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A kind of synthetic method and product of fully degradable multi-block copolymer

A kind of technology of multi-block copolymer and synthesis method, applied in the field of synthesis of multi-block copolymer

Active Publication Date: 2016-04-13
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] So far, there have been no reports of directly catalyzing the "one-pot" reaction of multiple monomers to synthesize biodegradable carbon-oxo-bonded multi-block copolymers in large quantities.

Method used

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  • A kind of synthetic method and product of fully degradable multi-block copolymer
  • A kind of synthetic method and product of fully degradable multi-block copolymer
  • A kind of synthetic method and product of fully degradable multi-block copolymer

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] The synthesis of embodiment 1 polyester-polycarbonate block copolymer

[0060] Before the reaction, the autoclave was dried in an oven at 110° C. for more than 3 hours, and then placed in a drying tower to cool down to room temperature naturally. Sequentially add 3.0mgZn-Co III DMCC catalyst, 2.0mlCHO, 25.0mg stannous octoate (Sn(Oct) 2 ) catalyst, 50.0μl benzyl alcohol and 2.0mlCL, after closing the reactor, press into 4.0Mpa CO 2 And quickly raise the temperature to 100°C, and after 5 hours of reaction, quickly cool down and release the pressure slowly. 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 polycarbonate, polyester chain unit and polyether chain unit was calculated by hydrogen nuclear magnetic spectrum. The test results are shown in Table 1.

Embodiment 2

[0080] The synthesis of embodiment 2 polyester-polycarbonate block copolymers

[0081] Adopt the method of embodiment 1, difference is only in Zn-Co III The amount of DMCC catalyst used was 2.0 mg. The test results are shown in Table 1.

Embodiment 3

[0082] Synthesis of embodiment 3 polyester-polycarbonate block copolymer

[0083] Adopt the method of embodiment 1, difference is only in Zn-Co III The amount of DMCC catalyst used was 1.0 mg. The test results are shown in Table 1.

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Abstract

The invention discloses a method for synthesizing a fully degraded multi-block copolymer. Catalyst 1, catalyst 2, epoxide, cyclic ester monomer and initiator are added to a reactor, and CO2 is fed to The pressure inside the reactor is normal pressure ~ 5.0MPa, after polymerization and purification, the described fully degradable block copolymer is obtained; the described catalyst 1 is zinc-cobalt double metal cyanide complex, zinc carboxylate, diethyl Zinc-polyproton system, salicylaldimine cobalt or chromium complex, diimine zinc complex or reduced macrocyclic 2,6-salicyldialdimine dizinc complex; the catalyst 2 is an alkyl stannous acid, zinc alkoxide, aluminum alkoxide, alkylaluminum salicylaldimine, alkylaluminum complex or strong organic base. The present invention synthesizes a multi-block copolymer containing alternately arranged polyester and polycarbonate segments through a "one-pot method", which has excellent thermal stability, biodegradability and mechanical properties, and the size and properties of the "soft and hard" phase adjustable.

Description

technical field [0001] The invention belongs to the field of polymer material synthesis, and in particular relates to a method for synthesizing a fully degradable multi-block copolymer and a product thereof. Background technique [0002] Industrial "exhaust gas" carbon dioxide (CO 2 ) as a monomer, alternately copolymerized with epoxides under the action of a catalyst to synthesize biodegradable aliphatic polycarbonate (CO 2 base copolymer), which is a "green" route in line with the principles of low-carbon economy. reported CO 2 The main species of base polymers are linear polymers. such as CO 2 Polypropylene carbonate (PPC), an alternating copolymer with propylene oxide (PO), is a commercialized species with better biodegradability and comparable mechanical properties to polyethylene, but the glass transition temperature (T g ) is generally 35-40 ° C, hard and brittle at low temperature and soft at high temperature, it is difficult to use directly as an elastomer or p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/64
Inventor 张兴宏洪佳丽杜滨阳戚国荣
Owner ZHEJIANG UNIV