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A kind of biodegradable alternating aromatic polyester amide and preparation method thereof

An aromatic amide diol, polyester amide technology, applied in the field of biodegradable alternating aromatic polyester amide and its preparation, can solve the problems of poor thermal properties, low molecular weight, poor mechanical properties and the like

Active Publication Date: 2021-07-06
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a biodegradable alternating aromatic polyester amide and a preparation method thereof, aiming to solve the problems of low molecular weight, poor thermal performance and poor mechanical properties of the biodegradable alternating polyester amide in the prior art

Method used

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  • A kind of biodegradable alternating aromatic polyester amide and preparation method thereof
  • A kind of biodegradable alternating aromatic polyester amide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A preparation method of biodegradable alternating aromatic polyester amide, the specific steps are as follows:

[0053] (1) The preparation process of the aromatic amide diol is as follows: under nitrogen protection and a temperature of 120° C., dimethyl terephthalate and aminoethanol are mixed and reacted for 5 hours to obtain the aromatic amide diol;

[0054] (2) Under nitrogen protection and a temperature of 160°C, mix aromatic amide diol, adipic acid, stannous chloride and diammonium hydrogen phosphate, and react for 3 hours; wherein, aromatic amide diol and adipic diol The molar ratio of acid is 1:1, the mass of stannous chloride is 0.05% of the total mass of aromatic amide diol and adipic acid, and the quality of diammonium hydrogen phosphate is 0.05% of the total mass of aromatic amide diol and adipic acid. 0.05%;

[0055] (3) Under the temperature condition of 180°C, after reducing the pressure to 200Pa, continue the reaction for 3h to obtain the prepolymer;

...

Embodiment 2

[0067] A preparation method of biodegradable alternating aromatic polyester amide, the specific steps are as follows:

[0068] (1) The preparation process of aromatic amide diol is as follows: under nitrogen protection and a temperature of 120° C., dimethyl terephthalate and 3-amino-1-propanol are mixed and reacted for 5 hours to obtain aromatic amide diol;

[0069] (2) Under nitrogen protection and a temperature of 165°C, mix aromatic amide diol, adipic acid, stannous chloride and diammonium hydrogen phosphate, and react for 3 hours; wherein, aromatic amide diol and adipic diol The molar ratio of acid is 1:1, the mass of stannous chloride is 0.05% of the total mass of aromatic amide diol and adipic acid, and the quality of diammonium hydrogen phosphate is 0.05% of the total mass of aromatic amide diol and adipic acid. 0.05%;

[0070] (3) Under the temperature condition of 175°C, after reducing the pressure to 200Pa, continue the reaction for 3h to obtain the prepolymer;

[...

Embodiment 3

[0074] A preparation method of biodegradable alternating aromatic polyester amide, the specific steps are as follows:

[0075](1) The preparation process of the aromatic amide diol is as follows: under nitrogen protection and a temperature of 120° C., dimethyl terephthalate and aminoethanol are mixed and reacted for 5 hours to obtain the aromatic amide diol;

[0076] (2) Under nitrogen protection and a temperature of 220°C, mix aromatic amide diol, succinic acid, stannous octoate and diammonium hydrogen phosphate evenly, and react for 3 hours; among them, aromatic amide diol and succinic acid The molar ratio is 1:1, the mass of stannous octoate is 0.01% of the total mass of aromatic amide diol and succinic acid, and the quality of diammonium hydrogen phosphate is 0.05% of the total mass of aromatic amide diol and succinic acid ;

[0077] (3) Under the temperature condition of 220°C, after reducing the pressure to 100Pa, continue the reaction for 3h to obtain the prepolymer; ...

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Abstract

The invention relates to a biodegradable alternating type aromatic polyester amide and a preparation method thereof. The preparation method is as follows: under the action of a catalyst and a phosphorus-containing co-catalyst, polycondensation of an aromatic amide diol and a straight-chain aliphatic diacid is carried out. The biodegradable alternating aromatic polyester amide is prepared by the reaction, wherein the phosphorus-containing cocatalyst is an ammonium salt containing hydrogen phosphate, a calcium salt containing hydrogen phosphate, a sodium salt containing hydrogen phosphate or a magnesium salt containing hydrogen phosphate; The main chain of the obtained biodegradable alternating aromatic polyester amide is composed of aromatic amide diol units and straight-chain aliphatic diacid units alternately bonded, and the weight average molecular weight of the biodegradable alternating aromatic polyester amide is 3000~100000g / mol. The preparation method of the invention has the advantages of simple operation, no pollution and few by-products, and the finally prepared biodegradable alternating aromatic polyester amide has good biodegradation performance, regular alternating structure, high molecular weight, thermal and mechanical properties. good.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a biodegradable alternating aromatic polyester amide and a preparation method thereof. Background technique [0002] With the enhancement of people's awareness of environmental protection and the increasing concern for environmental issues, more and more researchers have focused their attention on the development of new biodegradable polymers. Polybutylene succinate (PBS), polyhydroxybutyrate-hydroxyvalerate (PHBV) and polylactic acid (PLA) are currently the most typical biodegradable polymers, which have been industrialized and used in daily plastic products, packaging Some applications have been obtained in materials and medical products, but there are problems such as high price, poor heat resistance, poor mechanical properties, obvious decrease in molecular weight and deterioration of physical properties during storage. Polyesteramide is a kind of polymer compound co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/44
CPCC08G69/44
Inventor 何廷伟何勇马博谋周亮王学利俞建勇
Owner DONGHUA UNIV
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