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High molecular weight polyester based on biomass as monomer, preparation method and use thereof

A high molecular weight, biomass technology, applied in the field of two-step reaction of catalytic polycondensation, can solve the problems that are difficult to meet the material properties, mechanical properties, poor processability, low melting point, etc., to achieve improved mechanical properties, excellent mechanical properties and thermal properties, The effect of low raw material cost

Active Publication Date: 2019-02-01
临沂斯科瑞聚氨酯材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Existing aliphatic polyesters have problems such as low melting point, poor mechanical properties and processing properties, and it is difficult to meet the various requirements for material properties in practical applications.

Method used

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  • High molecular weight polyester based on biomass as monomer, preparation method and use thereof
  • High molecular weight polyester based on biomass as monomer, preparation method and use thereof
  • High molecular weight polyester based on biomass as monomer, preparation method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: 5.084g (20 mmol) of 2,5-dimethoxy dimethyl terephthalate, 1.862g (30 mmol) of 1,2-ethanediol and 0.017 g (0.1 mmol) of p-toluenesulfonic acid, under nitrogen atmosphere, under normal pressure, under the condition of magnetic stirring at 150°C, carry out the transesterification reaction for 3 hours to obtain the transesterified product; Under the condition of magnetic stirring at 250°C, the polycondensation reaction was carried out for 3 hours to obtain crude polyester; 50 mL of chloroform was added to the crude polyester, soaked for 3 hours and then filtered; the clear liquid was added dropwise to methanol to obtain a turbid system, which was centrifuged to obtain a precipitate. Filter, then wash with 10 mL of methanol, filter, and dry under vacuum at 60°C to obtain 5.022 g of polyester P 1 , and the yield was 89.59%.

[0028] For determining the polyester P prepared in this embodiment 1 structure, molecular weight and thermal properties, adopt Bruker Avanc...

Embodiment 2

[0034] Example 2: 5.084g (20 mmol) of 2,5-dimethoxy dimethyl terephthalate, 4.387g (30 mmol) of 1,8-octanediol and 0.034 g (0.1 mmol) of tetrabutyl titanate was transesterified for 3 hours under nitrogen atmosphere, normal pressure, and magnetic stirring at 150°C to obtain the transesterified product; , under the condition of magnetic stirring at 250 ℃ for 3 hours, the polyester crude product was obtained; 50mL chloroform was added to the polyester crude product, soaked for 3 hours and then filtered; the clear liquid was added dropwise to methanol to obtain a turbid system, and a precipitate was obtained after centrifugation , filtered, and then washed with 10 mL of methanol, filtered, and vacuum-dried at 60 ° C to obtain 6.634 g of polyester P 2 , the yield is 91.01%.

Embodiment 3

[0035] Example 3: 5.084g (20 mmol) of 2,5-dimethoxy dimethyl terephthalate, 2.859g (28 mmol) of 1,3-cyclopentanediol and 0.03 g (0.1 mmol) of antimony trioxide was transesterified for 3 hours under a nitrogen atmosphere, normal pressure, and magnetic stirring at 150°C to obtain a transesterified product; , under the condition of magnetic stirring at 250 ℃ for 3 hours, the polyester crude product was obtained; 50mL chloroform was added to the polyester crude product, soaked for 3 hours and then filtered; the clear liquid was added dropwise to methanol to obtain a turbid system, and a precipitate was obtained after centrifugation , filtered, and then washed with 10 mL of methanol, filtered, and vacuum-dried at 60 ° C to obtain 5.699 g of polyester P 3 , and the yield was 88.96%.

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Abstract

The present invention discloses a high molecular weight polyester based on biomass as a monomer, a preparation method and a use thereof, and belongs to the field of polyester synthesis. A monomer of 2,5-dimethoxyterephthalate dimethyl ester and diol, and a catalyst are heated to 120 DEG C-180 DEG C under a protection of nitrogen for atmospheric pressure transesterification for 2 h-4 h to obtain atransesterification product; the transesterification product is heated to 220 DEG C to 250 DEG C under a high vacuum of less than 20 Pa for a polycondensation reaction for 2 h-4 h to obtain a polyester crude product; and finally, solvent extraction, precipitant precipitation, filtration, and drying are carried out to obtain the target product: high molecular weight polyester. The polyester obtained by the method has a weight-average molecular weight (Mw) value of 110,000-150,000 Da, and a molecular weight distribution Mw / Mn value of 1.7-2.2. The synthesized polyester has a high molecular weight, a high heat performance, good mechanical properties and other characteristics. The prepared high molecular weight polyester based on the biomass can be used as a main component of bottle-level polyester material processing and can also be used as a component raw material for preparation of other polyester processing materials.

Description

technical field [0001] The invention relates to a high-molecular-weight polyester based on biomass as a monomer and a preparation method, in particular to 2,5-dimethoxy dimethyl terephthalate and diol as raw materials, through catalyzed transesterification A two-step reaction with catalytic polycondensation to prepare a high-molecular-weight polyester based on biomass as a monomer belongs to the field of polyester synthesis, and in particular relates to a high-molecular-weight polyester based on biomass as a monomer, a preparation method and an application. Background technique [0002] Due to its light weight, low price, good performance and easy processing, polyester materials are widely used in food, chemical industry, construction, automobile, medicine, agriculture, packaging industry and electronics. The daily consumption of synthetic polyester materials is huge, some of which are not degradable, and the problem of "white pollution" is becoming more and more serious due...

Claims

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Application Information

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IPC IPC(8): C08G63/672C08G63/78C08L67/02
CPCC08G63/672C08G63/78C08L67/02C08L2203/18
Inventor 程正载刘盼盼曾胜胡海李光要王涵鼎颜晓潮马里奥·高斯尔
Owner 临沂斯科瑞聚氨酯材料有限公司
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