Method for preparing high polymer material by alpha-angelica lactone ring-opening polymerization

A polymer material, Angelica lactone technology, applied in the field of polymer synthesis, to achieve the effect of high molecular weight, high atom economy, easy to degrade

Inactive Publication Date: 2010-07-07
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the five-membered ring monomer polyester has not yet been reported in the world

Method used

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  • Method for preparing high polymer material by alpha-angelica lactone ring-opening polymerization
  • Method for preparing high polymer material by alpha-angelica lactone ring-opening polymerization
  • Method for preparing high polymer material by alpha-angelica lactone ring-opening polymerization

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Under the protection of high-purity nitrogen, add 4.90g of α-angelica lactone and stannous octoate with a molar ratio of 1:10000 to α-angelica lactone to the reaction flask, heat the oil bath to 200°C, take out the reaction for 2h, cool, add 10ml of ethanol, small molecules were dissolved in ethanol, high polymer was precipitated in methanol, filtered and dried to obtain solid poly-angelica lactone. The molecular weight of the polymer measured by gel permeation chromatography was 15.0×10 4 , the molecular weight distribution is 1.26.

Embodiment 2

[0030] Under the protection of high-purity carbon dioxide, add 7.84g of α-angelica lactone and aluminum triisopropoxide with a molar ratio of 1:8000 to α-angelica lactone to the reaction flask, heat the oil bath to 180°C, and take it out after 6 hours of reaction. After cooling, 15ml of methanol was added, the small molecules were dissolved in methanol, and the high polymer was precipitated in petroleum ether, filtered and dried to obtain solid poly-angelica lactone. The molecular weight of the polymer measured by gel permeation chromatography was 14.6×10 4 , the molecular weight distribution is 1.24.

Embodiment 3

[0032] Under the protection of high-purity nitrogen, add 10mL α-angelica lactone (10.84g) and 30mL tetrahydrofuran to the reaction flask, then add tetraphenyltin with a molar ratio of α-angelica lactone of 1:6000, and heat the oil bath to 160°C, react for 10 hours, take it out, cool, add 30ml of ethanol, dissolve the small molecule substance and reaction solvent in ethanol, and precipitate the high polymer in ethanol, filter and dry to obtain solid poly-angelica lactone. The molecular weight of the polymer measured by gel permeation chromatography was 13.9×10 4 , the molecular weight distribution is 1.20.

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Abstract

The invention relates to a method for preparing high polymer material by alpha-angelica lactone ring-opening polymerization; under the anhydrous and oxygen-free condition, catalyst and alpha-angelica lactone are mixed according to 1:20-10000 of the molar ratio, so as to obtain mixture; or the alpha-angelica lactone and solvent are mixed according to 1:0.5-3 of volume ratio, so as to obtain mixed liquid; the catalyst is added in the mixed liquid according to 1:20-10000 of mole ratio of the catalyst and the angelica lactone, so as to obtain the mixture; the mixture is heated to 50-220 DEG C, and the reaction is carried out for 0.5-36 hours, the reaction products are cooled to obtain the polymerization product, micromolecule compounds in the polymerization product are removed by dissolving, precipitating and separating, so as to obtain the polymer product. The polymer molecular weight is high, the molecular weight distribution is narrow, and the polymerization method is green and environmental-protection.

Description

technical field [0001] The invention relates to a polymer material obtained by ring-opening polymerization of α-angelica lactone and a preparation method thereof, belonging to the field of polymer synthesis. Background technique [0002] Aliphatic polyesters prepared by ring-opening polymerization of lactone compounds have been widely used because of their good biocompatibility, biodegradability and bioabsorbability. It has been reported in the literature that three-membered ring, four-membered ring, and six-membered ring lactones can undergo ring-opening polymerization to form polymer polyesters, while saturated five-membered ring lactones are relatively stable in thermodynamics due to too small tension in the ring, and cannot undergo ring-opening polymerization alone . Therefore, the five-membered ring monomer polyester has not been reported in the world yet. Invention content: [0003] The purpose of the present invention is to provide a preparation method of a polyme...

Claims

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Application Information

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IPC IPC(8): C08G63/08
Inventor 侯相林陈铁牛邓天昇
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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