Appropriately crosslinked biodegradable polyester-amides random block copolymer
A technology of biodegradation and polyester amide, applied in the field of polyester amide polymer materials, can solve the problems of insufficient biodegradation performance, insufficient degradation performance and slow reaction speed of polyester amide, and achieve good biodegradation performance and degradation performance. Good, improve the effect of processing performance
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Embodiment 1
[0031] At room temperature, add 174g dimethyl adipate, 194g dimethyl terephthalate, 120g 1,4-butanediol, 40.7g ethanolamine, 340mg tetrabutyl titanate, 5g antioxidant 1010 into the nitrogen inlet , a stirrer, and a four-necked flask with a condenser, feed nitrogen gas, raise the temperature to 140-160° C., and stir for 1-3 hours to react. Then slowly reduce the pressure, and gradually increase the temperature to 220-260°C, control the vacuum degree within 200Pa, and react for 3-6 hours. Then add 78.1 g of tung oil anhydride to the reaction system, maintain the reaction temperature at 120-200° C., and react for another 0.5-2 hours. The obtained product is white, the molecular weight Mw measured by GPC method is 91,500, and the molecular weight distribution is 6.57.
Embodiment 2
[0033] At room temperature, add 174g dimethyl adipate, 194g dimethyl terephthalate, 153g 1,4 butanediol, 18.3g ethanolamine, 340mg tetrabutyl titanate, 5g antioxidant 1010 into the nitrogen inlet , a stirrer, and a four-necked flask with a condenser, feed nitrogen gas, raise the temperature to 140-160° C., and stir for 1-3 hours to react. Then slowly reduce the pressure, and gradually increase the temperature to 220-260°C, control the vacuum degree within 200Pa, and react for 3-6 hours. Then add 78.1 g of tung oil anhydride to the reaction system, maintain the reaction temperature at 120-200° C., and react for another 0.5-2 hours. The obtained product is light yellow, the molecular weight Mw measured by GPC method is 96,300, and the molecular weight distribution is 5.16.
Embodiment 3
[0035]At room temperature, 146g dimethyl succinate, 194g dimethyl terephthalate, 108g 1,4-butanediol, 63.6g diethylene glycol, 23.2g hexamethylenediamine, 340mg tetrabutyl titanate, 5g anti Oxygen agent 1010 is sequentially added to a four-neck flask equipped with a nitrogen inlet, a stirrer, and a condenser, nitrogen is passed through, the temperature is raised to 140-160°C, and the reaction is stirred for 1-3 hours. Then slowly reduce the pressure, and gradually increase the temperature to 220-260°C, control the vacuum degree within 200Pa, and react for 3-6 hours. Then add 78.1 g of tung oil anhydride to the reaction system, maintain the reaction temperature at 120-200° C., and react for another 0.5-2 hours. The obtained product is white, the molecular weight Mw determined by GPC method is 87,900, and the molecular weight distribution is 6.21.
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