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Preparation method of organic silicone modified polyglycollide

A polyglycolide and silicone technology, applied in the direction of additive processing, can solve the problems of poor thermal stability and poor toughness, and achieve the effects of good heat resistance, improved physical and chemical properties, and good impact resistance

Inactive Publication Date: 2018-03-27
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at overcoming the problems of strong brittleness, poor toughness and poor thermal stability of polyglycolide materials in the prior art, and provides a preparation method based on organosilicon-modified polyglycolide, which adopts a chemical modification method, Prepared polyglycolide-polydimethylsiloxane block copolymer, compared with polyglycolide, the block copolymer has good flexibility, good impact resistance, good heat resistance and other characteristics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation method based on organosilicon-modified polyglycolide, the steps are as follows: 1.0g 1,3-bis(3-aminopropyl)-1,1,3,3-tetramethyldisiloxane and 50g octamethylcyclotetrasiloxane (D4) is placed in four-necked flask, heats up and stirs under 600Pa, adds 0.8g methyl ammonium hydroxide ((CH 3 ) 4 NOH) silicon alkoxide is subjected to ring-opening polymerization reaction, the temperature is raised to 140° C., and low boilers are removed at 50 Pa to obtain diamino-terminated polydimethylsiloxane. Then add dichloromethane solvent into the reaction kettle and stir, then add 80g glycolide, and add 1.0g catalyst tin acetate, pass nitrogen gas to remove the air, vacuumize to 60Pa and react at 130°C for 16h to obtain polyglycolide- Polysiloxane block copolymer.

[0021] After testing, compared with polyglycolide, the elongation at break of the polyglycolide-polysiloxane block copolymer is increased by 21%, and the thermal decomposition temperature is increased by 16°C....

Embodiment 2

[0023] A preparation method based on silicone modified polyglycolide, the steps are as follows: 20g 1,3-bis(3-hydroxyethyl)-1,1,3,3-tetramethyldisiloxane and 20g Put octamethylcyclotetrasiloxane (D4) in a four-necked flask, heat up and stir at 1000Pa, add 0.2g of tin acetate to carry out ring-opening polymerization reaction, then raise the temperature to 160°C, remove low boilers at 150Pa to obtain bis Hydroxy-terminated polydimethylsiloxane. Then add dichloromethane solvent into the reaction kettle and stir, then add 80g of glycolide, and add 4.0g of catalyst stannous octoate. After passing through nitrogen to remove the air, vacuumize to 200Pa and react at 170°C for 12h to obtain polyglycolide- Polysiloxane block copolymer.

[0024] After testing, compared with polyglycolide, the elongation at break of the polyglycolide-polysiloxane block copolymer is increased by 15%, and the thermal decomposition temperature is increased by 14°C.

Embodiment 3

[0026] A preparation method based on organosilicon-modified polyglycolide, the steps are as follows: 0.1g 1,3-bis(3-hydroxyethyl)-1,1,3,3-tetramethyldisiloxane and Put 10g of octamethylcyclotetrasiloxane (D4) in a four-necked flask, heat up and stir at 200Pa, add 0.5g of tin acetate to carry out ring-opening polymerization reaction, then raise the temperature to 250°C, and remove low boilers at 100Pa to obtain Dihydroxy-terminated polydimethylsiloxane. Then add dichloromethane solvent into the reaction kettle and stir, then add 80g glycolide, and add 8.0g catalyst stannous octoate, pass nitrogen gas to remove the air, vacuumize to 120Pa and react at 147°C for 36h to obtain polyglycolide- Polysiloxane block copolymer.

[0027] After testing, compared with polyglycolide, the elongation at break of the polyglycolide-polysiloxane block copolymer is increased by 9%, and the thermal decomposition temperature is increased by 9°C.

[0028] The obtained copolymer can be applied in 3D...

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Abstract

The invention discloses a preparation method of organic silicone modified polyglycollide. The preparation method comprises the following steps: mixing a bifunctional-terminated polysiloxane oligomer with glycolide in the presence of an organic solvent, and performing copolymerization under the action of a catalyst to prepare a polyglycollide-polysiloxane block polymer, namely the organic siliconemodified polyglycollide. Compared with polyglycollide, the block polymer has the characteristics of good flexibility, good shock resistance, good heat resistance and the like, can be applied to the technical field of 3D printing, can be quickly and efficiently prepared into a part with a complicated structure, and can be used for fields of biological engineering and the like.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a preparation method based on organosilicon-modified polyglycolide. Background technique [0002] Since the 20th century, with the development of science and technology, more and more plastic products have been manufactured, which bring convenience to our lives, but at the same time, cause serious "white pollution" because most of them are non-degradable materials. It also greatly affects the physical and mental health of human beings. Therefore, the development of biodegradable materials is imminent. Polyglycolide (PGA), also known as polyglycolic acid or polyglycolic acid, is an important green and environmentally friendly material with biodegradability. Its synthesis mainly includes direct condensation polymerization of glycolic acid and ring-opening polymerization of glycolide. two kinds. It has a wide range of applications in engineering plastics and biomedical applicatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/695C08G77/445C08G63/78B33Y70/00
CPCC08G63/6952B33Y70/00C08G63/78C08G77/445
Inventor 来国桥郝超伟马清芳李泽李美江蒋剑雄陈遒
Owner HANGZHOU NORMAL UNIVERSITY
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