.40Kg of adipic acid, and 630g of octenyl succinic anhydride into the reactor, and gradually increase the temperature to 170 o C. Add 20g of n-butyl titanate, and gradually increase the temperature to 230~250 after the methanol and water have reached the theoretical amount. o C. Reduce the pressure in the reactor to below 60 Pa in about 30 minutes, and continue the reaction under this condition until the power of the stirring motor reaches the set value; fill the reactor with high-purity nitrogen, press out the melt through the mouth, and then pull it Copolyester base material A20 is obtained by strip and pelletizing; after drying A20, it is mixed with 0.6% hexamethylene diisocyanate and reacted in a twin-screw extruder, and pelletized to obtain an aliphatic group containing alkyl side chains -Aromatic copolyester.
[0056] Change the ratio of aromatic dibasic acid, aliphatic dibasic acid and...
Example
[0060] Examples 1~9 and Comparative Examples 1~4:
[0061] Mix the alkyl / alkoxy side chain aliphatic-aromatic copolyester A, polylactic acid and the compatibilizer as the compatibilizer in the high-mixer according to the ratio of Table 2 In the twin screw extruder, between 170~220 o C extrusion granulation to obtain a biodegradable aliphatic-aromatic copolyester composition.
[0062] Table 2 Proportion of biodegradable aliphatic-aromatic copolyester composition P
[0063]
[0064] Table 3 Performance test results of biodegradable aliphatic-aromatic copolyester composition P
[0065]
[0066] It can be seen from Table 2 and Table 3 that, due to the addition of a specific ratio of alkyl / alkoxy side chain aliphatic dibasic acid ester units, the film made by biodegrading aliphatic-aromatic copolyester composition The yield strength is improved, which is beneficial to improve the puncture performance of agricultural mulching film tolerant to crops and weeds, and reduce the probability of...
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