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Carbon dioxide-epoxypropane copolymer composite material and preparation method thereof

A technology of propylene oxide and carbon dioxide, which is applied in the field of biodegradable polymer materials, can solve the problems of low glass transition temperature, poor processing performance, large flexibility, etc., and achieves simple process, improved mechanical properties and rheological behavior, and excellent mechanical properties. Effect

Inactive Publication Date: 2018-06-29
HUBEI GUANGHE BIO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbon dioxide-propylene oxide copolymer is an aliphatic polycarbonate. The molecular chain interaction force of carbon dioxide-propylene oxide copolymer is small, which shows that the chain is very flexible. It is amorphous as a whole and has a very high glass transition temperature. low, poor processability
However, the use of stereocomplexed polylactic acid to reinforce carbon dioxide-propylene oxide copolymers and improve its mechanical properties has not been reported

Method used

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  • Carbon dioxide-epoxypropane copolymer composite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Add 100 parts by weight of carbon dioxide-propylene oxide copolymer with a weight average molecular weight of 50,000 and 3 parts by weight of poly-L-lactic acid with a weight average molecular weight of 100,000, and add them to the internal mixer at 165 ° C and 80 rpm. Mix for 10 minutes, then add 7 parts by weight of poly-D-lactic acid with a weight average molecular weight of 100,000 and mix for 20 minutes under the same conditions, and cool to room temperature after blending, which is a carbon dioxide-propylene oxide copolymer composite material. The composite materials were tested by tensile mechanics, melt index and DSC. The results are shown in Table 1.

Embodiment 2

[0024] 100 parts by weight of carbon dioxide-propylene oxide copolymer with a weight average molecular weight of 50,000 and 14 parts by weight of poly-L-lactic acid with a weight average molecular weight of 20,000 were added to the internal mixer, at 165°C and 80 rpm. Mix for 15 minutes, and then add 6 parts by weight of poly(D-lactic acid) with a weight average molecular weight of 20,000 under the same conditions and mix for 15 minutes. After blending, cool to room temperature to form a carbon dioxide-propylene oxide copolymer composite material. The composite materials were tested by tensile mechanics, melt index and DSC. The results are shown in Table 1.

Embodiment 3

[0026] 100 parts by weight of carbon dioxide-propylene oxide copolymer with a weight-average molecular weight of 50,000 and 24 parts by weight of poly-L-lactic acid with a weight-average molecular weight of 200,000 were added to the internal mixer, at 165°C and 80 rpm. Mix for 12 minutes, then add 16 parts by weight of D-lactic acid with a weight-average molecular weight of 50,000 and mix for 18 minutes under the same conditions, and cool to room temperature after blending to form a carbon dioxide-propylene oxide copolymer composite material. The composite materials were tested by tensile mechanics, melt index and DSC. The results are shown in Table 1.

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Abstract

The invention discloses a carbon dioxide-epoxypropane copolymer composite material and a preparation method thereof. The carbon dioxide-epoxypropane copolymer composite material is prepared from the following raw materials in parts by weight: 100 parts by weight of carbon dioxide-epoxypropane copolymer and 10 to 40 parts by weight of stereocomplex polylactic acid, wherein the stereocomplex polylactic acid is prepared from 30 to 70 parts by weight of poly-L-lactic acid and 30 to 70 parts by weight of poly-D-lactic acid. The stereocomplex polylactic acid is blended with the carbon dioxide-epoxypropane copolymer, so that the mechanical property of pure carbon dioxide-epoxypropane copolymer resin can be enhanced. The carbon dioxide-epoxypropane copolymer composite material disclosed by the invention has the advantages that the raw materials are easy to obtain, a technology is simple, non-degradable materials such as a chain extender can be prevented from being introduced by adopting a two-step melt blending method, and other non-degradable matters are not introduced while the mechanical property of the pure carbon dioxide-epoxypropane copolymer resin is enhanced, so that the formed carbon dioxide-epoxypropane copolymer composite material has excellent biodegradability.

Description

technical field [0001] The invention belongs to the technical field of biodegradable polymer materials. It relates to a preparation method of a carbon dioxide-propylene oxide copolymer composite material. Background technique [0002] As a raw material for chemical and energy chemicals, carbon dioxide is a rich and cheap renewable resource. Immobilizing the abundant carbon dioxide resources in the atmosphere can not only open up new resources, alleviate the shortage of chemical raw materials, but also protect the ecological environment. Therefore, the efficient fixation and even high value-added utilization of carbon dioxide has become a world hotspot in the chemical and chemical industry. One of the raw materials of carbon dioxide-propylene oxide copolymer (PPC) is carbon dioxide, which can be fixed by copolymerization of carbon dioxide and propylene oxide; meanwhile, the obtained copolymer is a colorless solid that is non-toxic, odorless, and has excellent barrier propert...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L69/00C08L67/04
Inventor 谢招旺韩常玉
Owner HUBEI GUANGHE BIO TECH