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A kind of chemical synthesis method of poly-β-hydroxy fatty acid ester

A technology of chemical synthesis of hydroxy fatty acid esters, which is applied in the field of chemical synthesis of poly-β-hydroxy fatty acid esters. It can solve the problems of difficulty in obtaining high molecular weight polymers, poor selectivity of polyesters, and expensive lactones. Controllable distribution, mild reaction conditions and high selectivity

Active Publication Date: 2022-08-02
DALIAN UNIV OF TECH
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Problems solved by technology

[0008] The above-mentioned method for preparing polyhydroxyalkanoate has the problem that lactone is expensive and of limited type, and the direct carbonylation polymerization of alkylene oxide and carbon monoxide has low activity and poor polyester selectivity, and it is especially difficult to obtain high-molecular-weight polymers ( m n <2kg / mol), mostly low molecular weight oligomers

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  • A kind of chemical synthesis method of poly-β-hydroxy fatty acid ester
  • A kind of chemical synthesis method of poly-β-hydroxy fatty acid ester
  • A kind of chemical synthesis method of poly-β-hydroxy fatty acid ester

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Embodiment Construction

[0043] The specific embodiments of the present invention (Table 1 and Table 2) are described in detail below in conjunction with the technical solutions. Wherein, Table 1 relates to the copolymerization reaction of carbon monoxide and propylene oxide catalyzed by different metal complexes; Table 2 relates to the copolymerization reaction of carbon monoxide and different alkylene oxides catalyzed by trivalent metal complexes.

[0044] In a 100 mL stainless steel autoclave, at ambient temperature, add in the following order: a certain amount of metal catalyst (any metal complex described in the claims), 5 mL of alkylene oxide, a certain amount of solvent (if required, volume 1 HNMR, to calculate the conversion rate of alkylene oxide, the selectivity and regioselectivity of polymerized products and other parameters. Measured by 500MHz NMR 13 CNMR, calculates the isotacticity of polyester polymers.

[0045] Table 1. Alternate Copolymerization of Carbon Monoxide and Propylene Oxid...

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Abstract

The invention provides a chemical synthesis method of poly-β-hydroxy fatty acid ester. The bifunctional catalyst used for synthesizing high-molecular-weight polyhydroxy fatty acid ester is a bifunctional catalyst that connects two or three metal centers through a phenyl skeleton. Or tri-core, tetradentate Schiff base complexes. The catalyst can catalyze the reaction of carbon monoxide and alkylene oxide at a relatively low concentration to prepare a new material of polyhydroxyalkanoate with alternating structure with high efficiency. Polymer selectivity > 99%, regioselectivity > 99%, alternating structure > 99%, isotactic P m Between 0-100%, the molecular weight is between 1.0-100kg / mol, and the molecular weight distribution is between 1.01-2.00.

Description

technical field [0001] The invention relates to a method for chemical synthesis of poly-β-hydroxy fatty acid ester polymers. A catalytic system composed of bifunctional bimetallic chromium and aluminum complexes can be used to realize the polymerization reaction of various structures of alkylene oxide and carbon monoxide to obtain a series of functional The new material of synthetic poly-β-hydroxy fatty acid ester has the same performance as bio-based poly-β-hydroxy fatty acid ester, but it is easier to be mass-produced. Background technique [0002] Biodegradable polymer materials refer to materials that can be directly biodegraded under certain conditions. The development of biodegradable polymer materials is considered to be an important way to solve environmental pollution, and it has become one of the hot spots in the field of polymer research. At present, the largest domestic and foreign output is ecological plastics, mainly polylactic acid, polyhydroxyalkanoate and st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/82C08G63/83C08G63/84C08G63/08
CPCC08G63/823C08G63/84C08G63/826C08G63/83C08G63/08
Inventor 刘野杨金闯吕小兵
Owner DALIAN UNIV OF TECH
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