Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Star-shaped polyester compound and preparation method thereof

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

Active Publication Date: 2018-06-08
YANCHENG INST OF TECH
View PDF3 Cites 2 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Star-shaped polyester compound and preparation method thereof
  • Star-shaped polyester compound and preparation method thereof
  • Star-shaped polyester compound and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

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).

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com