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A kind of star polyester compound and preparation method thereof

A compound and polyester technology, applied in the field of polymer materials, can solve problems such as high crystallinity and high bulk viscosity, and achieve the effects of convenient and practical operation, cheap and easy-to-obtain raw materials, and good practical value

Active Publication Date: 2020-11-20
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, common linear polyester materials have disadvantages such as high bulk viscosity and high crystallinity.

Method used

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  • A kind of star polyester compound and preparation method thereof
  • A kind of star polyester compound and preparation method thereof
  • A kind of star polyester compound and preparation method thereof

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preparation example Construction

[0015] The embodiment of the present invention provides a kind of preparation method of star polyester compound, it comprises:

[0016] The sugar molecule is used as a chain transfer center, the sugar molecule is mixed with a cyclic ester monomer, and a ring-opening polymerization reaction occurs under the catalysis of an organic metal catalyst.

[0017] Macromolecules with topological structures such as dendritic, comb-shaped, hyperbranched, star-shaped, and H-shaped branched chain structures and ring-shaped topological polymers are of great significance in the fields of material modification, nanotechnology and biomedicine. New functional polymers with important application prospects have been paid more and more attention by people. However, due to the cumbersome preparation process of polymers with topological structures, its research progress is greatly limited. The preparation method provided by the embodiment of the present invention uses cheap and easy-to-obtain sugar ...

Embodiment 1

[0053] This embodiment provides a kind of star polyester compound, and its preparation method is as follows:

[0054] S1. At room temperature, add 20 μmol of metal catalyst 1 (stannous octanoate), 20 μmol of chain transfer agent (glucose), and 2000 μmol of cyclic ester monomer (L-propane) to 25 ml of anhydrous and anaerobic-treated polymerization bottle. lactide). At 120°C, the reaction was stirred for 30 minutes.

[0055] S2. After adding 0.5 vol% hydrochloric acid to acidify THF to dissolve, settle in industrial ethanol.

[0056] S3. The solid component obtained by settling is dried in a vacuum oven for 48h to obtain the required star-shaped polyester compound (2.68g, conversion rate 93.0%, M n = 11,000, M w / M n = 1.40).

Embodiment 2

[0058] This embodiment provides a kind of star polyester compound, and its preparation method is as follows:

[0059] S1. At room temperature, add 20 μmol metal catalyst 1 (stannous octanoate), 20 μmol chain transfer agent (β-cyclodextrin), and 2000 μmol cyclic ester monomer to a 25 ml anhydrous and anaerobic-treated polymerization bottle (L-lactide). At 140°C, the reaction was stirred for 30 minutes.

[0060] S2. After adding 0.5 vol% hydrochloric acid to acidify THF to dissolve, settle in industrial ethanol.

[0061] S3. The solid component obtained by settling is dried in a vacuum oven for 48h to obtain the required star-shaped polyester compound (2.75g, conversion rate 95.5%, M n = 13,000, M w / M n = 1.07).

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Abstract

The invention relates to a star-shaped polyester compound and a preparation method thereof, which relate to the field of polymer materials. The preparation method is characterized by adopting chondroitin sulfate proteoglycans as a chain transfer center, carrying out ring-opening polymerization reaction on a cyclic ester monomer under the catalysis of an organic metal catalyst, and thus high-efficiently obtaining the polyester compound with a star-shaped topology structure with a high conversion rate. The preparation method is cheap and easy-to-get in raw materials, convenient and practical inoperation, and suitable for large-scale industrial production. The length of a branch chain of the star-shaped polyester compound can be controlled through adjusting a feeding ratio, so that a betterpractical value is achieved. According to the star-shaped polyester compound prepared by adopting the preparation method of the star-shaped polyester compound, the hydrophily is increased, the mechanical property is improved, the molecular weight is controllable, and the star-shaped polyester compound can be used as a raw material of a macromolecule drug carrying microsphere so as to have a greatapplication prospect.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a star-shaped polyester compound and a preparation method thereof. Background technique [0002] The "Immortal" ring-opening polymerization process of cyclic ester monomers is a rapid exchange between the chain transfer agent small molecule alcohol (ROH) and the growing chain, and finally forms a large number of dormant polymers ending with alcoholic hydroxyl groups (such as lactide polymerization Adding chain transfer agent: RO-PLA-OH) and growing polymer chain (LMOPLA-OR) (L = ligand, M = metal catalytic center) rapid exchange alternate growth polymerization system. Compared with the traditional living polymerization system, one catalyst molecule only initiates the growth of one polymer chain, in the "Immortal" polymerization system, one catalytic center can obtain multiple polymerization growth chains. This will greatly reduce the amount of catalyst used, save the cost of cat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/78C08G63/08
CPCC08G63/08C08G63/78
Inventor 王玲芳张雅恒郑雪琴陆琛谢正斌吕凯
Owner YANCHENG INST OF TECH
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