A kind of preparation method of fully biodegradable copolyester
A copolyester and all-biological technology, applied in the field of fully biodegradable copolyester preparation, can solve the problems of tensile yield strength, tear resistance and poor light transmission performance, achieve strong light transmission performance and ensure production rate , the effect of strong fracture resistance
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Embodiment 1
[0028] This embodiment provides a kind of preparation method of fully biodegradable copolyester, and specific preparation comprises the following steps:
[0029] (1) Terephthalic acid with a molar ratio of 1:1 and 1,4-butanediol are catalyzed by ethylene glycol titanium with a mass fraction of 0.3‰, under a nitrogen atmosphere and at a reaction temperature of 230°C for esterification The reaction is carried out for 2 hours, and the by-product water is continuously discharged during the reaction process. When the esterification rate reaches 99%, the reaction is terminated to obtain the esterified product A;
[0030] (2) Take adipic acid with a molar ratio of 1:1 and 1,4-butanediol to carry out esterification reaction under nitrogen atmosphere at a reaction temperature of 200°C, and react for 2 hours. During the reaction process, the by-product water is continuously discharged. When the esterification rate reaches more than 85%, the reaction is terminated to obtain esterified pr...
Embodiment 2
[0033] This embodiment provides a kind of preparation method of fully biodegradable copolyester, and specific preparation comprises the following steps:
[0034] (1) Terephthalic acid with a molar ratio of 1:2 and 1,4-butanediol were catalyzed by ethylene glycol titanium with a mass fraction of 1‰, under a nitrogen atmosphere and at a reaction temperature of 230°C for esterification The reaction is carried out for 2 hours, and the by-product water is continuously discharged during the reaction process. When the esterification rate reaches 99%, the reaction is terminated to obtain the esterified product A;
[0035] (2) Take adipic acid with a molar ratio of 1:2 and 1,4-butanediol to carry out esterification reaction under nitrogen atmosphere at a reaction temperature of 200°C, and react for 2 hours. During the reaction process, the by-product water is continuously discharged. When the esterification rate reaches more than 85%, the reaction is terminated to obtain esterified pro...
Embodiment 3
[0038] This embodiment provides a kind of preparation method of fully biodegradable copolyester, and specific preparation comprises the following steps:
[0039] (1) Take isophthalic acid and 1,10-decanediol with a molar ratio of 1:1 under the catalysis of tetrapropyl titanate with a mass fraction of 1.5‰, under a nitrogen atmosphere and at a reaction temperature of 230°C Esterification reaction, reaction for 2 hours, the by-product water is continuously discharged during the reaction process, and when the esterification rate reaches 99%, the reaction is terminated to obtain esterified product A;
[0040](2) Take adipic acid with a molar ratio of 1:1 and 1,10-decanediol to carry out esterification reaction under a nitrogen atmosphere at a reaction temperature of 200°C, and react for 2 hours, and the by-product water is continuously discharged during the reaction process. When the esterification rate reaches more than 85%, the reaction is terminated to obtain esterified product...
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Abstract
Description
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Application Information
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