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Preparation method of polyacrylate-polyester I-polyester II triblock copolymer

A technology of polyacrylates and acrylates, which is applied in the field of preparation of polyacrylate-polyester I-polyester II triblock copolymers, can solve problems such as harsh reaction conditions, achieve easy operation, improve performance, and structure Various types of effects

Active Publication Date: 2020-02-04
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with the ring-opening polymerization of lactone monomers, the ring-opening copolymerization of epoxide and anhydride monomers requires more severe reaction conditions.

Method used

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  • Preparation method of polyacrylate-polyester I-polyester II triblock copolymer
  • Preparation method of polyacrylate-polyester I-polyester II triblock copolymer
  • Preparation method of polyacrylate-polyester I-polyester II triblock copolymer

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preparation example Construction

[0043] In some embodiments, the preparation method of the present invention includes the following steps:

[0044] (1) The monomer mixed solution is mixed with a multifunctional chain transfer reagent, a catalyst and a free radical initiator to obtain a pre-reaction mixed solution; the monomer mixed solution is an acrylic ester monomer, an epoxy monomer, an acid anhydride A mixed solution of monomers and lactone monomers;

[0045] (2) reacting the pre-reaction mixed solution at 50-80° C. for 12-48 hours to obtain a reaction mixture;

[0046] (3) cooling the reaction mixture described in step (2) to room temperature (20-30° C.), quenching the reaction by introducing air, dissolving the reaction mixture with a polar organic solvent to obtain a mixed solution containing a block copolymer, Add the mixed solution containing the block copolymer dropwise into the precipitating agent to precipitate, filter and separate the precipitate, and dry to obtain the polyacrylate-polyester I-p...

Embodiment 1

[0084] A preparation of polyacrylate-polyester I-polyester II triblock copolymer, under anhydrous and oxygen-free conditions, methyl methacrylate, 1,2-epoxybutylene, ε-caprolactone, After phthalic anhydride and multifunctional chain transfer reagent CTA-1 are mixed, triethyl boron and 1,5,7-triazide bicyclo (4.4.0) dec-5-ene and free radical initiator A one-step polymerization reaction under the combined action of azobisisobutyronitrile. Among them, CTA-1 is a carboxy-terminal trithioester compound with the following structure:

[0085]

[0086] The preparation of this polyacrylate-polyester I-polyester II triblock copolymer specifically comprises the following steps:

[0087] (1) Under anhydrous and anaerobic conditions, methyl methacrylate, 1,2-epoxybutylene, ε-caprolactone, phthalic anhydride and multifunctional chain transfer reagent CTA-1 are mixed according to 250: Take 2.6ml, 4.1mL, 0.5mL, 0.74g, and 80mg at a molar ratio of 500:50:50:2, respectively, and add them ...

Embodiment 2

[0092] A kind of preparation of polyacrylate-polyester I-polyester II triblock copolymer, under anhydrous and oxygen-free condition, benzyl methacrylate, propylene oxide, lactide, norbornene diacid anhydride and After the multifunctional chain transfer reagent CTA-2 is mixed, the composite catalyst triethylboron and 7-methyl-1,5,7-triazabicyclo (4.4.0) dec-5-ene and the free radical initiator couple A one-step polymerization reaction under the combined action of nitrogen diisoheptanonitrile. Among them, CTA-2 is a carboxyl-terminal trithioester compound with the following structure:

[0093]

[0094] The preparation of this polyacrylate-polyester I-polyester II triblock copolymer specifically comprises the following steps:

[0095] (1) Under anhydrous and oxygen-free conditions, benzyl methacrylate, propylene oxide, lactide, norbornene dioic anhydride and multifunctional chain transfer reagent CTA-2 according to 50:500:150:150: Take 0.85mL, 3.5mL, 2.16g, 2.46g, and 0.36g ...

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Abstract

The invention belongs to the technical field of polymer synthesis, and particularly relates to a preparation method of a polyacrylate-polyester I-polyester II triblock copolymer. A carboxyl or hydroxyl-terminated trithioester compound is selected as a multifunctional chain transfer reagent, and is combined with chemical selective polymerization and copolymerization strategies to realize quaternarycopolymerization of an epoxy monomer, an anhydride monomer, a lactone monomer and an acrylate monomer, and the polyacrylate-polyester I-polyester II triblock copolymer is prepared through a one-stepmethod. The block copolymer prepared in the invention has rich structural types, contains one polyacrylate block and two polyester blocks, can significantly improve the performances of the biodegradable polyester block copolymer, and can easily adjust and integrate the excellent properties of the three blocks to obtain the block copolymer with good comprehensive properties; and the relative molecular mass and the block length of the prepared block copolymer are controllable.

Description

technical field [0001] The invention belongs to the technical field of polymer synthesis, and more specifically relates to a preparation method of a polyacrylate-polyester I-polyester II triblock copolymer. Background technique [0002] Plastic is an indispensable material in modern life, and with the rapid development of economy, people's demand for plastic is increasing. However, most of the existing plastics come from fossil fuels, and after losing their use value, they become pollutants that affect the ecological environment because they cannot be degraded naturally. How to deal with waste non-degradable plastics to reduce the impact on the ecological environment is one of the major issues that need to be solved urgently at this stage. [0003] Replacing non-degradable petroleum-based plastics with new biodegradable materials is one of the solutions at this stage. Biodegradable materials, mainly some polyester and polycarbonate materials, have good degradability, non-t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/06C08G63/08C08G63/12C08G63/181C08G63/553C08G63/672C08G63/84C08G63/87C08F293/00
CPCC08F293/005C08F2438/03C08G63/06C08G63/08C08G63/12C08G63/181C08G63/553C08G63/672C08G63/84C08G63/87
Inventor 廖永贵朱帅帅王勇周兴平解孝林
Owner HUAZHONG UNIV OF SCI & TECH
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