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Methyl ethylene carbonic ester block copolymer and preparation method thereof

A technology of methyl ethylene carbonate and block copolymer, applied in the field of polymer materials, can solve problems such as poor mechanical properties and thermal properties, and achieve the effects of high thermal stability, low equipment requirements, and easy industrialization.

Active Publication Date: 2010-12-08
SUN YAT SEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the relatively poor mechanical properties and thermal properties of existing binary copolymer polymethylethylene carbonate and random terpolymer polymethylethylene-cyclohexylene carbonate, and provide A block copolymer of methylethylene carbonate, its mechanical properties and thermal properties are much better than the existing polymethylethylene carbonate and polymethylethylene-cyclohexylene carbonate copolymer

Method used

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  • Methyl ethylene carbonic ester block copolymer and preparation method thereof
  • Methyl ethylene carbonic ester block copolymer and preparation method thereof
  • Methyl ethylene carbonic ester block copolymer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1-10

[0048] The preparation method of methyl ethylene carbonate-cyclohexylene carbonate diblock copolymer (PPC-PCHC):

[0049] Put 1.0 g of loaded zinc dicarboxylate in an autoclave, and dry it under vacuum at 80°C for 24 hours, then cool the autoclave to room temperature, and quickly inhale 100 ml of PO under vacuum. Then filled with CO 2 , stirred at a speed of 100 rpm, heated to 60° C., adjusted to 5.2 MPa in the kettle, and reacted for 12 hours. Then the reactor was cooled rapidly under an ice bath to release carbon dioxide. After vacuuming, quickly inhaled CHO and introduced CO 2 , stirred at a speed of 100rpm, heated to 80°C, adjusted the pressure in the kettle to 5.0-5.2MPa, reacted for 12 hours, cooled to room temperature, released carbon dioxide, and took out the viscous mixture in the kettle. The product was dissolved in chloroform, and the catalyst in the system was removed with 5 wt% dilute hydrochloric acid solution, and washed three times with distilled water. Then...

Embodiment 11-18

[0054] The preparation method of cyclohexylene carbonate-methylethylene carbonate-cyclohexylene carbonate triblock copolymer (PCHC-PPC-PCHC):

[0055] Put 1.0 g of loaded zinc dicarboxylate in the autoclave, and dry it under vacuum at 80°C for 24 hours, then cool the autoclave to room temperature, quickly inhale CHO under vacuum, and pass in CO 2 , stirred at a speed of 100rpm, heated to 80°C, and adjusted the pressure inside the kettle to 5.2MPa. After 12 hours of reaction, the reaction kettle was rapidly cooled in an ice bath to release carbon dioxide, and 100ml PO was quickly inhaled under vacuum. Then filled with CO 2 , stirred at a speed of 100rpm, heated to 60°C, and adjusted the pressure inside the kettle to 5.2MPa. After 12 hours of reaction, the reactor was rapidly cooled in an ice bath to release carbon dioxide, quickly inhaled CHO under vacuum, and introduced CO 2 , stirred at a speed of 100rpm, heated to 80°C, adjusted the pressure inside the kettle to 5.2MPa, rea...

Embodiment 19-24

[0061] different temperature and CO 2 Methylethylene carbonate-cyclohexylene carbonate diblock copolymer under pressure (PPC-PCHC), cyclohexylene carbonate-methylethylene carbonate-cyclohexylene carbonate triblock copolymer (PCHC -PPC-PCHC) preparation:

[0062] According to the preparation method of the above-mentioned examples 1-10, 11-18, adjust PO, CHO monomer and CO 2 The reaction temperature and pressure, as shown in table 3, carry out methyl ethylene carbonate-cyclohexylene carbonate diblock copolymer (PPC-PCHC), cyclohexylene carbonate-methyl ethylene carbonate-ring The preparation of hexylene carbonate triblock copolymer (PCHC-PPC-PCHC) is shown in Examples 19-24. At the same time, the block copolymers prepared in Examples 19-24 were placed in a flat vulcanizer and pressed for 3 minutes at 170°C for direct molding; the resulting block polymers were cut into standard strips of 25mm×1mm×4mm for The performance test results are shown in Table 4.

[0063] Table 3 prep...

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Abstract

The invention discloses a methyl ethylene carbonic ester block copolymer and a preparation method thereof. The structure of the block copolymer is shown as (I) or (II). In the invention, a segmented polymerization method is adopted to ensure that carbon dioxide sequentially reacts with propylene oxide or cyclohexene oxide monomers in the presence of the catalysis of loaded binary carboxylic zinc to synthesize a di-block or tri-block polymer containing soft block polymethyl ethylene carbonic ester and hard block polyethylene carbonic ester. Due to the introduction of a hard polyethylene carbonic ester block, the prepared block copolymer has a chemical structure similar to an SBS (Styrene-Butadiene-Styrene) thermoplastic elastomer, and the thermal property and the mechanical property of the block copolymer are obviously superior to that of the traditional polymethyl ethylene carbonic ester as a binary copolymer and a methyl ethylene carbonic ester-cycloethylene carbonic ester random copolymer, thereby the application scope of the polymethyl ethylene carbonic ester is expanded, and the industrialization of carbon dioxide based plastics is promoted.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a methyl ethylene carbonate block copolymer and a preparation method thereof. technical background [0002] carbon dioxide (CO 2 ) is a greenhouse gas that forms a thermal "shield" over the Earth's surface and contributes two-thirds of all greenhouse gases combined to global warming. At the same time, carbon dioxide is a cheap and high-quality carbon source. Therefore, whether it is from the perspective of environmental protection or the development of carbon resources, the comprehensive utilization of carbon dioxide is very important. The copolymerization of carbon dioxide and epoxy compounds into degradable plastics not only effectively utilizes carbon dioxide, but also helps alleviate the increasingly serious problems of the greenhouse effect and white pollution, and has become the focus of research by scientists from all over the world. [0003] At present, a large number o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G64/34C08G64/18
Inventor 孟跃中陈少云王拴紧肖敏吴静姝韩东梅杜风光甘力强武建锋吴胜先
Owner SUN YAT SEN UNIV
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