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A kind of branched aliphatic polyester and its synthetic method

A technology of aliphatic polyester and synthesis method, applied in the field of branched aliphatic polyester material preparation, achieving the effect of easy price

Active Publication Date: 2015-08-19
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] It is suitable for industrial production, and there is no report on the synthesis method of branched aliphatic polyester at a lower cost

Method used

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  • A kind of branched aliphatic polyester and its synthetic method
  • A kind of branched aliphatic polyester and its synthetic method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Mix 0.4 mol of succinic acid, 0.4356 mol of 1,4-butanediol, and 0.0044 mol of tert-butyl glycidyl ether into the three-neck flask reactor, one of which is protected by a sufficient amount of nitrogen, and the other is connected to a mechanical stirrer. The other port is connected to the water separator and condenser. Heating and stirring slowly at the same time, the temperature was raised to 120°C for 30 minutes at a constant temperature. Then increase the stirring, keep the temperature at 155°C for 1 hour, keep the temperature at 180°C for 1 hour, and raise the temperature to 220°C for 2 hours until no more liquid distills out, and the esterification reaction ends. Lower the temperature of the reaction system to 180°C, stop nitrogen protection, and vacuumize for 10 minutes to remove the residual moisture in the system; then, stop vacuuming, add 0.1% catalyst tetrabutyl titanate, vacuumize to an absolute pressure of 20Pa, and rapidly raise the temperature Reaction at a...

Embodiment 2

[0031] Mix 0.4mol of adipic acid, 0.48mol of 1,6-hexanediol, 0.06mol of n-butyl glycidyl ether, and 0.06mol of 1,2-epoxyhexane into a three-necked flask reactor, one of which is connected to mechanical stirring The other port is connected to the water separator and condenser, and the system is vacuumed to 10kPa. Heating and stirring slowly at the same time, the temperature was raised to 100°C for 1h. Then increase the stirring, keep the temperature at 155°C for 1 hour, keep the temperature at 180°C for 1 hour, raise the temperature to 240°C for 5 hours, until liquid distills out, the esterification reaction ends. Lower the temperature of the reaction system to 180°C, stop the nitrogen protection, and vacuumize for 10 minutes to remove the residual moisture in the system; then, stop the vacuum, add 5% catalyst tetraisopropanol titanate, and vacuum until the absolute pressure is below 100Pa, And quickly raise the temperature to 240°C for 3 hours of constant temperature reaction...

Embodiment 3

[0034] Mix 0.3 mol of succinic acid, 0.1 mol of adipic acid, 0.72 mol of 1,4-butanediol, and 0.08 mol of phenyl glycidyl ether into the three-necked flask reactor, and a sufficient amount of nitrogen gas is injected into one port for protection, and one port Connect to the mechanical stirrer, and the other port to the water separator and condenser. Heating and stirring slowly at the same time, the temperature was raised to 140°C and kept at a constant temperature for 30 minutes. Then increase the stirring, keep the temperature at 155°C for 1 hour, keep the temperature at 180°C for 1 hour, raise the temperature to 240°C for 3 hours, until no more liquid distills out, the esterification reaction ends. Lower the temperature of the reaction system to 180°C, stop the nitrogen protection, and vacuumize for 10 minutes to remove the residual moisture in the system; then, stop the vacuum, add 10% catalyst tetraisopropanol titanate, and add 1% of the total acid content of the reactants ...

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Abstract

The invention discloses branched aliphatic polyester and a synthetic method thereof. The branched aliphatic polyester is polymerized and synthesized by esterifying and vacuum poly-condensing mono-glycidyl ether or a mono-substituted ethylene oxide branched monomer shown as formula (I) with aliphatic dicarboxylic acid and aliphatic glycol. The branched aliphatic polyester is polymerized and prepared with the adoption of a universal esterifying and ester exchanging catalyst in classical polyester preparation process conditions. The polyester prepared is higher in molecular weight and low in terminal carboxyl content.

Description

technical field [0001] The invention belongs to the technical field of preparation of branched aliphatic polyester materials, and in particular relates to a branched aliphatic polyester and a synthesis method thereof. Background technique [0002] Due to its advantages in strength, transparency and ease of use, plastic products have become more and more widely used in packaging, agriculture, construction and various aspects of society. Non-degradable plastic products will remain in the soil when they are landfilled. Some plastic products will also produce harmful gases when they are incinerated, and they will easily cause landscape damage when they are discarded. As environmental issues are increasingly concerned, the application of biodegradable aliphatic polyesters has attracted attention. For example, polybutylene succinate has similar mechanical properties to polyethylene and has high cost performance. It can be used in packaging, tableware, cosmetic bottles, pharmaceut...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/42C08G63/78
Inventor 郭宝华张瑜徐军齐治国刘尊浩
Owner TSINGHUA UNIV
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