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Method for synthesizing aliphatic polyester by copolymerization of epoxide and cyclic acid anhydride under catalysis of metal-free catalyst

A technology of aliphatic polyester and epoxide, which is applied in the field of aliphatic polyester by the copolymerization of epoxide and cyclic acid anhydride catalyzed by metal-free catalysts, can solve the problems of water source, soil, air pollution, white pollution, etc., and achieve narrow Effects of molecular weight distribution, high yield, and high catalytic efficiency

Active Publication Date: 2019-09-10
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, ordinary plastic itself is difficult to degrade, and the existing treatment methods for waste plastic products have caused great pollution to water sources, soil, air, etc., and caused white pollution

Method used

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  • Method for synthesizing aliphatic polyester by copolymerization of epoxide and cyclic acid anhydride under catalysis of metal-free catalyst
  • Method for synthesizing aliphatic polyester by copolymerization of epoxide and cyclic acid anhydride under catalysis of metal-free catalyst
  • Method for synthesizing aliphatic polyester by copolymerization of epoxide and cyclic acid anhydride under catalysis of metal-free catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Weigh 0.01g of TPP catalyst and 3.84g of succinic anhydride into the reaction flask, and vacuumize; add 3mL of epichlorohydrin and 3mL of N,N-dimethylformamide into the reaction flask in turn, raise the temperature to 80°C, and heat 10h, then cooled to room temperature; the polymer was dissolved from the reaction flask with chloroform, and the product was precipitated with n-hexane as a subsidence agent, and placed in a vacuum drying oven at 80°C for vacuum drying to obtain 7.57 g of fatty acid polyester. The polyester content in fatty acid polyester is 94%.

Embodiment 2

[0042] Weigh 0.01g of TPP catalyst and 4.28g of succinic anhydride into the reaction flask, vacuumize and replace the air; put 3mL of propylene oxide and 3mL of N,N-dimethylformamide into the reaction flask, heat up to 80°C, Heating for 10 hours, then cooling to room temperature; eluting the polymer from the reaction flask with chloroform, and using n-hexane as a subsidence agent, after the product was precipitated, placed in a vacuum drying oven at 80°C for vacuum drying to obtain 4.96 g of fatty acid polyester , the polyester content in the fatty acid polyester is 60%.

Embodiment 3

[0044] Weigh 0.01g of TPP catalyst and 2.63g of succinic anhydride into the reaction flask, vacuumize and replace the air; put 3mL of styrene oxide and 3mL of N,N-dimethylformamide into the reaction flask, heat up to 80°C, Heated for 10 hours, then cooled to room temperature; the polymer was dissolved from the reaction flask with chloroform, and n-hexane was used as a sedimentation agent. After the product was precipitated, it was placed in a vacuum drying oven at 80°C and vacuum-dried to obtain 5.23 g of fatty acid polyester , the polyester content in the fatty acid polyester is 90%.

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Abstract

The invention discloses a method for synthesizing an aliphatic polyester by copolymerization of an epoxide and a cyclic acid anhydride under catalysis of a metal-free catalyst. The method comprises the following steps: placing the metal-free catalyst and the cyclic acid anhydride in a reaction flask, performing vacuumization, sequentially adding the epoxide and a solvent into the reaction flask, performing heating for a reaction at a certain temperature, performing cooling to a room temperature, dissolving out a polymer from the reaction flask by using trichloromethane, precipitating the product by using n-hexane as a settling agent, and performing vacuum drying at a certain temperature to obtain the aliphatic polyester. According to the synthetic method provided by the invention, the epoxide and the cyclic acid anhydride are used as monomers, a polymerization reaction is initiated by using the metal-free catalyst under dry and anaerobic conditions, and the aliphatic polyester is obtained by post-treatment; the method has the advantages of no metal residues, high catalytic efficiency, good selectivity, a high yield and narrow molecular weight distribution; and the method has very high practical value.

Description

technical field [0001] The invention belongs to the technical field of polymer material synthesis, and relates to a method for synthesizing aliphatic polyester by catalyzing the copolymerization of epoxide and cyclic acid anhydride with a metal-free catalyst. Background technique [0002] With the development of social economy, plastic products have become an indispensable item in daily life. However, ordinary plastic itself is difficult to degrade, and the existing treatment methods for waste plastic products have caused great pollution to water sources, soil, air, etc., and caused white pollution. Therefore, people gradually focus on polyester-based polymer biodegradable materials, and use such materials to replace starch-based filling materials to overcome the shortcomings of starch-based biodegradable materials. Polyester polymer materials include aliphatic degradable polyester and aromatic polyester. Aromatic polyester has a rigid benzene ring structure, which affects ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/42C08G63/87
CPCC08G63/42C08G63/87
Inventor 宋鹏飞柳娜王倩王俐艳马玮刘燕
Owner NORTHWEST NORMAL UNIVERSITY
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