Preparation of high molecular weight poly(butylene succinate)

A technology of polybutylene succinate and high molecular weight, which is applied in the field of preparation of high molecular weight polybutylene succinate, can solve the problems of poor color phase and low molecular weight of polybutylene succinate, etc. Achieve the effect of increasing molecular weight, avoiding adverse effects, and increasing solubility

Inactive Publication Date: 2008-12-24
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of this invention is to propose a kind of method for preparing high molecular weight polybutylene succinate aim

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Put succinic acid and 1,4-butanediol with a molar ratio of 1:1.1 into a 250ml flask, and add catalyst cerium sulfate and ethylene glycol antimony at the same time, the addition of the two is respectively the amount of succinic acid substance 0.2%. Connect the water separator, thermometer and stirrer, then place in a heating mantle, fill with nitrogen, heat and stir vigorously. When the temperature reached 150°C, it was held for 1.5 hours. After the esterification reaction was completed, the temperature was raised to 230° C., the vacuum was maintained at 60 Pa, and the stirring was strengthened at the same time, and the reaction was carried out for 3 hours. After the reaction, the product was poured into a dumbbell-shaped mold to prepare a sample for mechanical testing, or it was dissolved in chloroform and then precipitated with methanol for other testing.

[0026] The weight-average molecular weight of the measured polymer is 5.6×10 4 , its breaking strength is 35MP...

Embodiment 2

[0028] Put succinic acid and 1,4-butanediol in a molar ratio of 1:1.1 into a 250ml flask, and simultaneously add catalyst ammonium cerium sulfate and ethylene glycol antimony, and the addition amount of the two is the amount of succinic acid substance respectively 0.01%. Connect the water separator, thermometer and stirrer, then place in a heating mantle, fill with nitrogen, heat and stir vigorously. Hold for 1 hour when the temperature reaches 160°C. After the esterification reaction was completed, the temperature was raised to 230° C., the vacuum was kept at 10 Pa, and the stirring was strengthened at the same time, and the reaction was carried out for 3.5 hours. After the reaction, the product was poured into a dumbbell-shaped mold to prepare a sample for mechanical testing, or it was dissolved in chloroform and then precipitated with methanol for other testing.

[0029] The weight-average molecular weight of the measured polymer is 12.2×10 4 , the breaking strength is 4...

Embodiment 3

[0031] Put succinic acid and 1,4-butanediol with a molar ratio of 1:2 into a 250ml flask, and simultaneously add catalyst cerium ammonium nitrate and ethylene glycol antimony, and the addition amount of the two is the amount of succinic acid substance respectively 1%. Connect the water separator, thermometer and stirrer, then place in a heating mantle, fill with nitrogen, heat and stir vigorously. Hold for 1 hour when the temperature reaches 160°C. After the esterification reaction was completed, the temperature was raised to 230° C., a vacuum of 70 Pa was maintained, and stirring was strengthened at the same time, and the reaction was carried out for 3 hours. After the reaction, the product was poured into a dumbbell-shaped mold to prepare a sample for mechanical testing, or it was dissolved in chloroform and then precipitated with methanol for other testing.

[0032] The weight-average molecular weight of the measured polymer is 5.6×10 4 , its breaking strength is 35MPa, ...

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Abstract

The invention relates to a method for preparing high molecular weight poly(butylenes succinate), which is characterized in that: the method adopts a cerium salt-ethylene glycol antimony binary catalytic system and solves the problems that the poly (butylenes succinate) in the prior art has low molecular weight and poor hue and so on. The prepared poly(butylenes succinate) has high molecular weight, good color and luster, and good mechanical property, improves the output and the quality of polyester products, decreases the content of stibium in the polyester products, and improves the post-processing spinnability. The weight average molecular weight of the poly(butylenes succinate) prepared by the method can reach between 5.6x10<4> and 12.5x10<4>, the rupture strength is between 35 and 55MPa, and the breaking elongation rate is between 200 and 420 percent. The method can ensure that the whole synthesis period is shortened, thereby reducing cost.

Description

technical field [0001] The invention belongs to the technical field of preparation of aliphatic polyester, in particular to a preparation method of high molecular weight polybutylene succinate. Background technique [0002] Plastics are widely used in various fields due to their excellent properties, but waste plastics are difficult to decompose in nature, and the disposal of waste plastics has become a major social problem. In order to solve the problem of waste plastics, degradable plastics have attracted much attention. With the improvement and strictness of environmental protection regulations, it is foreseeable that the use of degradable plastics will be more actively promoted in the future. There are many types of degradable plastics, among which biodegradable plastics occupy the main share. Biodegradable plastics have the same function as ordinary plastics, but the former can be decomposed into water and carbon dioxide by microorganisms in nature after being discarde...

Claims

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Application Information

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IPC IPC(8): C08G63/82C08G63/16
Inventor 王军李振江姜岷韦萍
Owner NANJING UNIV OF TECH
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