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Copolymer of aliphatic polycarbonate and aromatic polyester and its preparation method

A technology of aromatic polyester and polycarbonate, applied in the field of copolymers of aliphatic polycarbonate and aromatic polyester and its preparation, can solve the problem of low melting point, low crystallization temperature and poor processability of aliphatic polycarbonate And other issues

Active Publication Date: 2016-05-11
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the purposes of the present invention is to address the shortcomings of aliphatic polycarbonate such as low melting point, low crystallization temperature and poor processability, thereby providing a more valuable copolymer of aliphatic polycarbonate and aromatic polyester

Method used

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  • Copolymer of aliphatic polycarbonate and aromatic polyester and its preparation method
  • Copolymer of aliphatic polycarbonate and aromatic polyester and its preparation method
  • Copolymer of aliphatic polycarbonate and aromatic polyester and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Embodiment 1. Two-step method prepares the copolymer of aliphatic polycarbonate and aromatic polyester

[0069] 1) In a 10L reactor, add 1500g dimethyl carbonate, 3750g 1,4-butanediol and 0.3g calcium acetate under a nitrogen atmosphere (the molar ratio of dimethyl carbonate to 1,4-butanediol is 1 : 2.5), start the reaction with stirring at 120°C, and then gradually increase the temperature to 225°C, and at each temperature stage, the reaction must be complete before the temperature rises, that is, no by-products are distilled out, and the reaction is up to all the generated methanol and unreacted carbonic acid All the dimethyl esters are distilled off, and the reaction is stopped to obtain a prepolymer of aliphatic polycarbonate having the structure of formula (1), wherein R 1 A straight-chain aliphatic hydrocarbon group with 4 carbon atoms in the main chain;

[0070] 2) In a 10L reactor, add 2910g of terephthalic acid, 2700g of 1,4-butanediol and 4g of tetrabutyl tit...

Embodiment 2

[0073] Embodiment 2. Two-step method prepares the copolymer of aliphatic polycarbonate and aromatic polyester

[0074] 1) In a 10L reactor, add 4500g dimethyl carbonate, 1500g 1,4-butanediol and 2.4g zinc acetate under a nitrogen atmosphere (the molar ratio of dimethyl carbonate to 1,4-butanediol is 3: 1), start the reaction with stirring at 120°C, and then gradually increase the temperature to 235°C, and the reaction must be complete before the temperature rise at each temperature stage, that is, no by-products are distilled out, and the reaction is complete until all the generated methanol and unreacted carbonic acid dicarbonate All the methyl esters are distilled off, and the reaction is stopped to obtain a prepolymer of aliphatic polycarbonate having the structure of formula (1), wherein R 1 A straight-chain aliphatic hydrocarbon group with 4 carbon atoms in the main chain;

[0075] 2) In a 10L reactor, add 2910g dimethyl terephthalate, 2700g 1,4-butanediol and 3.5g tetra...

Embodiment 3

[0077] Embodiment 3. Two-step method prepares the copolymer of aliphatic polycarbonate and aromatic polyester

[0078] 1) In a 10L reactor, add 3300g dimethyl carbonate, 3120g 1,5-pentanediol and 3.3g manganese acetate under a nitrogen atmosphere (the molar ratio of dimethyl carbonate to 1,5-pentanediol is 1.22 : 1), start the reaction with stirring at 120°C, and then gradually increase the temperature to 225°C, and the reaction must be complete before the temperature rise at each temperature stage, that is, no by-products are distilled out, and the reaction is to all the generated methanol and unreacted carbonic acid All the dimethyl esters are distilled off, and the reaction is stopped to obtain a prepolymer of aliphatic polycarbonate having the structure of formula (1), wherein R 1 A straight-chain aliphatic hydrocarbon group with 5 carbon atoms in the main chain;

[0079] 2) In a 10L reactor, add 2490g of terephthalic acid, 3120g of 1,5-pentanediol and 3g of alumina under...

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Abstract

The invention relates to a copolymer of aliphatic polycarbonate and aromatic polyester and a preparation method thereof. The copolymer is prepared by using aromatic binary acid or ester thereof, dialkyl group carbonic ester or diaryl carbonic ester thereof and aliphatic dihydric alcohol as monomers under an inert gas atmosphere in a two-step method or a one-step method. The cost of materials is low, the preparation process is simple, the cost of products is lowered, the copolymer of the aliphatic polycarbonate and the aromatic polyester is crystalline-state white solid, and the number-average molar mass is greater than 2000, so that the melting point, crystallization property and processing property of the aliphatic polycarbonate are effectively improved. The copolymer is a degradable high-polymer material with the biological degradation property of the aliphatic polycarbonate, has excellent thermodynamics and machining property of the aromatic polyester, and can be widely applied to preparation of environment-friendly plastic products and impact modifiers of fragile materials.

Description

technical field [0001] The invention relates to a copolymer of aliphatic polycarbonate and aromatic polyester and a preparation method thereof. Background technique [0002] Aliphatic polycarbonate is a new type of polymer material that is completely biodegradable. It has good biocompatibility, physical and mechanical properties, and adjustable structural properties; therefore, biodegradable aliphatic polycarbonate is used in surgery Sutures, bone fixation materials, and controlled release of drugs are increasingly used. However, the low melting point and crystallization temperature of aliphatic polycarbonate limit its large-scale application. Compared with aliphatic polycarbonate, aromatic polyester has excellent thermal properties, mechanical properties, processing properties and low price, and has been widely used in various fields; however, its biodegradability is poor, and it causes great harm to the environment after being discarded. big pollution. [0003] Introduc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/64
Inventor 张洁朱文祥李春成张栋管国虎肖耀南郑柳春
Owner INST OF CHEM CHINESE ACAD OF SCI