Carbon dioxide-based polycarbonate containing abb structure and synthesis method thereof

A technology based on polycarbonate and carbon dioxide, applied in the field of carbon dioxide-based polycarbonate and its synthesis, can solve the problems such as the decline of mechanical properties of polymers, and achieve the effect of broadening the possibility and regulating the polymerization product.

Active Publication Date: 2022-04-19
烯欧途(杭州)新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the introduction of the polyether structure also led to a decrease in the mechanical properties of the polymer
As an intermediate structure between carbonate units and ether units, the abb structure has both the advantages of polycarbonate and polyether, but there is no relevant report on carbon dioxide-based polycarbonate containing abb structure

Method used

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  • Carbon dioxide-based polycarbonate containing abb structure and synthesis method thereof
  • Carbon dioxide-based polycarbonate containing abb structure and synthesis method thereof
  • Carbon dioxide-based polycarbonate containing abb structure and synthesis method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] Embodiment 1 The synthetic method of the carbon dioxide-based polypropylene carbonate containing abb structure is as follows:

[0091] Adopt catalyst 1 structural formula as follows:

[0092]

[0093] Purified propylene oxide PO (3g, 51.7mmol) and catalyst 1 (25.6mg, 0.052mmol) were added to the autoclave under anhydrous and oxygen-free conditions, filled with carbon dioxide (2.0MPa), and reacted at 40°C for 6h. After the product is dissolved in dichloromethane, the impurity such as catalyst is washed away by precipitation with methanol solution of hydrochloric acid, and the following carbon dioxide-based polypropylene carbonate containing abb structure is obtained:

[0094]

[0095] The results of hydrogen nuclear magnetic spectrum showed that the carbonate units accounted for 91.2%, the abb structural units accounted for 8.2%, and the ether units accounted for 0.5% (molar ratio) in the polypropylene carbonate.

Embodiment 2

[0097] The synthetic method of the carbon dioxide-based polypropylene carbonate containing abb structure is as follows:

[0098] Add purified propylene oxide PO (3g, 51.7mmol) and catalyst 1 (25.6mg, 0.052mmol) into the autoclave under anhydrous and oxygen-free conditions, fill with carbon dioxide (1.0MPa), and react at 90°C for 0.3h . After the product is dissolved in dichloromethane, the impurity such as catalyst is washed away by precipitation with methanol solution of hydrochloric acid, and the following carbon dioxide-based polypropylene carbonate containing abb structure is obtained:

[0099]

[0100] The results of hydrogen nuclear magnetic spectrum showed that the carbonate unit accounted for 57.8%, the abb structure unit accounted for 36.4%, and the ether unit accounted for 5.8% (molar ratio) in the polypropylene carbonate.

[0101] The DSC curve contrast chart of the polypropylene carbonate of different constituent unit ratios in embodiment 1,2 is as image 3 as s...

Embodiment 3

[0103] The synthetic method of the carbon dioxide-based polypropylene carbonate containing abb structure is as follows:

[0104] Adopt catalyst 2 structural formula as follows:

[0105]

[0106] Purified propylene oxide PO (3g, 51.7mmol) and catalyst 2 (38.8mg, 0.052mmol) were added to the autoclave under anhydrous and oxygen-free conditions, filled with carbon dioxide (2.0MPa), and reacted at 40°C for 6h. After the product is dissolved in dichloromethane, the impurity such as catalyst is washed away by precipitation with methanol solution of hydrochloric acid, and the following carbon dioxide-based polypropylene carbonate containing abb structure is obtained:

[0107]

[0108] The results of hydrogen nuclear magnetic spectrum showed that the carbonate units accounted for 69.7%, the abb structural units accounted for 21.4%, and the ether units accounted for 8.9% (molar ratio) in the polypropylene carbonate.

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Abstract

The invention discloses a carbon dioxide-based polycarbonate containing an abb structure and a synthesis method thereof, under the action of a difunctional organic boron catalyst, carbon dioxide and alkylene oxide as shown in a formula I are subjected to a copolymerization reaction, the carbon dioxide is used as a structural unit a, the alkylene oxide is subjected to ring opening to serve as a structural unit b to be inserted into a polymer chain, and the carbon dioxide-based polycarbonate containing the abb structure is obtained. Copolymerizing to form carbon dioxide-based polycarbonate containing an abb structure as shown in a formula II; the ab structural unit represents a carbonate unit formed by ring-opening copolymerization of carbon dioxide and one alkylene oxide, the abb structural unit is formed by ring-opening copolymerization of carbon dioxide and two alkylene oxides in sequence, and the bbb structural unit represents an ether unit formed by ring-opening auto-polymerization of alkylene oxides; the molar fraction of the abb structure is 1%-100%. The composition of the polycarbonate can be selectively regulated and controlled by changing one or more reaction conditions such as the catalyst structure, the ratio of the catalyst to the epoxyalkane, the reaction temperature, the carbon dioxide pressure and the reaction time, and the possibility of composition and application of the polycarbonate is widened.

Description

technical field [0001] The invention belongs to the field of polymer materials, and relates to a carbon dioxide-based polycarbonate containing an abb structure and a synthesis method thereof. Background technique [0002] As a class of polymer materials with good biodegradability and biocompatibility, polycarbonate is of great significance for solving environmental pollution and plastic recycling problems, and has been widely used in engineering thermoplastics, coatings, adhesives, Medical devices and packaging materials and other fields. [0003] Traditional methods for synthesizing polycarbonate mainly include phosgene method and transesterification method. However, phosgene, the raw material of the phosgene method, is highly toxic and likely to cause harmful effects on the environment (Green Chem., 2003, 5, 497–507); the transesterification method needs to remove by-products under severe conditions of high temperature and low pressure , the energy consumption is serious...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G64/34
CPCC08G64/34
Inventor 杨贯文徐逞锴陆新宇张瑶瑶李博
Owner 烯欧途(杭州)新材料科技有限公司
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