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Terpolymer containing polyester chain links and polycarbonate chain links and synthetic method thereof

A terpolymer and a synthesis method technology are applied to the terpolymer containing polyester chain segment and polycarbonate chain segment and the field of synthesis thereof, which can solve the problem that the degradability of the polycarbonate segment is not improved, and the cyclic cyclone cannot be avoided. Carbonate, low catalyst activity, etc., to achieve the effect of inhibiting self-polymerization and inhibiting the generation of polyether chain units

Active Publication Date: 2009-11-04
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this reaction catalyst activity is not high, and this reaction catalyzed by diimide zinc catalyst can not avoid the generation of cyclic carbonate, and the polymerization product of reaction is block copolymer, and polyester chain link fails to play a role in the whole molecular chain. The effect of splitting the hydrophobic cyclohexyl group, the degradability of the polycarbonate segment has not been improved, so the degradability of the polymer product has not been fundamentally improved

Method used

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  • Terpolymer containing polyester chain links and polycarbonate chain links and synthetic method thereof
  • Terpolymer containing polyester chain links and polycarbonate chain links and synthetic method thereof
  • Terpolymer containing polyester chain links and polycarbonate chain links and synthetic method thereof

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Experimental program
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Effect test

Embodiment 1

[0038] The synthesis of embodiment 1 polyester

[0039] Before the polymerization reaction, the high-pressure reaction kettle with a capacity of 60ml was removed at 110°C for about 2 hours and cooled to room temperature in a drying tower. Add 3.0mg of Zn-Co DMC, 2.0g of maleic anhydride, 4.0mL of cyclohexene oxide and 4.0mL of tetrahydrofuran to the reaction kettle in sequence, seal the reaction kettle, add it to an oil bath preheated to 90°C, and stir the reaction with magnetic force After 5 hours, the temperature was rapidly lowered, the pressure was released, and the crude product was taken out. First remove the solvent under reduced pressure, then dissolve the crude product with THF, precipitate the polymer in methanol, and obtain a yellow product after vacuum drying. The conversion rate is calculated by weighing method, and the content of polyester chain and polyether chain is calculated by nuclear magnetic hydrogen spectroscopy. . The test results are shown in Table 2....

Embodiment 2

[0040] The synthesis of embodiment 2 polycarbonates

[0041] Before the polymerization reaction, the high-pressure reaction kettle with a capacity of 60ml was removed at 110°C for about 2 hours and cooled to room temperature in a drying tower. Add 3.0mg of Zn-Co DMC, 4.0mL of cyclohexene oxide, and 4.0mL of tetrahydrofuran in sequence, seal the reaction kettle, add it to an oil bath preheated to 90°C, stir it magnetically, and then fill it with CO 2 to CO 2 The pressure was 4.0 MPa. After reacting for 5 hours, the temperature was rapidly lowered, the pressure was released, and the crude product was taken out. The crude product was subjected to CH 2 Cl 2 After washing with / methanol and drying in vacuum, a yellow product was obtained, the conversion rate was calculated by weighing method, and the content of polyester chain unit and polyether chain unit was calculated by hydrogen nuclear magnetic spectrum. The test results are shown in Table 2.

Embodiment 3

[0042] The synthesis of embodiment 3 polycarbonates

[0043] The method of Example 2 was adopted, the only difference being that dioxane was used instead of tetrahydrofuran as a solvent. The test results are shown in Table 2.

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Abstract

The invention discloses a terpolymer containing polyester chain links and polycarbonate chain links and a synthetic method thereof. The synthetic method comprises the following steps: mixing zinc-cobalt double metal cyanide complex catalyst, cyclohexene oxide and dicarboxylic anhydride in a solvent, introducing CO2 under the temperature of 30 to 150 DEG C till the pressure of CO2 is 0.5 to 10.0MPa, carrying out copolyreaction for 0.5 to 48 hours so as to obtain a crude product, and preparing the terpolymer which contains polyester chain links and polycarbonate chain links and has excellent thermal property and easy decomposition after purification. The molar percentage content of the polyester chain links, the polycarbonate chain links and polyether chain links of the terpolymer containing polyester chain links and polycarbonate chain links in the main chain are respectively 5 to 70 percent, 23 to 90 percent and 0.5 to 7 percent.

Description

technical field [0001] The invention belongs to the field of polymer material synthesis, and specifically relates to a degradable terpolymer containing polyester chain segments and polycarbonate chain segments and a synthesis method thereof with good thermal stability. Background technique [0002] Biodegradable polymer materials are an important part of biomedical materials. Since it does not need to be taken out by secondary surgery after being implanted in the living body, and does not accumulate in the body, it has become the most active field in the research of biomedical materials. For example, polylactic acid and aliphatic polycarbonate are important and widely researched biodegradable materials. Whereas from CO 2 The aliphatic polycarbonate synthesized from CO 2 Copolymer due to the use of very cheap and non-toxic CO 2 It has become a hot issue in the research field of degradable polymer materials. [0003] There are two main types of CO 2 Copolymers are widely...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/64C08G63/83
Inventor 张兴宏孙学科戚国荣
Owner ZHEJIANG UNIV
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